6.1.42-rc1 review

index 0452ee586c1cc..a81829c10feab 100644
@@ -1930,7 +1930,11 @@ static void nft_pipapo_remove(const struct net *net, const struct nft_set *set,
 		int i, start, rules_fx;
 
 		match_start = data;
-		match_end = (const u8 *)nft_set_ext_key_end(&e->ext)->data;
+
+		if (nft_set_ext_exists(&e->ext, NFT_SET_EXT_KEY_END))
+			match_end = (const u8 *)nft_set_ext_key_end(&e->ext)->data;
+		else
+			match_end = data;
 
 		start = first_rule;
 		rules_fx = rules_f0;

index 0bb1cc7ed5e99..f621c5e48747b 100644
@@ -10398,6 +10398,9 @@ static void __nft_release_table(struct net *net, struct nft_table *table)
 	ctx.family = table->family;
 	ctx.table = table;
 	list_for_each_entry(chain, &table->chains, list) {
+		if (nft_chain_is_bound(chain))
+			continue;
+
 		ctx.chain = chain;
 		list_for_each_entry_safe(rule, nr, &chain->rules, list) {
 			list_del(&rule->list);

index f621c5e48747b..ecde497368ec4 100644
@@ -3892,6 +3892,8 @@ static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
 		list_for_each_entry(chain, &table->chains, list) {
 			if (!nft_is_active_next(net, chain))
 				continue;
+			if (nft_chain_is_bound(chain))
+				continue;
 
 			ctx.chain = chain;
 			err = nft_delrule_by_chain(&ctx);

index 84c5ce57eab69..ddbcbf9ccb2ce 100644
@@ -807,6 +807,7 @@ struct hci_conn_params {
 
 	struct hci_conn *conn;
 	bool explicit_connect;
+	/* Accessed without hdev->lock: */
 	hci_conn_flags_t flags;
 	u8  privacy_mode;
 };

@@ -1536,7 +1537,11 @@ struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
 					    bdaddr_t *addr, u8 addr_type);
 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
+void hci_conn_params_free(struct hci_conn_params *param);
 
+void hci_pend_le_list_del_init(struct hci_conn_params *param);
+void hci_pend_le_list_add(struct hci_conn_params *param,
+			  struct list_head *list);
 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
 						  bdaddr_t *addr,
 						  u8 addr_type);

index fef09d2121384..61059571c8779 100644
@@ -117,7 +117,7 @@ static void hci_connect_le_scan_cleanup(struct hci_conn *conn, u8 status)
 	 */
 	params->explicit_connect = false;
 
-	list_del_init(&params->action);
+	hci_pend_le_list_del_init(params);
 
 	switch (params->auto_connect) {
 	case HCI_AUTO_CONN_EXPLICIT:

@@ -126,10 +126,10 @@ static void hci_connect_le_scan_cleanup(struct hci_conn *conn, u8 status)
 		return;
 	case HCI_AUTO_CONN_DIRECT:
 	case HCI_AUTO_CONN_ALWAYS:
-		list_add(&params->action, &hdev->pend_le_conns);
+		hci_pend_le_list_add(params, &hdev->pend_le_conns);
 		break;
 	case HCI_AUTO_CONN_REPORT:
-		list_add(&params->action, &hdev->pend_le_reports);
+		hci_pend_le_list_add(params, &hdev->pend_le_reports);
 		break;
 	default:
 		break;

@@ -1398,8 +1398,8 @@ static int hci_explicit_conn_params_set(struct hci_dev *hdev,
 	if (params->auto_connect == HCI_AUTO_CONN_DISABLED ||
 	    params->auto_connect == HCI_AUTO_CONN_REPORT ||
 	    params->auto_connect == HCI_AUTO_CONN_EXPLICIT) {
-		list_del_init(&params->action);
-		list_add(&params->action, &hdev->pend_le_conns);
+		hci_pend_le_list_del_init(params);
+		hci_pend_le_list_add(params, &hdev->pend_le_conns);
 	}
 
 	params->explicit_connect = true;

index ca42129f8f91a..be0e6865b340f 100644
@@ -2249,21 +2249,45 @@ struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
 	return NULL;
 }
 
-/* This function requires the caller holds hdev->lock */
+/* This function requires the caller holds hdev->lock or rcu_read_lock */
 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
 						  bdaddr_t *addr, u8 addr_type)
 {
 	struct hci_conn_params *param;
 
-	list_for_each_entry(param, list, action) {
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(param, list, action) {
 		if (bacmp(&param->addr, addr) == 0 &&
-		    param->addr_type == addr_type)
+		    param->addr_type == addr_type) {
+			rcu_read_unlock();
 			return param;
+		}
 	}
 
+	rcu_read_unlock();
+
 	return NULL;
 }
 
+/* This function requires the caller holds hdev->lock */
+void hci_pend_le_list_del_init(struct hci_conn_params *param)
+{
+	if (list_empty(&param->action))
+		return;
+
+	list_del_rcu(&param->action);
+	synchronize_rcu();
+	INIT_LIST_HEAD(&param->action);
+}
+
+/* This function requires the caller holds hdev->lock */
+void hci_pend_le_list_add(struct hci_conn_params *param,
+			  struct list_head *list)
+{
+	list_add_rcu(&param->action, list);
+}
+
 /* This function requires the caller holds hdev->lock */
 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
 					    bdaddr_t *addr, u8 addr_type)

@@ -2297,14 +2321,15 @@ struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
 	return params;
 }
 
-static void hci_conn_params_free(struct hci_conn_params *params)
+void hci_conn_params_free(struct hci_conn_params *params)
 {
+	hci_pend_le_list_del_init(params);
+
 	if (params->conn) {
 		hci_conn_drop(params->conn);
 		hci_conn_put(params->conn);
 	}
 
-	list_del(&params->action);
 	list_del(&params->list);
 	kfree(params);
 }

@@ -2342,8 +2367,7 @@ void hci_conn_params_clear_disabled(struct hci_dev *hdev)
 			continue;
 		}
 
-		list_del(&params->list);
-		kfree(params);
+		hci_conn_params_free(params);
 	}
 
 	BT_DBG("All LE disabled connection parameters were removed");

index b272cc1f36481..ec9b0612f2761 100644
@@ -1558,7 +1558,7 @@ static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data,
 
 	params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type);
 	if (params)
-		params->privacy_mode = cp->mode;
+		WRITE_ONCE(params->privacy_mode, cp->mode);
 
 	hci_dev_unlock(hdev);
 

@@ -2809,8 +2809,8 @@ static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
 
 		case HCI_AUTO_CONN_DIRECT:
 		case HCI_AUTO_CONN_ALWAYS:
-			list_del_init(&params->action);
-			list_add(&params->action, &hdev->pend_le_conns);
+			hci_pend_le_list_del_init(params);
+			hci_pend_le_list_add(params, &hdev->pend_le_conns);
 			break;
 
 		default:

@@ -3428,8 +3428,8 @@ static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
 
 		case HCI_AUTO_CONN_DIRECT:
 		case HCI_AUTO_CONN_ALWAYS:
-			list_del_init(&params->action);
-			list_add(&params->action, &hdev->pend_le_conns);
+			hci_pend_le_list_del_init(params);
+			hci_pend_le_list_add(params, &hdev->pend_le_conns);
 			hci_update_passive_scan(hdev);
 			break;
 

@@ -5952,7 +5952,7 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
 	params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
 					   conn->dst_type);
 	if (params) {
-		list_del_init(&params->action);
+		hci_pend_le_list_del_init(params);
 		if (params->conn) {
 			hci_conn_drop(params->conn);
 			hci_conn_put(params->conn);

205 lines not on this page · raw message

index 815f2abe918ef..89c94f3e96bc3 100644
@@ -1297,15 +1297,15 @@ static void restart_le_actions(struct hci_dev *hdev)
 		/* Needed for AUTO_OFF case where might not "really"
 		 * have been powered off.
 		 */
-		list_del_init(&p->action);
+		hci_pend_le_list_del_init(p);
 
 		switch (p->auto_connect) {
 		case HCI_AUTO_CONN_DIRECT:
 		case HCI_AUTO_CONN_ALWAYS:
-			list_add(&p->action, &hdev->pend_le_conns);
+			hci_pend_le_list_add(p, &hdev->pend_le_conns);
 			break;
 		case HCI_AUTO_CONN_REPORT:
-			list_add(&p->action, &hdev->pend_le_reports);
+			hci_pend_le_list_add(p, &hdev->pend_le_reports);
 			break;
 		default:
 			break;

@@ -5161,7 +5161,7 @@ static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
 		goto unlock;
 	}
 
-	params->flags = current_flags;
+	WRITE_ONCE(params->flags, current_flags);
 	status = MGMT_STATUS_SUCCESS;
 
 	/* Update passive scan if HCI_CONN_FLAG_DEVICE_PRIVACY

@@ -7573,7 +7573,7 @@ static int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr,
 	if (params->auto_connect == auto_connect)
 		return 0;
 
-	list_del_init(&params->action);
+	hci_pend_le_list_del_init(params);
 
 	switch (auto_connect) {
 	case HCI_AUTO_CONN_DISABLED:

@@ -7582,18 +7582,18 @@ static int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr,
 		 * connect to device, keep connecting.
 		 */
 		if (params->explicit_connect)
-			list_add(&params->action, &hdev->pend_le_conns);
+			hci_pend_le_list_add(params, &hdev->pend_le_conns);
 		break;
 	case HCI_AUTO_CONN_REPORT:
 		if (params->explicit_connect)
-			list_add(&params->action, &hdev->pend_le_conns);
+			hci_pend_le_list_add(params, &hdev->pend_le_conns);
 		else
-			list_add(&params->action, &hdev->pend_le_reports);
+			hci_pend_le_list_add(params, &hdev->pend_le_reports);
 		break;
 	case HCI_AUTO_CONN_DIRECT:
 	case HCI_AUTO_CONN_ALWAYS:
 		if (!is_connected(hdev, addr, addr_type))
-			list_add(&params->action, &hdev->pend_le_conns);
+			hci_pend_le_list_add(params, &hdev->pend_le_conns);
 		break;
 	}
 

@@ -7816,9 +7816,7 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
 			goto unlock;
 		}
 
-		list_del(&params->action);
-		list_del(&params->list);
-		kfree(params);
+		hci_conn_params_free(params);
 
 		device_removed(sk, hdev, &cp->addr.bdaddr, cp->addr.type);
 	} else {

@@ -7849,9 +7847,7 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
 				p->auto_connect = HCI_AUTO_CONN_EXPLICIT;
 				continue;
 			}
-			list_del(&p->action);
-			list_del(&p->list);
-			kfree(p);
+			hci_conn_params_free(p);
 		}
 
 		bt_dev_dbg(hdev, "All LE connection parameters were removed");

index ec9b0612f2761..83eaf25ece465 100644
@@ -2789,6 +2789,9 @@ static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
 			hci_enable_advertising(hdev);
 		}
 
+		/* Inform sockets conn is gone before we delete it */
+		hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
+
 		goto done;
 	}
 

index cb959e8eac185..699e4f400df29 100644
@@ -116,8 +116,11 @@ static struct iso_conn *iso_conn_add(struct hci_conn *hcon)
 {
 	struct iso_conn *conn = hcon->iso_data;
 
-	if (conn)
+	if (conn) {
+		if (!conn->hcon)
+			conn->hcon = hcon;
 		return conn;
+	}
 
 	conn = kzalloc(sizeof(*conn), GFP_KERNEL);
 	if (!conn)

@@ -285,14 +288,13 @@ static int iso_connect_bis(struct sock *sk)
 		goto unlock;
 	}
 
-	hci_dev_unlock(hdev);
-	hci_dev_put(hdev);
+	lock_sock(sk);
 
 	err = iso_chan_add(conn, sk, NULL);
-	if (err)
-		return err;
-
-	lock_sock(sk);
+	if (err) {
+		release_sock(sk);
+		goto unlock;
+	}
 
 	/* Update source addr of the socket */
 	bacpy(&iso_pi(sk)->src, &hcon->src);

@@ -306,7 +308,6 @@ static int iso_connect_bis(struct sock *sk)
 	}
 
 	release_sock(sk);
-	return err;
 
 unlock:
 	hci_dev_unlock(hdev);

@@ -367,14 +368,13 @@ static int iso_connect_cis(struct sock *sk)
 		goto unlock;
 	}
 
-	hci_dev_unlock(hdev);
-	hci_dev_put(hdev);
+	lock_sock(sk);
 
 	err = iso_chan_add(conn, sk, NULL);
-	if (err)
-		return err;
-
-	lock_sock(sk);
+	if (err) {
+		release_sock(sk);
+		goto unlock;
+	}
 
 	/* Update source addr of the socket */
 	bacpy(&iso_pi(sk)->src, &hcon->src);

@@ -391,7 +391,6 @@ static int iso_connect_cis(struct sock *sk)
 	}
 
 	release_sock(sk);
-	return err;
 
 unlock:
 	hci_dev_unlock(hdev);

@@ -1036,8 +1035,8 @@ static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg,
 			    size_t len)
 {
 	struct sock *sk = sock->sk;
-	struct iso_conn *conn = iso_pi(sk)->conn;
 	struct sk_buff *skb, **frag;
+	size_t mtu;
 	int err;
 
 	BT_DBG("sock %p, sk %p", sock, sk);

@@ -1049,11 +1048,18 @@ static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg,
 	if (msg->msg_flags & MSG_OOB)
 		return -EOPNOTSUPP;
 
-	if (sk->sk_state != BT_CONNECTED)
+	lock_sock(sk);
+
+	if (sk->sk_state != BT_CONNECTED) {
+		release_sock(sk);
 		return -ENOTCONN;
+	}
+
+	mtu = iso_pi(sk)->conn->hcon->hdev->iso_mtu;
+
+	release_sock(sk);
 
-	skb = bt_skb_sendmsg(sk, msg, len, conn->hcon->hdev->iso_mtu,
-			     HCI_ISO_DATA_HDR_SIZE, 0);
+	skb = bt_skb_sendmsg(sk, msg, len, mtu, HCI_ISO_DATA_HDR_SIZE, 0);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);
 

@@ -1066,8 +1072,7 @@ static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg,
 	while (len) {
 		struct sk_buff *tmp;
 
-		tmp = bt_skb_sendmsg(sk, msg, len, conn->hcon->hdev->iso_mtu,
-				     0, 0);
+		tmp = bt_skb_sendmsg(sk, msg, len, mtu, 0, 0);
 		if (IS_ERR(tmp)) {
 			kfree_skb(skb);
 			return PTR_ERR(tmp);

@@ -1122,15 +1127,19 @@ static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg,
 	BT_DBG("sk %p", sk);
 
 	if (test_and_clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
+		lock_sock(sk);
 		switch (sk->sk_state) {
 		case BT_CONNECT2:
-			lock_sock(sk);
 			iso_conn_defer_accept(pi->conn->hcon);
 			sk->sk_state = BT_CONFIG;
 			release_sock(sk);
 			return 0;
 		case BT_CONNECT:
+			release_sock(sk);
 			return iso_connect_cis(sk);
+		default:
+			release_sock(sk);
+			break;
 		}
 	}
 

index be0e6865b340f..d034bf2a999e1 100644
@@ -1972,6 +1972,7 @@ static int hci_remove_adv_monitor(struct hci_dev *hdev,
 				  struct adv_monitor *monitor)
 {
 	int status = 0;
+	int handle;
 
 	switch (hci_get_adv_monitor_offload_ext(hdev)) {
 	case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */

@@ -1980,9 +1981,10 @@ static int hci_remove_adv_monitor(struct hci_dev *hdev,
 		goto free_monitor;
 
 	case HCI_ADV_MONITOR_EXT_MSFT:
+		handle = monitor->handle;
 		status = msft_remove_monitor(hdev, monitor);
 		bt_dev_dbg(hdev, "%s remove monitor %d msft status %d",
-			   hdev->name, monitor->handle, status);
+			   hdev->name, handle, status);
 		break;
 	}
 

index 0bd0be3c63d22..5e4bc80dc0ae5 100644
@@ -3780,7 +3780,7 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 	case TCP_TX_DELAY:
 		if (val)
 			tcp_enable_tx_delay();
-		tp->tcp_tx_delay = val;
+		WRITE_ONCE(tp->tcp_tx_delay, val);
 		break;
 	default:
 		err = -ENOPROTOOPT;

@@ -4256,7 +4256,7 @@ int do_tcp_getsockopt(struct sock *sk, int level,
 		break;
 
 	case TCP_TX_DELAY:
-		val = tp->tcp_tx_delay;
+		val = READ_ONCE(tp->tcp_tx_delay);
 		break;
 
 	case TCP_TIMESTAMP:

index 5e4bc80dc0ae5..3edf7a1c5cbd2 100644
@@ -3762,7 +3762,7 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 		if (!tp->repair)
 			err = -EPERM;
 		else
-			tp->tsoffset = val - tcp_time_stamp_raw();
+			WRITE_ONCE(tp->tsoffset, val - tcp_time_stamp_raw());
 		break;
 	case TCP_REPAIR_WINDOW:
 		err = tcp_repair_set_window(tp, optval, optlen);

@@ -4260,7 +4260,7 @@ int do_tcp_getsockopt(struct sock *sk, int level,
 		break;
 
 	case TCP_TIMESTAMP:
-		val = tcp_time_stamp_raw() + tp->tsoffset;
+		val = tcp_time_stamp_raw() + READ_ONCE(tp->tsoffset);
 		break;
 	case TCP_NOTSENT_LOWAT:
 		val = tp->notsent_lowat;

index d49a66b271d52..9a8d59e9303a0 100644
@@ -307,8 +307,9 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 						  inet->inet_daddr,
 						  inet->inet_sport,
 						  usin->sin_port));
-		tp->tsoffset = secure_tcp_ts_off(net, inet->inet_saddr,
-						 inet->inet_daddr);
+		WRITE_ONCE(tp->tsoffset,
+			   secure_tcp_ts_off(net, inet->inet_saddr,
+					     inet->inet_daddr));
 	}
 
 	inet->inet_id = get_random_u16();

index 5eedd476a38d7..397c248102415 100644
@@ -1519,9 +1519,12 @@ static inline int keepalive_intvl_when(const struct tcp_sock *tp)
 static inline int keepalive_time_when(const struct tcp_sock *tp)
 {
 	struct net *net = sock_net((struct sock *)tp);
+	int val;
 
-	return tp->keepalive_time ? :
-		READ_ONCE(net->ipv4.sysctl_tcp_keepalive_time);
+	/* Paired with WRITE_ONCE() in tcp_sock_set_keepidle_locked() */
+	val = READ_ONCE(tp->keepalive_time);
+
+	return val ? : READ_ONCE(net->ipv4.sysctl_tcp_keepalive_time);
 }
 
 static inline int keepalive_probes(const struct tcp_sock *tp)

index 3edf7a1c5cbd2..c0d7b226bca1a 100644
@@ -3418,7 +3418,8 @@ int tcp_sock_set_keepidle_locked(struct sock *sk, int val)
 	if (val < 1 || val > MAX_TCP_KEEPIDLE)
 		return -EINVAL;
 
-	tp->keepalive_time = val * HZ;
+	/* Paired with WRITE_ONCE() in keepalive_time_when() */
+	WRITE_ONCE(tp->keepalive_time, val * HZ);
 	if (sock_flag(sk, SOCK_KEEPOPEN) &&
 	    !((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) {
 		u32 elapsed = keepalive_time_elapsed(tp);

index 397c248102415..f39c44cbdfe62 100644
@@ -1511,9 +1511,14 @@ void tcp_leave_memory_pressure(struct sock *sk);
 static inline int keepalive_intvl_when(const struct tcp_sock *tp)
 {
 	struct net *net = sock_net((struct sock *)tp);
+	int val;
+
+	/* Paired with WRITE_ONCE() in tcp_sock_set_keepintvl()
+	 * and do_tcp_setsockopt().
+	 */
+	val = READ_ONCE(tp->keepalive_intvl);
 
-	return tp->keepalive_intvl ? :
-		READ_ONCE(net->ipv4.sysctl_tcp_keepalive_intvl);
+	return val ? : READ_ONCE(net->ipv4.sysctl_tcp_keepalive_intvl);
 }
 
 static inline int keepalive_time_when(const struct tcp_sock *tp)

index c0d7b226bca1a..d19cfeb78392d 100644
@@ -3451,7 +3451,7 @@ int tcp_sock_set_keepintvl(struct sock *sk, int val)
 		return -EINVAL;
 
 	lock_sock(sk);
-	tcp_sk(sk)->keepalive_intvl = val * HZ;
+	WRITE_ONCE(tcp_sk(sk)->keepalive_intvl, val * HZ);
 	release_sock(sk);
 	return 0;
 }

@@ -3665,7 +3665,7 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 		if (val < 1 || val > MAX_TCP_KEEPINTVL)
 			err = -EINVAL;
 		else
-			tp->keepalive_intvl = val * HZ;
+			WRITE_ONCE(tp->keepalive_intvl, val * HZ);
 		break;
 	case TCP_KEEPCNT:
 		if (val < 1 || val > MAX_TCP_KEEPCNT)

index f39c44cbdfe62..9733d8e4f10af 100644
@@ -1535,9 +1535,14 @@ static inline int keepalive_time_when(const struct tcp_sock *tp)
 static inline int keepalive_probes(const struct tcp_sock *tp)
 {
 	struct net *net = sock_net((struct sock *)tp);
+	int val;
+
+	/* Paired with WRITE_ONCE() in tcp_sock_set_keepcnt()
+	 * and do_tcp_setsockopt().
+	 */
+	val = READ_ONCE(tp->keepalive_probes);
 
-	return tp->keepalive_probes ? :
-		READ_ONCE(net->ipv4.sysctl_tcp_keepalive_probes);
+	return val ? : READ_ONCE(net->ipv4.sysctl_tcp_keepalive_probes);
 }
 
 static inline u32 keepalive_time_elapsed(const struct tcp_sock *tp)

index d19cfeb78392d..7d75928ea0f9c 100644
@@ -3463,7 +3463,8 @@ int tcp_sock_set_keepcnt(struct sock *sk, int val)
 		return -EINVAL;
 
 	lock_sock(sk);
-	tcp_sk(sk)->keepalive_probes = val;
+	/* Paired with READ_ONCE() in keepalive_probes() */
+	WRITE_ONCE(tcp_sk(sk)->keepalive_probes, val);
 	release_sock(sk);
 	return 0;
 }

@@ -3671,7 +3672,7 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 		if (val < 1 || val > MAX_TCP_KEEPCNT)
 			err = -EINVAL;
 		else
-			tp->keepalive_probes = val;
+			WRITE_ONCE(tp->keepalive_probes, val);
 		break;
 	case TCP_SYNCNT:
 		if (val < 1 || val > MAX_TCP_SYNCNT)

index 8e35ea66d930a..62a3b103f258a 100644
@@ -1016,7 +1016,7 @@ static void reqsk_timer_handler(struct timer_list *t)
 
 	icsk = inet_csk(sk_listener);
 	net = sock_net(sk_listener);
-	max_syn_ack_retries = icsk->icsk_syn_retries ? :
+	max_syn_ack_retries = READ_ONCE(icsk->icsk_syn_retries) ? :
 		READ_ONCE(net->ipv4.sysctl_tcp_synack_retries);
 	/* Normally all the openreqs are young and become mature
 	 * (i.e. converted to established socket) for first timeout.

index 7d75928ea0f9c..ffa9717293358 100644
@@ -3397,7 +3397,7 @@ int tcp_sock_set_syncnt(struct sock *sk, int val)
 		return -EINVAL;
 
 	lock_sock(sk);
-	inet_csk(sk)->icsk_syn_retries = val;
+	WRITE_ONCE(inet_csk(sk)->icsk_syn_retries, val);
 	release_sock(sk);
 	return 0;
 }

@@ -3678,7 +3678,7 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 		if (val < 1 || val > MAX_TCP_SYNCNT)
 			err = -EINVAL;
 		else
-			icsk->icsk_syn_retries = val;
+			WRITE_ONCE(icsk->icsk_syn_retries, val);
 		break;
 
 	case TCP_SAVE_SYN:

@@ -4095,7 +4095,7 @@ int do_tcp_getsockopt(struct sock *sk, int level,
 		val = keepalive_probes(tp);
 		break;
 	case TCP_SYNCNT:
-		val = icsk->icsk_syn_retries ? :
+		val = READ_ONCE(icsk->icsk_syn_retries) ? :
 			READ_ONCE(net->ipv4.sysctl_tcp_syn_retries);
 		break;
 	case TCP_LINGER2:

index ffa9717293358..363535b6ece83 100644
@@ -3691,11 +3691,11 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 
 	case TCP_LINGER2:
 		if (val < 0)
-			tp->linger2 = -1;
+			WRITE_ONCE(tp->linger2, -1);
 		else if (val > TCP_FIN_TIMEOUT_MAX / HZ)
-			tp->linger2 = TCP_FIN_TIMEOUT_MAX;
+			WRITE_ONCE(tp->linger2, TCP_FIN_TIMEOUT_MAX);
 		else
-			tp->linger2 = val * HZ;
+			WRITE_ONCE(tp->linger2, val * HZ);
 		break;
 
 	case TCP_DEFER_ACCEPT:

@@ -4099,7 +4099,7 @@ int do_tcp_getsockopt(struct sock *sk, int level,
 			READ_ONCE(net->ipv4.sysctl_tcp_syn_retries);
 		break;
 	case TCP_LINGER2:
-		val = tp->linger2;
+		val = READ_ONCE(tp->linger2);
 		if (val >= 0)
 			val = (val ? : READ_ONCE(net->ipv4.sysctl_tcp_fin_timeout)) / HZ;
 		break;

index 363535b6ece83..bc3ad48f92389 100644
@@ -3700,9 +3700,9 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 
 	case TCP_DEFER_ACCEPT:
 		/* Translate value in seconds to number of retransmits */
-		icsk->icsk_accept_queue.rskq_defer_accept =
-			secs_to_retrans(val, TCP_TIMEOUT_INIT / HZ,
-					TCP_RTO_MAX / HZ);
+		WRITE_ONCE(icsk->icsk_accept_queue.rskq_defer_accept,
+			   secs_to_retrans(val, TCP_TIMEOUT_INIT / HZ,
+					   TCP_RTO_MAX / HZ));
 		break;
 
 	case TCP_WINDOW_CLAMP:

@@ -4104,8 +4104,9 @@ int do_tcp_getsockopt(struct sock *sk, int level,
 			val = (val ? : READ_ONCE(net->ipv4.sysctl_tcp_fin_timeout)) / HZ;
 		break;
 	case TCP_DEFER_ACCEPT:
-		val = retrans_to_secs(icsk->icsk_accept_queue.rskq_defer_accept,
-				      TCP_TIMEOUT_INIT / HZ, TCP_RTO_MAX / HZ);
+		val = READ_ONCE(icsk->icsk_accept_queue.rskq_defer_accept);
+		val = retrans_to_secs(val, TCP_TIMEOUT_INIT / HZ,
+				      TCP_RTO_MAX / HZ);
 		break;
 	case TCP_WINDOW_CLAMP:
 		val = tp->window_clamp;

index 9733d8e4f10af..e9c8f88f47696 100644
@@ -2059,7 +2059,11 @@ void __tcp_v4_send_check(struct sk_buff *skb, __be32 saddr, __be32 daddr);
 static inline u32 tcp_notsent_lowat(const struct tcp_sock *tp)
 {
 	struct net *net = sock_net((struct sock *)tp);
-	return tp->notsent_lowat ?: READ_ONCE(net->ipv4.sysctl_tcp_notsent_lowat);
+	u32 val;
+
+	val = READ_ONCE(tp->notsent_lowat);
+
+	return val ?: READ_ONCE(net->ipv4.sysctl_tcp_notsent_lowat);
 }
 
 bool tcp_stream_memory_free(const struct sock *sk, int wake);

index bc3ad48f92389..6f3a494b965ae 100644
@@ -3770,7 +3770,7 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 		err = tcp_repair_set_window(tp, optval, optlen);
 		break;
 	case TCP_NOTSENT_LOWAT:
-		tp->notsent_lowat = val;
+		WRITE_ONCE(tp->notsent_lowat, val);
 		sk->sk_write_space(sk);
 		break;
 	case TCP_INQ:

@@ -4266,7 +4266,7 @@ int do_tcp_getsockopt(struct sock *sk, int level,
 		val = tcp_time_stamp_raw() + READ_ONCE(tp->tsoffset);
 		break;
 	case TCP_NOTSENT_LOWAT:
-		val = tp->notsent_lowat;
+		val = READ_ONCE(tp->notsent_lowat);
 		break;
 	case TCP_INQ:
 		val = tp->recvmsg_inq;

index 6f3a494b965ae..b3a5ff311567b 100644
@@ -3406,7 +3406,7 @@ EXPORT_SYMBOL(tcp_sock_set_syncnt);
 void tcp_sock_set_user_timeout(struct sock *sk, u32 val)
 {
 	lock_sock(sk);
-	inet_csk(sk)->icsk_user_timeout = val;
+	WRITE_ONCE(inet_csk(sk)->icsk_user_timeout, val);
 	release_sock(sk);
 }
 EXPORT_SYMBOL(tcp_sock_set_user_timeout);

@@ -3726,7 +3726,7 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
 		if (val < 0)
 			err = -EINVAL;
 		else
-			icsk->icsk_user_timeout = val;
+			WRITE_ONCE(icsk->icsk_user_timeout, val);
 		break;
 
 	case TCP_FASTOPEN:

@@ -4243,7 +4243,7 @@ int do_tcp_getsockopt(struct sock *sk, int level,
 		break;
 
 	case TCP_USER_TIMEOUT:
-		val = icsk->icsk_user_timeout;
+		val = READ_ONCE(icsk->icsk_user_timeout);
 		break;
 
 	case TCP_FASTOPEN:

index 41b1da621a458..9cd289ad3f5b5 100644
@@ -510,7 +510,7 @@ static inline void fastopen_queue_tune(struct sock *sk, int backlog)
 	struct request_sock_queue *queue = &inet_csk(sk)->icsk_accept_queue;
 	int somaxconn = READ_ONCE(sock_net(sk)->core.sysctl_somaxconn);
 
-	queue->fastopenq.max_qlen = min_t(unsigned int, backlog, somaxconn);
+	WRITE_ONCE(queue->fastopenq.max_qlen, min_t(unsigned int, backlog, somaxconn));
 }
 
 static inline void tcp_move_syn(struct tcp_sock *tp,

index b3a5ff311567b..fab25d4f3a6f1 100644
@@ -4247,7 +4247,7 @@ int do_tcp_getsockopt(struct sock *sk, int level,
 		break;
 
 	case TCP_FASTOPEN:
-		val = icsk->icsk_accept_queue.fastopenq.max_qlen;
+		val = READ_ONCE(icsk->icsk_accept_queue.fastopenq.max_qlen);
 		break;
 
 	case TCP_FASTOPEN_CONNECT:

index 45cc7f1ca2961..85e4953f11821 100644
@@ -296,6 +296,7 @@ static struct sock *tcp_fastopen_create_child(struct sock *sk,
 static bool tcp_fastopen_queue_check(struct sock *sk)
 {
 	struct fastopen_queue *fastopenq;
+	int max_qlen;
 
 	/* Make sure the listener has enabled fastopen, and we don't
 	 * exceed the max # of pending TFO requests allowed before trying

@@ -308,10 +309,11 @@ static bool tcp_fastopen_queue_check(struct sock *sk)
 	 * temporarily vs a server not supporting Fast Open at all.
 	 */
 	fastopenq = &inet_csk(sk)->icsk_accept_queue.fastopenq;
-	if (fastopenq->max_qlen == 0)
+	max_qlen = READ_ONCE(fastopenq->max_qlen);
+	if (max_qlen == 0)
 		return false;
 
-	if (fastopenq->qlen >= fastopenq->max_qlen) {
+	if (fastopenq->qlen >= max_qlen) {
 		struct request_sock *req1;
 		spin_lock(&fastopenq->lock);
 		req1 = fastopenq->rskq_rst_head;

index 7fbb0904b3c0f..82f74f96eba29 100644
@@ -3252,23 +3252,30 @@ static int __init phy_init(void)
 {
 	int rc;
 
+	ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops);
+
 	rc = mdio_bus_init();
 	if (rc)
-		return rc;
+		goto err_ethtool_phy_ops;
 
-	ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops);
 	features_init();
 
 	rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
 	if (rc)
-		goto err_c45;
+		goto err_mdio_bus;
 
 	rc = phy_driver_register(&genphy_driver, THIS_MODULE);
-	if (rc) {
-		phy_driver_unregister(&genphy_c45_driver);
+	if (rc)
+		goto err_c45;
+
+	return 0;
+
 err_c45:
-		mdio_bus_exit();
-	}
+	phy_driver_unregister(&genphy_c45_driver);
+err_mdio_bus:
+	mdio_bus_exit();
+err_ethtool_phy_ops:
+	ethtool_set_ethtool_phy_ops(NULL);
 
 	return rc;
 }

@@ -58,28 +58,6 @@ static inline void __buffer_unlink(struc
 }
 
 /*
- * Move a buffer from the checkpoint list to the checkpoint io list
- *
- * Called with j_list_lock held
- */
-static inline void __buffer_relink_io(struct journal_head *jh)
-{
-	transaction_t *transaction = jh->b_cp_transaction;
-
-	__buffer_unlink_first(jh);
-
-	if (!transaction->t_checkpoint_io_list) {
-		jh->b_cpnext = jh->b_cpprev = jh;
-	} else {
-		jh->b_cpnext = transaction->t_checkpoint_io_list;
-		jh->b_cpprev = transaction->t_checkpoint_io_list->b_cpprev;
-		jh->b_cpprev->b_cpnext = jh;
-		jh->b_cpnext->b_cpprev = jh;
-	}
-	transaction->t_checkpoint_io_list = jh;
-}
-
-/*
  * Check a checkpoint buffer could be release or not.
  *
  * Requires j_list_lock

@@ -183,6 +161,7 @@ __flush_batch(journal_t *journal, int *b
 		struct buffer_head *bh = journal->j_chkpt_bhs[i];
 		BUFFER_TRACE(bh, "brelse");
 		__brelse(bh);
+		journal->j_chkpt_bhs[i] = NULL;
 	}
 	*batch_count = 0;
 }

@@ -242,6 +221,11 @@ restart:
 		jh = transaction->t_checkpoint_list;
 		bh = jh2bh(jh);
 
+		/*
+		 * The buffer may be writing back, or flushing out in the
+		 * last couple of cycles, or re-adding into a new transaction,
+		 * need to check it again until it's unlocked.
+		 */
 		if (buffer_locked(bh)) {
 			get_bh(bh);
 			spin_unlock(&journal->j_list_lock);

@@ -287,28 +271,32 @@ restart:
 		}
 		if (!buffer_dirty(bh)) {
 			BUFFER_TRACE(bh, "remove from checkpoint");
-			if (__jbd2_journal_remove_checkpoint(jh))
-				/* The transaction was released; we're done */
+			/*
+			 * If the transaction was released or the checkpoint
+			 * list was empty, we're done.
+			 */
+			if (__jbd2_journal_remove_checkpoint(jh) ||
+			    !transaction->t_checkpoint_list)
 				goto out;
-			continue;
+		} else {
+			/*
+			 * We are about to write the buffer, it could be
+			 * raced by some other transaction shrink or buffer
+			 * re-log logic once we release the j_list_lock,
+			 * leave it on the checkpoint list and check status
+			 * again to make sure it's clean.
+			 */
+			BUFFER_TRACE(bh, "queue");
+			get_bh(bh);
+			J_ASSERT_BH(bh, !buffer_jwrite(bh));
+			journal->j_chkpt_bhs[batch_count++] = bh;
+			transaction->t_chp_stats.cs_written++;
+			transaction->t_checkpoint_list = jh->b_cpnext;
 		}
-		/*
-		 * Important: we are about to write the buffer, and
-		 * possibly block, while still holding the journal
-		 * lock.  We cannot afford to let the transaction
-		 * logic start messing around with this buffer before
-		 * we write it to disk, as that would break
-		 * recoverability.
-		 */
-		BUFFER_TRACE(bh, "queue");
-		get_bh(bh);
-		J_ASSERT_BH(bh, !buffer_jwrite(bh));
-		journal->j_chkpt_bhs[batch_count++] = bh;
-		__buffer_relink_io(jh);
-		transaction->t_chp_stats.cs_written++;
+
 		if ((batch_count == JBD2_NR_BATCH) ||
-		    need_resched() ||
-		    spin_needbreak(&journal->j_list_lock))
+		    need_resched() || spin_needbreak(&journal->j_list_lock) ||
+		    jh2bh(transaction->t_checkpoint_list) == journal->j_chkpt_bhs[0])
 			goto unlock_and_flush;
 	}
 

@@ -322,38 +310,6 @@ restart:
 			goto restart;
 	}
 
-	/*
-	 * Now we issued all of the transaction's buffers, let's deal
-	 * with the buffers that are out for I/O.
-	 */
-restart2:
-	/* Did somebody clean up the transaction in the meanwhile? */
-	if (journal->j_checkpoint_transactions != transaction ||
-	    transaction->t_tid != this_tid)
-		goto out;
-
-	while (transaction->t_checkpoint_io_list) {
-		jh = transaction->t_checkpoint_io_list;
-		bh = jh2bh(jh);
-		if (buffer_locked(bh)) {
-			get_bh(bh);
-			spin_unlock(&journal->j_list_lock);
-			wait_on_buffer(bh);
-			/* the journal_head may have gone by now */
-			BUFFER_TRACE(bh, "brelse");
-			__brelse(bh);
-			spin_lock(&journal->j_list_lock);
-			goto restart2;
-		}
-
-		/*
-		 * Now in whatever state the buffer currently is, we
-		 * know that it has been written out and so we can
-		 * drop it from the list
-		 */
-		if (__jbd2_journal_remove_checkpoint(jh))
-			break;
-	}
 out:
 	spin_unlock(&journal->j_list_lock);
 	result = jbd2_cleanup_journal_tail(journal);

@@ -6560,7 +6560,8 @@ static int event_hist_trigger_parse(stru
 		goto out_unreg;
 
 	if (has_hist_vars(hist_data) || hist_data->n_var_refs) {
-		if (save_hist_vars(hist_data))
+		ret = save_hist_vars(hist_data);
+		if (ret)
 			goto out_unreg;
 	}
 

@@ -85,6 +85,8 @@ static void ttm_lru_bulk_move_pos_tail(s
 				       struct ttm_resource *res)
 {
 	if (pos->last != res) {
+		if (pos->first == res)
+			pos->first = list_next_entry(res, lru);
 		list_move(&res->lru, &pos->last->lru);
 		pos->last = res;
 	}

@@ -110,7 +112,8 @@ static void ttm_lru_bulk_move_del(struct
 {
 	struct ttm_lru_bulk_move_pos *pos = ttm_lru_bulk_move_pos(bulk, res);
 
-	if (unlikely(pos->first == res && pos->last == res)) {
+	if (unlikely(WARN_ON(!pos->first || !pos->last) ||
+		     (pos->first == res && pos->last == res))) {
 		pos->first = NULL;
 		pos->last = NULL;
 	} else if (pos->first == res) {

@@ -223,14 +223,7 @@ static int dw_spi_intel_init(struct plat
 }
 
 /*
- * The Intel Mount Evans SoC's Integrated Management Complex uses the
- * SPI controller for access to a NOR SPI FLASH. However, the SoC doesn't
- * provide a mechanism to override the native chip select signal.
- *
- * This driver doesn't use DMA for memory operations when a chip select
- * override is not provided due to the native chip select timing behavior.
- * As a result no DMA configuration is done for the controller and this
- * configuration is not tested.
+ * DMA-based mem ops are not configured for this device and are not tested.
  */
 static int dw_spi_mountevans_imc_init(struct platform_device *pdev,
 				      struct dw_spi_mmio *dwsmmio)

@@ -118,6 +118,7 @@ static bool is_ignored_symbol(const char
 		"kallsyms_markers",
 		"kallsyms_token_table",
 		"kallsyms_token_index",
+		"kallsyms_seqs_of_names",
 		/* Exclude linker generated symbols which vary between passes */
 		"_SDA_BASE_",		/* ppc */
 		"_SDA2_BASE_",		/* ppc */

@@ -5,7 +5,8 @@
  * This software may be used and distributed according to the terms
  * of the GNU General Public License, incorporated herein by reference.
  *
- * Usage: nm -n vmlinux | scripts/kallsyms [--all-symbols] > symbols.S
+ * Usage: kallsyms [--all-symbols] [--absolute-percpu]
+ *                         [--base-relative] in.map > out.S
  *
  *      Table compression uses all the unused char codes on the symbols and
  *  maps these to the most used substrings (tokens). For instance, it might

@@ -6,7 +6,7 @@
  * of the GNU General Public License, incorporated herein by reference.
  *
  * Usage: kallsyms [--all-symbols] [--absolute-percpu]
- *                         [--base-relative] in.map > out.S
+ *                         [--base-relative] [--lto-clang] in.map > out.S
  *
  *      Table compression uses all the unused char codes on the symbols and
  *  maps these to the most used substrings (tokens). For instance, it might

@@ -511,6 +511,15 @@ static bool is_dynptr_ref_function(enum
 	return func_id == BPF_FUNC_dynptr_data;
 }
 
+static bool is_callback_calling_function(enum bpf_func_id func_id)
+{
+	return func_id == BPF_FUNC_for_each_map_elem ||
+	       func_id == BPF_FUNC_timer_set_callback ||
+	       func_id == BPF_FUNC_find_vma ||
+	       func_id == BPF_FUNC_loop ||
+	       func_id == BPF_FUNC_user_ringbuf_drain;
+}
+
 static bool helper_multiple_ref_obj_use(enum bpf_func_id func_id,
 					const struct bpf_map *map)
 {

@@ -1693,7 +1702,7 @@ static void __mark_reg_unknown(const str
 	reg->type = SCALAR_VALUE;
 	reg->var_off = tnum_unknown;
 	reg->frameno = 0;
-	reg->precise = env->subprog_cnt > 1 || !env->bpf_capable;
+	reg->precise = !env->bpf_capable;
 	__mark_reg_unbounded(reg);
 }
 

@@ -2670,6 +2679,11 @@ static int backtrack_insn(struct bpf_ver
 			 */
 			if (insn->src_reg == BPF_PSEUDO_KFUNC_CALL && insn->imm == 0)
 				return -ENOTSUPP;
+			/* BPF helpers that invoke callback subprogs are
+			 * equivalent to BPF_PSEUDO_CALL above
+			 */
+			if (insn->src_reg == 0 && is_callback_calling_function(insn->imm))
+				return -ENOTSUPP;
 			/* regular helper call sets R0 */
 			*reg_mask &= ~1;
 			if (*reg_mask & 0x3f) {

@@ -2848,12 +2862,42 @@ static int __mark_chain_precision(struct
 		return 0;
 	if (!reg_mask && !stack_mask)
 		return 0;
+
 	for (;;) {
 		DECLARE_BITMAP(mask, 64);
 		u32 history = st->jmp_history_cnt;
 
 		if (env->log.level & BPF_LOG_LEVEL2)
 			verbose(env, "last_idx %d first_idx %d\n", last_idx, first_idx);
+
+		if (last_idx < 0) {
+			/* we are at the entry into subprog, which
+			 * is expected for global funcs, but only if
+			 * requested precise registers are R1-R5
+			 * (which are global func's input arguments)
+			 */
+			if (st->curframe == 0 &&
+			    st->frame[0]->subprogno > 0 &&
+			    st->frame[0]->callsite == BPF_MAIN_FUNC &&
+			    stack_mask == 0 && (reg_mask & ~0x3e) == 0) {
+				bitmap_from_u64(mask, reg_mask);
+				for_each_set_bit(i, mask, 32) {
+					reg = &st->frame[0]->regs[i];
+					if (reg->type != SCALAR_VALUE) {
+						reg_mask &= ~(1u << i);
+						continue;
+					}
+					reg->precise = true;
+				}
+				return 0;
+			}
+
+			verbose(env, "BUG backtracing func entry subprog %d reg_mask %x stack_mask %llx\n",
+				st->frame[0]->subprogno, reg_mask, stack_mask);
+			WARN_ONCE(1, "verifier backtracking bug");
+			return -EFAULT;
+		}
+
 		for (i = last_idx;;) {
 			if (skip_first) {
 				err = 0;

@@ -6732,6 +6776,10 @@ typedef int (*set_callee_state_fn)(struc
 				   struct bpf_func_state *callee,
 				   int insn_idx);
 
+static int set_callee_state(struct bpf_verifier_env *env,
+			    struct bpf_func_state *caller,
+			    struct bpf_func_state *callee, int insn_idx);
+
 static int __check_func_call(struct bpf_verifier_env *env, struct bpf_insn *insn,
 			     int *insn_idx, int subprog,
 			     set_callee_state_fn set_callee_state_cb)

@@ -6782,6 +6830,16 @@ static int __check_func_call(struct bpf_
 		}
 	}
 
+	/* set_callee_state is used for direct subprog calls, but we are
+	 * interested in validating only BPF helpers that can call subprogs as
+	 * callbacks
+	 */
+	if (set_callee_state_cb != set_callee_state && !is_callback_calling_function(insn->imm)) {
+		verbose(env, "verifier bug: helper %s#%d is not marked as callback-calling\n",
+			func_id_name(insn->imm), insn->imm);
+		return -EFAULT;
+	}
+
 	if (insn->code == (BPF_JMP | BPF_CALL) &&
 	    insn->src_reg == 0 &&
 	    insn->imm == BPF_FUNC_timer_set_callback) {

@@ -14713,6 +14771,8 @@ static int do_check_common(struct bpf_ve
 			BPF_MAIN_FUNC /* callsite */,
 			0 /* frameno */,
 			subprog);
+	state->first_insn_idx = env->subprog_info[subprog].start;
+	state->last_insn_idx = -1;
 
 	regs = state->frame[state->curframe]->regs;
 	if (subprog || env->prog->type == BPF_PROG_TYPE_EXT) {

@@ -2788,8 +2788,11 @@ static void mark_all_scalars_precise(str
 
 	/* big hammer: mark all scalars precise in this path.
 	 * pop_stack may still get !precise scalars.
+	 * We also skip current state and go straight to first parent state,
+	 * because precision markings in current non-checkpointed state are
+	 * not needed. See why in the comment in __mark_chain_precision below.
 	 */
-	for (; st; st = st->parent)
+	for (st = st->parent; st; st = st->parent) {
 		for (i = 0; i <= st->curframe; i++) {
 			func = st->frame[i];
 			for (j = 0; j < BPF_REG_FP; j++) {

@@ -2807,8 +2810,88 @@ static void mark_all_scalars_precise(str
 				reg->precise = true;
 			}
 		}
+	}
 }
 
+/*
+ * __mark_chain_precision() backtracks BPF program instruction sequence and
+ * chain of verifier states making sure that register *regno* (if regno >= 0)
+ * and/or stack slot *spi* (if spi >= 0) are marked as precisely tracked
+ * SCALARS, as well as any other registers and slots that contribute to
+ * a tracked state of given registers/stack slots, depending on specific BPF
+ * assembly instructions (see backtrack_insns() for exact instruction handling
+ * logic). This backtracking relies on recorded jmp_history and is able to
+ * traverse entire chain of parent states. This process ends only when all the
+ * necessary registers/slots and their transitive dependencies are marked as
+ * precise.
+ *
+ * One important and subtle aspect is that precise marks *do not matter* in
+ * the currently verified state (current state). It is important to understand
+ * why this is the case.
+ *
+ * First, note that current state is the state that is not yet "checkpointed",
+ * i.e., it is not yet put into env->explored_states, and it has no children
+ * states as well. It's ephemeral, and can end up either a) being discarded if
+ * compatible explored state is found at some point or BPF_EXIT instruction is
+ * reached or b) checkpointed and put into env->explored_states, branching out
+ * into one or more children states.
+ *
+ * In the former case, precise markings in current state are completely
+ * ignored by state comparison code (see regsafe() for details). Only
+ * checkpointed ("old") state precise markings are important, and if old
+ * state's register/slot is precise, regsafe() assumes current state's
+ * register/slot as precise and checks value ranges exactly and precisely. If
+ * states turn out to be compatible, current state's necessary precise
+ * markings and any required parent states' precise markings are enforced
+ * after the fact with propagate_precision() logic, after the fact. But it's
+ * important to realize that in this case, even after marking current state
+ * registers/slots as precise, we immediately discard current state. So what
+ * actually matters is any of the precise markings propagated into current
+ * state's parent states, which are always checkpointed (due to b) case above).
+ * As such, for scenario a) it doesn't matter if current state has precise
+ * markings set or not.
+ *
+ * Now, for the scenario b), checkpointing and forking into child(ren)
+ * state(s). Note that before current state gets to checkpointing step, any
+ * processed instruction always assumes precise SCALAR register/slot
+ * knowledge: if precise value or range is useful to prune jump branch, BPF
+ * verifier takes this opportunity enthusiastically. Similarly, when
+ * register's value is used to calculate offset or memory address, exact
+ * knowledge of SCALAR range is assumed, checked, and enforced. So, similar to
+ * what we mentioned above about state comparison ignoring precise markings
+ * during state comparison, BPF verifier ignores and also assumes precise
+ * markings *at will* during instruction verification process. But as verifier
+ * assumes precision, it also propagates any precision dependencies across
+ * parent states, which are not yet finalized, so can be further restricted
+ * based on new knowledge gained from restrictions enforced by their children
+ * states. This is so that once those parent states are finalized, i.e., when
+ * they have no more active children state, state comparison logic in
+ * is_state_visited() would enforce strict and precise SCALAR ranges, if
+ * required for correctness.
+ *
+ * To build a bit more intuition, note also that once a state is checkpointed,
+ * the path we took to get to that state is not important. This is crucial
+ * property for state pruning. When state is checkpointed and finalized at
+ * some instruction index, it can be correctly and safely used to "short
+ * circuit" any *compatible* state that reaches exactly the same instruction
+ * index. I.e., if we jumped to that instruction from a completely different
+ * code path than original finalized state was derived from, it doesn't
+ * matter, current state can be discarded because from that instruction
+ * forward having a compatible state will ensure we will safely reach the
+ * exit. States describe preconditions for further exploration, but completely
+ * forget the history of how we got here.
+ *
+ * This also means that even if we needed precise SCALAR range to get to
+ * finalized state, but from that point forward *that same* SCALAR register is
+ * never used in a precise context (i.e., it's precise value is not needed for
+ * correctness), it's correct and safe to mark such register as "imprecise"
+ * (i.e., precise marking set to false). This is what we rely on when we do
+ * not set precise marking in current state. If no child state requires
+ * precision for any given SCALAR register, it's safe to dictate that it can
+ * be imprecise. If any child state does require this register to be precise,
+ * we'll mark it precise later retroactively during precise markings
+ * propagation from child state to parent states.
+ */
 static int __mark_chain_precision(struct bpf_verifier_env *env, int frame, int regno,
 				  int spi)
 {

@@ -2826,6 +2909,10 @@ static int __mark_chain_precision(struct
 	if (!env->bpf_capable)
 		return 0;
 
+	/* Do sanity checks against current state of register and/or stack
+	 * slot, but don't set precise flag in current state, as precision
+	 * tracking in the current state is unnecessary.
+	 */
 	func = st->frame[frame];
 	if (regno >= 0) {
 		reg = &func->regs[regno];

@@ -2833,11 +2920,7 @@ static int __mark_chain_precision(struct
 			WARN_ONCE(1, "backtracing misuse");
 			return -EFAULT;
 		}
-		if (!reg->precise)
-			new_marks = true;
-		else
-			reg_mask = 0;
-		reg->precise = true;
+		new_marks = true;
 	}
 
 	while (spi >= 0) {

@@ -2850,11 +2933,7 @@ static int __mark_chain_precision(struct
 			stack_mask = 0;
 			break;
 		}
-		if (!reg->precise)
-			new_marks = true;
-		else
-			stack_mask = 0;
-		reg->precise = true;
+		new_marks = true;
 		break;
 	}
 

@@ -11668,7 +11747,7 @@ static bool regsafe(struct bpf_verifier_
 		if (env->explore_alu_limits)
 			return false;
 		if (rcur->type == SCALAR_VALUE) {
-			if (!rold->precise && !rcur->precise)
+			if (!rold->precise)
 				return true;
 			/* new val must satisfy old val knowledge */
 			return range_within(rold, rcur) &&

@@ -2813,6 +2813,31 @@ static void mark_all_scalars_precise(str
 	}
 }
 
+static void mark_all_scalars_imprecise(struct bpf_verifier_env *env, struct bpf_verifier_state *st)
+{
+	struct bpf_func_state *func;
+	struct bpf_reg_state *reg;
+	int i, j;
+
+	for (i = 0; i <= st->curframe; i++) {
+		func = st->frame[i];
+		for (j = 0; j < BPF_REG_FP; j++) {
+			reg = &func->regs[j];
+			if (reg->type != SCALAR_VALUE)
+				continue;
+			reg->precise = false;
+		}
+		for (j = 0; j < func->allocated_stack / BPF_REG_SIZE; j++) {
+			if (!is_spilled_reg(&func->stack[j]))
+				continue;
+			reg = &func->stack[j].spilled_ptr;
+			if (reg->type != SCALAR_VALUE)
+				continue;
+			reg->precise = false;
+		}
+	}
+}
+
 /*
  * __mark_chain_precision() backtracks BPF program instruction sequence and
  * chain of verifier states making sure that register *regno* (if regno >= 0)

@@ -2891,6 +2916,14 @@ static void mark_all_scalars_precise(str
  * be imprecise. If any child state does require this register to be precise,
  * we'll mark it precise later retroactively during precise markings
  * propagation from child state to parent states.
+ *
+ * Skipping precise marking setting in current state is a mild version of
+ * relying on the above observation. But we can utilize this property even
+ * more aggressively by proactively forgetting any precise marking in the
+ * current state (which we inherited from the parent state), right before we
+ * checkpoint it and branch off into new child state. This is done by
+ * mark_all_scalars_imprecise() to hopefully get more permissive and generic
+ * finalized states which help in short circuiting more future states.
  */
 static int __mark_chain_precision(struct bpf_verifier_env *env, int frame, int regno,
 				  int spi)

@@ -12296,6 +12329,10 @@ next:
 	env->prev_jmps_processed = env->jmps_processed;
 	env->prev_insn_processed = env->insn_processed;
 
+	/* forget precise markings we inherited, see __mark_chain_precision */
+	if (env->bpf_capable)
+		mark_all_scalars_imprecise(env, cur);
+
 	/* add new state to the head of linked list */
 	new = &new_sl->state;
 	err = copy_verifier_state(new, cur);

@@ -2,7 +2,7 @@
 #include <test_progs.h>
 
 #define MAX_INSNS	512
-#define MAX_MATCHES	16
+#define MAX_MATCHES	24
 
 struct bpf_reg_match {
 	unsigned int line;

@@ -267,6 +267,7 @@ static struct bpf_align_test tests[] = {
 			 */
 			BPF_MOV64_REG(BPF_REG_5, BPF_REG_2),
 			BPF_ALU64_REG(BPF_ADD, BPF_REG_5, BPF_REG_6),
+			BPF_MOV64_REG(BPF_REG_4, BPF_REG_5),
 			BPF_ALU64_IMM(BPF_ADD, BPF_REG_5, 14),
 			BPF_MOV64_REG(BPF_REG_4, BPF_REG_5),
 			BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, 4),

@@ -280,6 +281,7 @@ static struct bpf_align_test tests[] = {
 			BPF_MOV64_REG(BPF_REG_5, BPF_REG_2),
 			BPF_ALU64_IMM(BPF_ADD, BPF_REG_5, 14),
 			BPF_ALU64_REG(BPF_ADD, BPF_REG_5, BPF_REG_6),
+			BPF_MOV64_REG(BPF_REG_4, BPF_REG_5),
 			BPF_ALU64_IMM(BPF_ADD, BPF_REG_5, 4),
 			BPF_ALU64_REG(BPF_ADD, BPF_REG_5, BPF_REG_6),
 			BPF_MOV64_REG(BPF_REG_4, BPF_REG_5),

@@ -311,44 +313,52 @@ static struct bpf_align_test tests[] = {
 			{15, "R4=pkt(id=1,off=18,r=18,umax=1020,var_off=(0x0; 0x3fc))"},
 			{15, "R5=pkt(id=1,off=14,r=18,umax=1020,var_off=(0x0; 0x3fc))"},
 			/* Variable offset is added to R5 packet pointer,
-			 * resulting in auxiliary alignment of 4.
+			 * resulting in auxiliary alignment of 4. To avoid BPF
+			 * verifier's precision backtracking logging
+			 * interfering we also have a no-op R4 = R5
+			 * instruction to validate R5 state. We also check
+			 * that R4 is what it should be in such case.
 			 */
-			{17, "R5_w=pkt(id=2,off=0,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
+			{18, "R4_w=pkt(id=2,off=0,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
+			{18, "R5_w=pkt(id=2,off=0,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
 			/* Constant offset is added to R5, resulting in
 			 * reg->off of 14.
 			 */
-			{18, "R5_w=pkt(id=2,off=14,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
+			{19, "R5_w=pkt(id=2,off=14,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
 			/* At the time the word size load is performed from R5,
 			 * its total fixed offset is NET_IP_ALIGN + reg->off
 			 * (14) which is 16.  Then the variable offset is 4-byte
 			 * aligned, so the total offset is 4-byte aligned and
 			 * meets the load's requirements.
 			 */
-			{23, "R4=pkt(id=2,off=18,r=18,umax=1020,var_off=(0x0; 0x3fc))"},
-			{23, "R5=pkt(id=2,off=14,r=18,umax=1020,var_off=(0x0; 0x3fc))"},
+			{24, "R4=pkt(id=2,off=18,r=18,umax=1020,var_off=(0x0; 0x3fc))"},
+			{24, "R5=pkt(id=2,off=14,r=18,umax=1020,var_off=(0x0; 0x3fc))"},
 			/* Constant offset is added to R5 packet pointer,
 			 * resulting in reg->off value of 14.
 			 */
-			{25, "R5_w=pkt(off=14,r=8"},
+			{26, "R5_w=pkt(off=14,r=8"},
 			/* Variable offset is added to R5, resulting in a
-			 * variable offset of (4n).
+			 * variable offset of (4n). See comment for insn #18
+			 * for R4 = R5 trick.
 			 */
-			{26, "R5_w=pkt(id=3,off=14,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
+			{28, "R4_w=pkt(id=3,off=14,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
+			{28, "R5_w=pkt(id=3,off=14,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
 			/* Constant is added to R5 again, setting reg->off to 18. */
-			{27, "R5_w=pkt(id=3,off=18,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
+			{29, "R5_w=pkt(id=3,off=18,r=0,umax=1020,var_off=(0x0; 0x3fc))"},
 			/* And once more we add a variable; resulting var_off
 			 * is still (4n), fixed offset is not changed.
 			 * Also, we create a new reg->id.
 			 */
-			{28, "R5_w=pkt(id=4,off=18,r=0,umax=2040,var_off=(0x0; 0x7fc)"},
+			{31, "R4_w=pkt(id=4,off=18,r=0,umax=2040,var_off=(0x0; 0x7fc)"},
+			{31, "R5_w=pkt(id=4,off=18,r=0,umax=2040,var_off=(0x0; 0x7fc)"},
 			/* At the time the word size load is performed from R5,
 			 * its total fixed offset is NET_IP_ALIGN + reg->off (18)
 			 * which is 20.  Then the variable offset is (4n), so
 			 * the total offset is 4-byte aligned and meets the
 			 * load's requirements.
 			 */
-			{33, "R4=pkt(id=4,off=22,r=22,umax=2040,var_off=(0x0; 0x7fc)"},
-			{33, "R5=pkt(id=4,off=18,r=22,umax=2040,var_off=(0x0; 0x7fc)"},
+			{35, "R4=pkt(id=4,off=22,r=22,umax=2040,var_off=(0x0; 0x7fc)"},
+			{35, "R5=pkt(id=4,off=18,r=22,umax=2040,var_off=(0x0; 0x7fc)"},
 		},
 	},
 	{

@@ -681,6 +691,6 @@ void test_align(void)
 		if (!test__start_subtest(test->descr))
 			continue;
 
-		CHECK_FAIL(do_test_single(test));
+		ASSERT_OK(do_test_single(test), test->descr);
 	}
 }

@@ -32,7 +32,7 @@
 #define IFNAMSIZ 16
 #endif
 
-__attribute__ ((noinline))
+__attribute__ ((noinline)) __weak
 int do_bind(struct bpf_sock_addr *ctx)
 {
 	struct sockaddr_in sa = {};

@@ -29,7 +29,23 @@ static int stop, duration;
 static bool
 configure_stack(void)
 {
+	char tc_version[128];
 	char tc_cmd[BUFSIZ];
+	char *prog;
+	FILE *tc;
+
+	/* Check whether tc is built with libbpf. */
+	tc = popen("tc -V", "r");
+	if (CHECK_FAIL(!tc))
+		return false;
+	if (CHECK_FAIL(!fgets(tc_version, sizeof(tc_version), tc)))
+		return false;
+	if (strstr(tc_version, ", libbpf "))
+		prog = "test_sk_assign_libbpf.bpf.o";
+	else
+		prog = "test_sk_assign.bpf.o";
+	if (CHECK_FAIL(pclose(tc)))
+		return false;
 
 	/* Move to a new networking namespace */
 	if (CHECK_FAIL(unshare(CLONE_NEWNET)))

@@ -46,8 +62,8 @@ configure_stack(void)
 	/* Load qdisc, BPF program */
 	if (CHECK_FAIL(system("tc qdisc add dev lo clsact")))
 		return false;
-	sprintf(tc_cmd, "%s %s %s %s", "tc filter add dev lo ingress bpf",
-		       "direct-action object-file ./test_sk_assign.bpf.o",
+	sprintf(tc_cmd, "%s %s %s %s %s", "tc filter add dev lo ingress bpf",
+		       "direct-action object-file", prog,
 		       "section tc",
 		       (env.verbosity < VERBOSE_VERY) ? " 2>/dev/null" : "verbose");
 	if (CHECK(system(tc_cmd), "BPF load failed;",

@@ -129,15 +145,12 @@ get_port(int fd)
 static ssize_t
 rcv_msg(int srv_client, int type)
 {
-	struct sockaddr_storage ss;
 	char buf[BUFSIZ];
-	socklen_t slen;
 
 	if (type == SOCK_STREAM)
 		return read(srv_client, &buf, sizeof(buf));
 	else
-		return recvfrom(srv_client, &buf, sizeof(buf), 0,
-				(struct sockaddr *)&ss, &slen);
+		return recvfrom(srv_client, &buf, sizeof(buf), 0, NULL, NULL);
 }
 
 static int

@@ -16,6 +16,16 @@
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_endian.h>
 
+#if defined(IPROUTE2_HAVE_LIBBPF)
+/* Use a new-style map definition. */
+struct {
+	__uint(type, BPF_MAP_TYPE_SOCKMAP);
+	__type(key, int);
+	__type(value, __u64);
+	__uint(pinning, LIBBPF_PIN_BY_NAME);
+	__uint(max_entries, 1);
+} server_map SEC(".maps");
+#else
 /* Pin map under /sys/fs/bpf/tc/globals/<map name> */
 #define PIN_GLOBAL_NS 2
 

@@ -35,6 +45,7 @@ struct {
 	.max_elem = 1,
 	.pinning = PIN_GLOBAL_NS,
 };
+#endif
 
 char _license[] SEC("license") = "GPL";
 

@@ -0,0 +1,3 @@
+// SPDX-License-Identifier: GPL-2.0
+#define IPROUTE2_HAVE_LIBBPF
+#include "test_sk_assign.c"

@@ -5714,16 +5714,14 @@ static void apply_dsc_policy_for_stream(
 {
 	struct drm_connector *drm_connector = &aconnector->base;
 	uint32_t link_bandwidth_kbps;
-	uint32_t max_dsc_target_bpp_limit_override = 0;
 	struct dc *dc = sink->ctx->dc;
 	uint32_t max_supported_bw_in_kbps, timing_bw_in_kbps;
 	uint32_t dsc_max_supported_bw_in_kbps;
+	uint32_t max_dsc_target_bpp_limit_override =
+		drm_connector->display_info.max_dsc_bpp;
 
 	link_bandwidth_kbps = dc_link_bandwidth_kbps(aconnector->dc_link,
 							dc_link_get_link_cap(aconnector->dc_link));
-	if (stream->link && stream->link->local_sink)
-		max_dsc_target_bpp_limit_override =
-			stream->link->local_sink->edid_caps.panel_patch.max_dsc_target_bpp_limit;
 
 	/* Set DSC policy according to dsc_clock_en */
 	dc_dsc_policy_set_enable_dsc_when_not_needed(

@@ -673,15 +673,18 @@ static void set_dsc_configs_from_fairnes
 		int count,
 		int k)
 {
+	struct drm_connector *drm_connector;
 	int i;
 
 	for (i = 0; i < count; i++) {
+		drm_connector = &params[i].aconnector->base;
+
 		memset(&params[i].timing->dsc_cfg, 0, sizeof(params[i].timing->dsc_cfg));
 		if (vars[i + k].dsc_enabled && dc_dsc_compute_config(
 					params[i].sink->ctx->dc->res_pool->dscs[0],
 					&params[i].sink->dsc_caps.dsc_dec_caps,
 					params[i].sink->ctx->dc->debug.dsc_min_slice_height_override,
-					params[i].sink->edid_caps.panel_patch.max_dsc_target_bpp_limit,
+					drm_connector->display_info.max_dsc_bpp,
 					0,
 					params[i].timing,
 					&params[i].timing->dsc_cfg)) {

@@ -723,12 +726,16 @@ static int bpp_x16_from_pbn(struct dsc_m
 	struct dc_dsc_config dsc_config;
 	u64 kbps;
 
+	struct drm_connector *drm_connector = &param.aconnector->base;
+	uint32_t max_dsc_target_bpp_limit_override =
+		drm_connector->display_info.max_dsc_bpp;
+
 	kbps = div_u64((u64)pbn * 994 * 8 * 54, 64);
 	dc_dsc_compute_config(
 			param.sink->ctx->dc->res_pool->dscs[0],
 			&param.sink->dsc_caps.dsc_dec_caps,
 			param.sink->ctx->dc->debug.dsc_min_slice_height_override,
-			param.sink->edid_caps.panel_patch.max_dsc_target_bpp_limit,
+			max_dsc_target_bpp_limit_override,
 			(int) kbps, param.timing, &dsc_config);
 
 	return dsc_config.bits_per_pixel;

@@ -211,7 +211,7 @@ static void amdgpu_dm_destroy_drm_device
 
 static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm,
 				    struct amdgpu_dm_connector *amdgpu_dm_connector,
-				    uint32_t link_index,
+				    u32 link_index,
 				    struct amdgpu_encoder *amdgpu_encoder);
 static int amdgpu_dm_encoder_init(struct drm_device *dev,
 				  struct amdgpu_encoder *aencoder,

@@ -263,7 +263,7 @@ static u32 dm_vblank_get_counter(struct
 static int dm_crtc_get_scanoutpos(struct amdgpu_device *adev, int crtc,
 				  u32 *vbl, u32 *position)
 {
-	uint32_t v_blank_start, v_blank_end, h_position, v_position;
+	u32 v_blank_start, v_blank_end, h_position, v_position;
 
 	if ((crtc < 0) || (crtc >= adev->mode_info.num_crtc))
 		return -EINVAL;

@@ -391,7 +391,7 @@ static void dm_pflip_high_irq(void *inte
 	struct amdgpu_device *adev = irq_params->adev;
 	unsigned long flags;
 	struct drm_pending_vblank_event *e;
-	uint32_t vpos, hpos, v_blank_start, v_blank_end;
+	u32 vpos, hpos, v_blank_start, v_blank_end;
 	bool vrr_active;
 
 	amdgpu_crtc = get_crtc_by_otg_inst(adev, irq_params->irq_src - IRQ_TYPE_PFLIP);

@@ -678,7 +678,7 @@ static void dmub_hpd_callback(struct amd
 	struct drm_connector *connector;
 	struct drm_connector_list_iter iter;
 	struct dc_link *link;
-	uint8_t link_index = 0;
+	u8 link_index = 0;
 	struct drm_device *dev;
 
 	if (adev == NULL)

@@ -779,7 +779,7 @@ static void dm_dmub_outbox1_low_irq(void
 	struct amdgpu_device *adev = irq_params->adev;
 	struct amdgpu_display_manager *dm = &adev->dm;
 	struct dmcub_trace_buf_entry entry = { 0 };
-	uint32_t count = 0;
+	u32 count = 0;
 	struct dmub_hpd_work *dmub_hpd_wrk;
 	struct dc_link *plink = NULL;
 

@@ -1045,7 +1045,7 @@ static int dm_dmub_hw_init(struct amdgpu
 	struct dmub_srv_hw_params hw_params;
 	enum dmub_status status;
 	const unsigned char *fw_inst_const, *fw_bss_data;
-	uint32_t i, fw_inst_const_size, fw_bss_data_size;
+	u32 i, fw_inst_const_size, fw_bss_data_size;
 	bool has_hw_support;
 
 	if (!dmub_srv)

@@ -1206,10 +1206,10 @@ static void dm_dmub_hw_resume(struct amd
 
 static void mmhub_read_system_context(struct amdgpu_device *adev, struct dc_phy_addr_space_config *pa_config)
 {
-	uint64_t pt_base;
-	uint32_t logical_addr_low;
-	uint32_t logical_addr_high;
-	uint32_t agp_base, agp_bot, agp_top;
+	u64 pt_base;
+	u32 logical_addr_low;
+	u32 logical_addr_high;
+	u32 agp_base, agp_bot, agp_top;
 	PHYSICAL_ADDRESS_LOC page_table_start, page_table_end, page_table_base;
 
 	memset(pa_config, 0, sizeof(*pa_config));

@@ -2536,7 +2536,7 @@ struct amdgpu_dm_connector *
 amdgpu_dm_find_first_crtc_matching_connector(struct drm_atomic_state *state,
 					     struct drm_crtc *crtc)
 {
-	uint32_t i;
+	u32 i;
 	struct drm_connector_state *new_con_state;
 	struct drm_connector *connector;
 	struct drm_crtc *crtc_from_state;

@@ -3172,8 +3172,8 @@ static void handle_hpd_irq(void *param)
 
 static void dm_handle_mst_sideband_msg(struct amdgpu_dm_connector *aconnector)
 {
-	uint8_t esi[DP_PSR_ERROR_STATUS - DP_SINK_COUNT_ESI] = { 0 };
-	uint8_t dret;
+	u8 esi[DP_PSR_ERROR_STATUS - DP_SINK_COUNT_ESI] = { 0 };
+	u8 dret;
 	bool new_irq_handled = false;
 	int dpcd_addr;
 	int dpcd_bytes_to_read;

@@ -3201,7 +3201,7 @@ static void dm_handle_mst_sideband_msg(s
 
 	while (dret == dpcd_bytes_to_read &&
 		process_count < max_process_count) {
-		uint8_t retry;
+		u8 retry;
 		dret = 0;
 
 		process_count++;

@@ -3220,7 +3220,7 @@ static void dm_handle_mst_sideband_msg(s
 				dpcd_bytes_to_read - 1;
 
 			for (retry = 0; retry < 3; retry++) {
-				uint8_t wret;
+				u8 wret;
 
 				wret = drm_dp_dpcd_write(
 					&aconnector->dm_dp_aux.aux,

@@ -4236,12 +4236,12 @@ static void amdgpu_set_panel_orientation
 static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 {
 	struct amdgpu_display_manager *dm = &adev->dm;
-	int32_t i;
+	s32 i;
 	struct amdgpu_dm_connector *aconnector = NULL;
 	struct amdgpu_encoder *aencoder = NULL;
 	struct amdgpu_mode_info *mode_info = &adev->mode_info;
-	uint32_t link_cnt;
-	int32_t primary_planes;
+	u32 link_cnt;
+	s32 primary_planes;
 	enum dc_connection_type new_connection_type = dc_connection_none;
 	const struct dc_plane_cap *plane;
 	bool psr_feature_enabled = false;

@@ -4768,7 +4768,7 @@ fill_plane_color_attributes(const struct
 static int
 fill_dc_plane_info_and_addr(struct amdgpu_device *adev,
 			    const struct drm_plane_state *plane_state,
-			    const uint64_t tiling_flags,
+			    const u64 tiling_flags,
 			    struct dc_plane_info *plane_info,
 			    struct dc_plane_address *address,
 			    bool tmz_surface,

@@ -4977,7 +4977,7 @@ static void fill_dc_dirty_rects(struct d
 	uint32_t num_clips;
 	bool bb_changed;
 	bool fb_changed;
-	uint32_t i = 0;
+	u32 i = 0;
 
 	flip_addrs->dirty_rect_count = 0;
 

@@ -5111,7 +5111,7 @@ static enum dc_color_depth
 convert_color_depth_from_display_info(const struct drm_connector *connector,
 				      bool is_y420, int requested_bpc)
 {
-	uint8_t bpc;
+	u8 bpc;
 
 	if (is_y420) {
 		bpc = 8;

@@ -5655,8 +5655,8 @@ static void apply_dsc_policy_for_edp(str
 				    uint32_t max_dsc_target_bpp_limit_override)
 {
 	const struct dc_link_settings *verified_link_cap = NULL;
-	uint32_t link_bw_in_kbps;
-	uint32_t edp_min_bpp_x16, edp_max_bpp_x16;
+	u32 link_bw_in_kbps;
+	u32 edp_min_bpp_x16, edp_max_bpp_x16;
 	struct dc *dc = sink->ctx->dc;
 	struct dc_dsc_bw_range bw_range = {0};
 	struct dc_dsc_config dsc_cfg = {0};

@@ -5713,11 +5713,11 @@ static void apply_dsc_policy_for_stream(
 					struct dsc_dec_dpcd_caps *dsc_caps)
 {
 	struct drm_connector *drm_connector = &aconnector->base;
-	uint32_t link_bandwidth_kbps;
+	u32 link_bandwidth_kbps;
 	struct dc *dc = sink->ctx->dc;
-	uint32_t max_supported_bw_in_kbps, timing_bw_in_kbps;
-	uint32_t dsc_max_supported_bw_in_kbps;
-	uint32_t max_dsc_target_bpp_limit_override =
+	u32 max_supported_bw_in_kbps, timing_bw_in_kbps;
+	u32 dsc_max_supported_bw_in_kbps;
+	u32 max_dsc_target_bpp_limit_override =
 		drm_connector->display_info.max_dsc_bpp;
 
 	link_bandwidth_kbps = dc_link_bandwidth_kbps(aconnector->dc_link,

@@ -6871,7 +6871,7 @@ static uint add_fs_modes(struct amdgpu_d
 	const struct drm_display_mode *m;
 	struct drm_display_mode *new_mode;
 	uint i;
-	uint32_t new_modes_count = 0;
+	u32 new_modes_count = 0;
 
 	/* Standard FPS values
 	 *

@@ -6885,7 +6885,7 @@ static uint add_fs_modes(struct amdgpu_d
 	 * 60 	        - Commonly used
 	 * 48,72,96,120 - Multiples of 24
 	 */
-	static const uint32_t common_rates[] = {
+	static const u32 common_rates[] = {
 		23976, 24000, 25000, 29970, 30000,
 		48000, 50000, 60000, 72000, 96000, 120000
 	};

@@ -6901,8 +6901,8 @@ static uint add_fs_modes(struct amdgpu_d
 		return 0;
 
 	for (i = 0; i < ARRAY_SIZE(common_rates); i++) {
-		uint64_t target_vtotal, target_vtotal_diff;
-		uint64_t num, den;
+		u64 target_vtotal, target_vtotal_diff;
+		u64 num, den;
 
 		if (drm_mode_vrefresh(m) * 1000 < common_rates[i])
 			continue;

@@ -7150,7 +7150,7 @@ create_i2c(struct ddc_service *ddc_servi
  */
 static int amdgpu_dm_connector_init(struct amdgpu_display_manager *dm,
 				    struct amdgpu_dm_connector *aconnector,
-				    uint32_t link_index,
+				    u32 link_index,
 				    struct amdgpu_encoder *aencoder)
 {
 	int res = 0;

@@ -7641,8 +7641,8 @@ static void amdgpu_dm_commit_planes(stru
 				    struct drm_crtc *pcrtc,
 				    bool wait_for_vblank)
 {
-	uint32_t i;
-	uint64_t timestamp_ns;
+	u32 i;
+	u64 timestamp_ns;
 	struct drm_plane *plane;
 	struct drm_plane_state *old_plane_state, *new_plane_state;
 	struct amdgpu_crtc *acrtc_attach = to_amdgpu_crtc(pcrtc);

@@ -7653,7 +7653,7 @@ static void amdgpu_dm_commit_planes(stru
 			to_dm_crtc_state(drm_atomic_get_old_crtc_state(state, pcrtc));
 	int planes_count = 0, vpos, hpos;
 	unsigned long flags;
-	uint32_t target_vblank, last_flip_vblank;
+	u32 target_vblank, last_flip_vblank;
 	bool vrr_active = amdgpu_dm_vrr_active(acrtc_state);
 	bool cursor_update = false;
 	bool pflip_present = false;

@@ -8102,7 +8102,7 @@ static void amdgpu_dm_atomic_commit_tail
 	struct amdgpu_display_manager *dm = &adev->dm;
 	struct dm_atomic_state *dm_state;
 	struct dc_state *dc_state = NULL, *dc_state_temp = NULL;
-	uint32_t i, j;
+	u32 i, j;
 	struct drm_crtc *crtc;
 	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
 	unsigned long flags;

@@ -8732,7 +8732,7 @@ is_timing_unchanged_for_freesync(struct
 }
 
 static void set_freesync_fixed_config(struct dm_crtc_state *dm_new_crtc_state) {
-	uint64_t num, den, res;
+	u64 num, den, res;
 	struct drm_crtc_state *new_crtc_state = &dm_new_crtc_state->base;
 
 	dm_new_crtc_state->freesync_config.state = VRR_STATE_ACTIVE_FIXED;

@@ -9908,7 +9908,7 @@ fail:
 static bool is_dp_capable_without_timing_msa(struct dc *dc,
 					     struct amdgpu_dm_connector *amdgpu_dm_connector)
 {
-	uint8_t dpcd_data;
+	u8 dpcd_data;
 	bool capable = false;
 
 	if (amdgpu_dm_connector->dc_link &&

@@ -9927,7 +9927,7 @@ static bool is_dp_capable_without_timing
 static bool dm_edid_parser_send_cea(struct amdgpu_display_manager *dm,
 		unsigned int offset,
 		unsigned int total_length,
-		uint8_t *data,
+		u8 *data,
 		unsigned int length,
 		struct amdgpu_hdmi_vsdb_info *vsdb)
 {

@@ -9982,7 +9982,7 @@ static bool dm_edid_parser_send_cea(stru
 }
 
 static bool parse_edid_cea_dmcu(struct amdgpu_display_manager *dm,
-		uint8_t *edid_ext, int len,
+		u8 *edid_ext, int len,
 		struct amdgpu_hdmi_vsdb_info *vsdb_info)
 {
 	int i;

@@ -10023,7 +10023,7 @@ static bool parse_edid_cea_dmcu(struct a
 }
 
 static bool parse_edid_cea_dmub(struct amdgpu_display_manager *dm,
-		uint8_t *edid_ext, int len,
+		u8 *edid_ext, int len,
 		struct amdgpu_hdmi_vsdb_info *vsdb_info)
 {
 	int i;

@@ -10039,7 +10039,7 @@ static bool parse_edid_cea_dmub(struct a
 }
 
 static bool parse_edid_cea(struct amdgpu_dm_connector *aconnector,
-		uint8_t *edid_ext, int len,
+		u8 *edid_ext, int len,
 		struct amdgpu_hdmi_vsdb_info *vsdb_info)
 {
 	struct amdgpu_device *adev = drm_to_adev(aconnector->base.dev);

@@ -10053,7 +10053,7 @@ static bool parse_edid_cea(struct amdgpu
 static int parse_hdmi_amd_vsdb(struct amdgpu_dm_connector *aconnector,
 		struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
 {
-	uint8_t *edid_ext = NULL;
+	u8 *edid_ext = NULL;
 	int i;
 	bool valid_vsdb_found = false;
 

@@ -10229,7 +10229,7 @@ void amdgpu_dm_trigger_timing_sync(struc
 }
 
 void dm_write_reg_func(const struct dc_context *ctx, uint32_t address,
-		       uint32_t value, const char *func_name)
+		       u32 value, const char *func_name)
 {
 #ifdef DM_CHECK_ADDR_0
 	if (address == 0) {

@@ -10244,7 +10244,7 @@ void dm_write_reg_func(const struct dc_c
 uint32_t dm_read_reg_func(const struct dc_context *ctx, uint32_t address,
 			  const char *func_name)
 {
-	uint32_t value;
+	u32 value;
 #ifdef DM_CHECK_ADDR_0
 	if (address == 0) {
 		DC_ERR("invalid register read; address = 0\n");

@@ -3201,6 +3201,7 @@ static void dm_handle_mst_sideband_msg(s
 
 	while (dret == dpcd_bytes_to_read &&
 		process_count < max_process_count) {
+		u8 ack[DP_PSR_ERROR_STATUS - DP_SINK_COUNT_ESI] = {};
 		u8 retry;
 		dret = 0;
 

@@ -3209,28 +3210,29 @@ static void dm_handle_mst_sideband_msg(s
 		DRM_DEBUG_DRIVER("ESI %02x %02x %02x\n", esi[0], esi[1], esi[2]);
 		/* handle HPD short pulse irq */
 		if (aconnector->mst_mgr.mst_state)
-			drm_dp_mst_hpd_irq(
-				&aconnector->mst_mgr,
-				esi,
-				&new_irq_handled);
+			drm_dp_mst_hpd_irq_handle_event(&aconnector->mst_mgr,
+							esi,
+							ack,
+							&new_irq_handled);
 
 		if (new_irq_handled) {
 			/* ACK at DPCD to notify down stream */
-			const int ack_dpcd_bytes_to_write =
-				dpcd_bytes_to_read - 1;
-
 			for (retry = 0; retry < 3; retry++) {
-				u8 wret;
+				ssize_t wret;
 
-				wret = drm_dp_dpcd_write(
-					&aconnector->dm_dp_aux.aux,
-					dpcd_addr + 1,
-					&esi[1],
-					ack_dpcd_bytes_to_write);
-				if (wret == ack_dpcd_bytes_to_write)
+				wret = drm_dp_dpcd_writeb(&aconnector->dm_dp_aux.aux,
+							  dpcd_addr + 1,
+							  ack[1]);
+				if (wret == 1)
 					break;
 			}
 
+			if (retry == 3) {
+				DRM_ERROR("Failed to ack MST event.\n");
+				return;
+			}
+
+			drm_dp_mst_hpd_irq_send_new_request(&aconnector->mst_mgr);
 			/* check if there is new irq to be handled */
 			dret = drm_dp_dpcd_read(
 				&aconnector->dm_dp_aux.aux,

82 lines not on this page · raw message

@@ -3804,9 +3804,7 @@ intel_dp_mst_hpd_irq(struct intel_dp *in
 {
 	bool handled = false;
 
-	drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled);
-	if (handled)
-		ack[1] |= esi[1] & (DP_DOWN_REP_MSG_RDY | DP_UP_REQ_MSG_RDY);
+	drm_dp_mst_hpd_irq_handle_event(&intel_dp->mst_mgr, esi, ack, &handled);
 
 	if (esi[1] & DP_CP_IRQ) {
 		intel_hdcp_handle_cp_irq(intel_dp->attached_connector);

@@ -3881,6 +3879,9 @@ intel_dp_check_mst_status(struct intel_d
 
 		if (!intel_dp_ack_sink_irq_esi(intel_dp, ack))
 			drm_dbg_kms(&i915->drm, "Failed to ack ESI\n");
+
+		if (ack[1] & (DP_DOWN_REP_MSG_RDY | DP_UP_REQ_MSG_RDY))
+			drm_dp_mst_hpd_irq_send_new_request(&intel_dp->mst_mgr);
 	}
 
 	return link_ok;

@@ -1473,22 +1473,26 @@ nv50_mstm_service(struct nouveau_drm *dr
 	u8 esi[8] = {};
 
 	while (handled) {
+		u8 ack[8] = {};
+
 		rc = drm_dp_dpcd_read(aux, DP_SINK_COUNT_ESI, esi, 8);
 		if (rc != 8) {
 			ret = false;
 			break;
 		}
 
-		drm_dp_mst_hpd_irq(&mstm->mgr, esi, &handled);
+		drm_dp_mst_hpd_irq_handle_event(&mstm->mgr, esi, ack, &handled);
 		if (!handled)
 			break;
 
-		rc = drm_dp_dpcd_write(aux, DP_SINK_COUNT_ESI + 1, &esi[1],
-				       3);
-		if (rc != 3) {
+		rc = drm_dp_dpcd_writeb(aux, DP_SINK_COUNT_ESI + 1, ack[1]);
+
+		if (rc != 1) {
 			ret = false;
 			break;
 		}
+
+		drm_dp_mst_hpd_irq_send_new_request(&mstm->mgr);
 	}
 
 	if (!ret)

@@ -815,8 +815,11 @@ void drm_dp_mst_topology_mgr_destroy(str
 bool drm_dp_read_mst_cap(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]);
 int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state);
 
-int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled);
-
+int drm_dp_mst_hpd_irq_handle_event(struct drm_dp_mst_topology_mgr *mgr,
+				    const u8 *esi,
+				    u8 *ack,
+				    bool *handled);
+void drm_dp_mst_hpd_irq_send_new_request(struct drm_dp_mst_topology_mgr *mgr);
 
 int
 drm_dp_mst_detect_port(struct drm_connector *connector,

@@ -40,6 +40,9 @@
 #include "dc/dc_stat.h"
 #include "amdgpu_dm_trace.h"
 #include "dc/inc/dc_link_ddc.h"
+#include "dpcd_defs.h"
+#include "dc/inc/link_dpcd.h"
+#include "link_service_types.h"
 
 #include "vid.h"
 #include "amdgpu.h"

@@ -1273,6 +1276,21 @@ static void mmhub_read_system_context(st
 
 }
 
+static void force_connector_state(
+	struct amdgpu_dm_connector *aconnector,
+	enum drm_connector_force force_state)
+{
+	struct drm_connector *connector = &aconnector->base;
+
+	mutex_lock(&connector->dev->mode_config.mutex);
+	aconnector->base.force = force_state;
+	mutex_unlock(&connector->dev->mode_config.mutex);
+
+	mutex_lock(&aconnector->hpd_lock);
+	drm_kms_helper_connector_hotplug_event(connector);
+	mutex_unlock(&aconnector->hpd_lock);
+}
+
 static void dm_handle_hpd_rx_offload_work(struct work_struct *work)
 {
 	struct hpd_rx_irq_offload_work *offload_work;

@@ -1281,6 +1299,9 @@ static void dm_handle_hpd_rx_offload_wor
 	struct amdgpu_device *adev;
 	enum dc_connection_type new_connection_type = dc_connection_none;
 	unsigned long flags;
+	union test_response test_response;
+
+	memset(&test_response, 0, sizeof(test_response));
 
 	offload_work = container_of(work, struct hpd_rx_irq_offload_work, work);
 	aconnector = offload_work->offload_wq->aconnector;

@@ -1305,8 +1326,24 @@ static void dm_handle_hpd_rx_offload_wor
 		goto skip;
 
 	mutex_lock(&adev->dm.dc_lock);
-	if (offload_work->data.bytes.device_service_irq.bits.AUTOMATED_TEST)
+	if (offload_work->data.bytes.device_service_irq.bits.AUTOMATED_TEST) {
 		dc_link_dp_handle_automated_test(dc_link);
+
+		if (aconnector->timing_changed) {
+			/* force connector disconnect and reconnect */
+			force_connector_state(aconnector, DRM_FORCE_OFF);
+			msleep(100);
+			force_connector_state(aconnector, DRM_FORCE_UNSPECIFIED);
+		}
+
+		test_response.bits.ACK = 1;
+
+		core_link_write_dpcd(
+		dc_link,
+		DP_TEST_RESPONSE,
+		&test_response.raw,
+		sizeof(test_response));
+	}
 	else if ((dc_link->connector_signal != SIGNAL_TYPE_EDP) &&
 			hpd_rx_irq_check_link_loss_status(dc_link, &offload_work->data) &&
 			dc_link_dp_allow_hpd_rx_irq(dc_link)) {

@@ -3076,6 +3113,10 @@ void amdgpu_dm_update_connector_after_de
 						    aconnector->edid);
 		}
 
+		aconnector->timing_requested = kzalloc(sizeof(struct dc_crtc_timing), GFP_KERNEL);
+		if (!aconnector->timing_requested)
+			dm_error("%s: failed to create aconnector->requested_timing\n", __func__);
+
 		drm_connector_update_edid_property(connector, aconnector->edid);
 		amdgpu_dm_update_freesync_caps(connector, aconnector->edid);
 		update_connector_ext_caps(aconnector);

@@ -3087,6 +3128,8 @@ void amdgpu_dm_update_connector_after_de
 		dc_sink_release(aconnector->dc_sink);
 		aconnector->dc_sink = NULL;
 		aconnector->edid = NULL;
+		kfree(aconnector->timing_requested);
+		aconnector->timing_requested = NULL;
 #ifdef CONFIG_DRM_AMD_DC_HDCP
 		/* Set CP to DESIRED if it was ENABLED, so we can re-enable it again on hotplug */
 		if (connector->state->content_protection == DRM_MODE_CONTENT_PROTECTION_ENABLED)

@@ -3131,6 +3174,8 @@ static void handle_hpd_irq_helper(struct
 	if (aconnector->fake_enable)
 		aconnector->fake_enable = false;
 
+	aconnector->timing_changed = false;
+
 	if (!dc_link_detect_sink(aconnector->dc_link, &new_connection_type))
 		DRM_ERROR("KMS: Failed to detect connector\n");
 

@@ -5896,6 +5941,14 @@ create_stream_for_sink(struct amdgpu_dm_
 			stream, &mode, &aconnector->base, con_state, old_stream,
 			requested_bpc);
 
+	if (aconnector->timing_changed) {
+		DC_LOG_DEBUG("%s: overriding timing for automated test, bpc %d, changing to %d\n",
+				__func__,
+				stream->timing.display_color_depth,
+				aconnector->timing_requested->display_color_depth);
+		stream->timing = *aconnector->timing_requested;
+	}
+
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	/* SST DSC determination policy */
 	update_dsc_caps(aconnector, sink, stream, &dsc_caps);

@@ -31,6 +31,7 @@
 #include <drm/drm_connector.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_plane.h>
+#include "link_service_types.h"
 
 /*
  * This file contains the definition for amdgpu_display_manager

@@ -650,6 +651,10 @@ struct amdgpu_dm_connector {
 
 	/* Record progress status of mst*/
 	uint8_t mst_status;
+
+	/* Automated testing */
+	bool timing_changed;
+	struct dc_crtc_timing *timing_requested;
 };
 
 static inline void amdgpu_dm_set_mst_status(uint8_t *status,

137 lines not on this page · raw message

151 lines not on this page · raw message

@@ -156,6 +156,12 @@ enum dc_edid_status dm_helpers_read_loca
 		struct dc_link *link,
 		struct dc_sink *sink);
 
+bool dm_helpers_dp_handle_test_pattern_request(
+		struct dc_context *ctx,
+		const struct dc_link *link,
+		union link_test_pattern dpcd_test_pattern,
+		union test_misc dpcd_test_params);
+
 void dm_set_dcn_clocks(
 		struct dc_context *ctx,
 		struct dc_clocks *clks);

@@ -408,12 +408,12 @@ static void dm_pflip_high_irq(void *inte
 
 	spin_lock_irqsave(&adev_to_drm(adev)->event_lock, flags);
 
-	if (amdgpu_crtc->pflip_status != AMDGPU_FLIP_SUBMITTED){
-		DC_LOG_PFLIP("amdgpu_crtc->pflip_status = %d !=AMDGPU_FLIP_SUBMITTED(%d) on crtc:%d[%p] \n",
-						 amdgpu_crtc->pflip_status,
-						 AMDGPU_FLIP_SUBMITTED,
-						 amdgpu_crtc->crtc_id,
-						 amdgpu_crtc);
+	if (amdgpu_crtc->pflip_status != AMDGPU_FLIP_SUBMITTED) {
+		DC_LOG_PFLIP("amdgpu_crtc->pflip_status = %d !=AMDGPU_FLIP_SUBMITTED(%d) on crtc:%d[%p]\n",
+			     amdgpu_crtc->pflip_status,
+			     AMDGPU_FLIP_SUBMITTED,
+			     amdgpu_crtc->crtc_id,
+			     amdgpu_crtc);
 		spin_unlock_irqrestore(&adev_to_drm(adev)->event_lock, flags);
 		return;
 	}

@@ -861,7 +861,7 @@ static int dm_set_powergating_state(void
 }
 
 /* Prototypes of private functions */
-static int dm_early_init(void* handle);
+static int dm_early_init(void *handle);
 
 /* Allocate memory for FBC compressed data  */
 static void amdgpu_dm_fbc_init(struct drm_connector *connector)

@@ -1260,7 +1260,7 @@ static void mmhub_read_system_context(st
 	pa_config->system_aperture.start_addr = (uint64_t)logical_addr_low << 18;
 	pa_config->system_aperture.end_addr = (uint64_t)logical_addr_high << 18;
 
-	pa_config->system_aperture.agp_base = (uint64_t)agp_base << 24 ;
+	pa_config->system_aperture.agp_base = (uint64_t)agp_base << 24;
 	pa_config->system_aperture.agp_bot = (uint64_t)agp_bot << 24;
 	pa_config->system_aperture.agp_top = (uint64_t)agp_top << 24;
 

@@ -1343,8 +1343,7 @@ static void dm_handle_hpd_rx_offload_wor
 		DP_TEST_RESPONSE,
 		&test_response.raw,
 		sizeof(test_response));
-	}
-	else if ((dc_link->connector_signal != SIGNAL_TYPE_EDP) &&
+	} else if ((dc_link->connector_signal != SIGNAL_TYPE_EDP) &&
 			hpd_rx_irq_check_link_loss_status(dc_link, &offload_work->data) &&
 			dc_link_dp_allow_hpd_rx_irq(dc_link)) {
 		dc_link_dp_handle_link_loss(dc_link);

@@ -1519,7 +1518,7 @@ static int amdgpu_dm_init(struct amdgpu_
 	mutex_init(&adev->dm.audio_lock);
 	spin_lock_init(&adev->dm.vblank_lock);
 
-	if(amdgpu_dm_irq_init(adev)) {
+	if (amdgpu_dm_irq_init(adev)) {
 		DRM_ERROR("amdgpu: failed to initialize DM IRQ support.\n");
 		goto error;
 	}

@@ -1654,9 +1653,8 @@ static int amdgpu_dm_init(struct amdgpu_
 	if (amdgpu_dc_debug_mask & DC_DISABLE_STUTTER)
 		adev->dm.dc->debug.disable_stutter = true;
 
-	if (amdgpu_dc_debug_mask & DC_DISABLE_DSC) {
+	if (amdgpu_dc_debug_mask & DC_DISABLE_DSC)
 		adev->dm.dc->debug.disable_dsc = true;
-	}
 
 	if (amdgpu_dc_debug_mask & DC_DISABLE_CLOCK_GATING)
 		adev->dm.dc->debug.disable_clock_gate = true;

@@ -1877,8 +1875,6 @@ static void amdgpu_dm_fini(struct amdgpu
 	mutex_destroy(&adev->dm.audio_lock);
 	mutex_destroy(&adev->dm.dc_lock);
 	mutex_destroy(&adev->dm.dpia_aux_lock);
-
-	return;
 }
 
 static int load_dmcu_fw(struct amdgpu_device *adev)

@@ -1887,7 +1883,7 @@ static int load_dmcu_fw(struct amdgpu_de
 	int r;
 	const struct dmcu_firmware_header_v1_0 *hdr;
 
-	switch(adev->asic_type) {
+	switch (adev->asic_type) {
 #if defined(CONFIG_DRM_AMD_DC_SI)
 	case CHIP_TAHITI:
 	case CHIP_PITCAIRN:

@@ -2679,7 +2675,7 @@ static void dm_gpureset_commit_state(str
 		struct dc_scaling_info scaling_infos[MAX_SURFACES];
 		struct dc_flip_addrs flip_addrs[MAX_SURFACES];
 		struct dc_stream_update stream_update;
-	} * bundle;
+	} *bundle;
 	int k, m;
 
 	bundle = kzalloc(sizeof(*bundle), GFP_KERNEL);

@@ -2709,8 +2705,6 @@ static void dm_gpureset_commit_state(str
 
 cleanup:
 	kfree(bundle);
-
-	return;
 }
 
 static int dm_resume(void *handle)

@@ -2924,8 +2918,7 @@ static const struct amd_ip_funcs amdgpu_
 	.set_powergating_state = dm_set_powergating_state,
 };
 
-const struct amdgpu_ip_block_version dm_ip_block =
-{
+const struct amdgpu_ip_block_version dm_ip_block = {
 	.type = AMD_IP_BLOCK_TYPE_DCE,
 	.major = 1,
 	.minor = 0,

@@ -2982,9 +2975,12 @@ static void update_connector_ext_caps(st
 	caps->ext_caps = &aconnector->dc_link->dpcd_sink_ext_caps;
 	caps->aux_support = false;
 
-	if (caps->ext_caps->bits.oled == 1 /*||
-	    caps->ext_caps->bits.sdr_aux_backlight_control == 1 ||
-	    caps->ext_caps->bits.hdr_aux_backlight_control == 1*/)
+	if (caps->ext_caps->bits.oled == 1
+	    /*
+	     * ||
+	     * caps->ext_caps->bits.sdr_aux_backlight_control == 1 ||
+	     * caps->ext_caps->bits.hdr_aux_backlight_control == 1
+	     */)
 		caps->aux_support = true;
 
 	if (amdgpu_backlight == 0)

@@ -3248,6 +3244,7 @@ static void dm_handle_mst_sideband_msg(s
 		process_count < max_process_count) {
 		u8 ack[DP_PSR_ERROR_STATUS - DP_SINK_COUNT_ESI] = {};
 		u8 retry;
+
 		dret = 0;
 
 		process_count++;

@@ -3449,7 +3446,7 @@ static void register_hpd_handlers(struct
 		aconnector = to_amdgpu_dm_connector(connector);
 		dc_link = aconnector->dc_link;
 
-		if (DC_IRQ_SOURCE_INVALID != dc_link->irq_source_hpd) {
+		if (dc_link->irq_source_hpd != DC_IRQ_SOURCE_INVALID) {
 			int_params.int_context = INTERRUPT_LOW_IRQ_CONTEXT;
 			int_params.irq_source = dc_link->irq_source_hpd;
 

@@ -3458,7 +3455,7 @@ static void register_hpd_handlers(struct
 					(void *) aconnector);
 		}
 
-		if (DC_IRQ_SOURCE_INVALID != dc_link->irq_source_hpd_rx) {
+		if (dc_link->irq_source_hpd_rx != DC_IRQ_SOURCE_INVALID) {
 
 			/* Also register for DP short pulse (hpd_rx). */
 			int_params.int_context = INTERRUPT_LOW_IRQ_CONTEXT;

@@ -3484,7 +3481,7 @@ static int dce60_register_irq_handlers(s
 	struct dc_interrupt_params int_params = {0};
 	int r;
 	int i;
-	unsigned client_id = AMDGPU_IRQ_CLIENTID_LEGACY;
+	unsigned int client_id = AMDGPU_IRQ_CLIENTID_LEGACY;
 
 	int_params.requested_polarity = INTERRUPT_POLARITY_DEFAULT;
 	int_params.current_polarity = INTERRUPT_POLARITY_DEFAULT;

@@ -3498,11 +3495,12 @@ static int dce60_register_irq_handlers(s
 	 *    Base driver will call amdgpu_dm_irq_handler() for ALL interrupts
 	 *    coming from DC hardware.
 	 *    amdgpu_dm_irq_handler() will re-direct the interrupt to DC
-	 *    for acknowledging and handling. */
+	 *    for acknowledging and handling.
+	 */
 
 	/* Use VBLANK interrupt */
 	for (i = 0; i < adev->mode_info.num_crtc; i++) {
-		r = amdgpu_irq_add_id(adev, client_id, i+1 , &adev->crtc_irq);
+		r = amdgpu_irq_add_id(adev, client_id, i + 1, &adev->crtc_irq);
 		if (r) {
 			DRM_ERROR("Failed to add crtc irq id!\n");
 			return r;

@@ -3510,7 +3508,7 @@ static int dce60_register_irq_handlers(s
 
 		int_params.int_context = INTERRUPT_HIGH_IRQ_CONTEXT;
 		int_params.irq_source =
-			dc_interrupt_to_irq_source(dc, i+1 , 0);
+			dc_interrupt_to_irq_source(dc, i + 1, 0);
 
 		c_irq_params = &adev->dm.vblank_params[int_params.irq_source - DC_IRQ_SOURCE_VBLANK1];
 

@@ -3566,7 +3564,7 @@ static int dce110_register_irq_handlers(
 	struct dc_interrupt_params int_params = {0};
 	int r;
 	int i;
-	unsigned client_id = AMDGPU_IRQ_CLIENTID_LEGACY;
+	unsigned int client_id = AMDGPU_IRQ_CLIENTID_LEGACY;
 
 	if (adev->family >= AMDGPU_FAMILY_AI)
 		client_id = SOC15_IH_CLIENTID_DCE;

@@ -3583,7 +3581,8 @@ static int dce110_register_irq_handlers(
 	 *    Base driver will call amdgpu_dm_irq_handler() for ALL interrupts
 	 *    coming from DC hardware.
 	 *    amdgpu_dm_irq_handler() will re-direct the interrupt to DC
-	 *    for acknowledging and handling. */
+	 *    for acknowledging and handling.
+	 */
 
 	/* Use VBLANK interrupt */
 	for (i = VISLANDS30_IV_SRCID_D1_VERTICAL_INTERRUPT0; i <= VISLANDS30_IV_SRCID_D6_VERTICAL_INTERRUPT0; i++) {

@@ -4032,7 +4031,7 @@ static void amdgpu_dm_update_backlight_c
 }
 
 static int get_brightness_range(const struct amdgpu_dm_backlight_caps *caps,
-				unsigned *min, unsigned *max)
+				unsigned int *min, unsigned int *max)
 {
 	if (!caps)
 		return 0;