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scsi: libfc: Convert timers to use timer_setup()

PATCH In review Kees Cook 3 participants 3 messages Oct 16, 2017 – Oct 17, 2017

Subsystems (2)
SCSI FCoE subsystem (libfc, libfcoe, fcoe)
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Kees Cook

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#0 lore raw

PATCH 1/1 scsi: libfc: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. This removes several redundant setup calls in favor of just changing the timer function directly.

Cc Johannes Thumshirn <[email protected]>
Cc "James E.J. Bottomley" <[email protected]>
Cc "Martin K. Petersen" <[email protected]>
Cc [email protected]
Cc [email protected]
Signed-off-by Kees Cook <[email protected]>
---
 drivers/scsi/libfc/fc_fcp.c | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)
drivers/scsi/libfc/fc_fcp.c +10 -11
index 772c35a5c49e..1a4e701a8449 100644
@@ -97,7 +97,7 @@ static void fc_fcp_complete_locked(struct fc_fcp_pkt *);
 static void fc_tm_done(struct fc_seq *, struct fc_frame *, void *);
 static void fc_fcp_error(struct fc_fcp_pkt *, struct fc_frame *);
 static void fc_fcp_recovery(struct fc_fcp_pkt *, u8 code);
-static void fc_fcp_timeout(unsigned long);
+static void fc_fcp_timeout(struct timer_list *);
 static void fc_fcp_rec(struct fc_fcp_pkt *);
 static void fc_fcp_rec_error(struct fc_fcp_pkt *, struct fc_frame *);
 static void fc_fcp_rec_resp(struct fc_seq *, struct fc_frame *, void *);

@@ -155,8 +155,7 @@ static struct fc_fcp_pkt *fc_fcp_pkt_alloc(struct fc_lport *lport, gfp_t gfp)
 		fsp->lp = lport;
 		fsp->xfer_ddp = FC_XID_UNKNOWN;
 		refcount_set(&fsp->ref_cnt, 1);
-		init_timer(&fsp->timer);
-		fsp->timer.data = (unsigned long)fsp;
+		timer_setup(&fsp->timer, NULL, 0);
 		INIT_LIST_HEAD(&fsp->list);
 		spin_lock_init(&fsp->scsi_pkt_lock);
 	} else {

@@ -1215,7 +1214,7 @@ static int fc_fcp_cmd_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp,
 	fsp->seq_ptr = seq;
 	fc_fcp_pkt_hold(fsp);	/* hold for fc_fcp_pkt_destroy */
 
-	setup_timer(&fsp->timer, fc_fcp_timeout, (unsigned long)fsp);
+	fsp->timer.function = (TIMER_FUNC_TYPE)fc_fcp_timeout;
 	if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED)
 		fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp));
 

@@ -1298,9 +1297,9 @@ static int fc_fcp_pkt_abort(struct fc_fcp_pkt *fsp)
  * fc_lun_reset_send() - Send LUN reset command
  * @data: The FCP packet that identifies the LUN to be reset
  */
-static void fc_lun_reset_send(unsigned long data)
+static void fc_lun_reset_send(struct timer_list *t)
 {
-	struct fc_fcp_pkt *fsp = (struct fc_fcp_pkt *)data;
+	struct fc_fcp_pkt *fsp = from_timer(fsp, t, timer);
 	struct fc_lport *lport = fsp->lp;
 
 	if (lport->tt.fcp_cmd_send(lport, fsp, fc_tm_done)) {

@@ -1308,7 +1307,7 @@ static void fc_lun_reset_send(unsigned long data)
 			return;
 		if (fc_fcp_lock_pkt(fsp))
 			return;
-		setup_timer(&fsp->timer, fc_lun_reset_send, (unsigned long)fsp);
+		fsp->timer.function = (TIMER_FUNC_TYPE)fc_lun_reset_send;
 		fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp));
 		fc_fcp_unlock_pkt(fsp);
 	}

@@ -1334,7 +1333,7 @@ static int fc_lun_reset(struct fc_lport *lport, struct fc_fcp_pkt *fsp,
 	fsp->wait_for_comp = 1;
 	init_completion(&fsp->tm_done);
 
-	fc_lun_reset_send((unsigned long)fsp);
+	fc_lun_reset_send(&fsp->timer);
 
 	/*
 	 * wait for completion of reset

@@ -1431,9 +1430,9 @@ static void fc_fcp_cleanup(struct fc_lport *lport)
  * received we see if data was received recently. If it has been then we
  * continue waiting, otherwise, we abort the command.
  */
-static void fc_fcp_timeout(unsigned long data)
+static void fc_fcp_timeout(struct timer_list *t)
 {
-	struct fc_fcp_pkt *fsp = (struct fc_fcp_pkt *)data;
+	struct fc_fcp_pkt *fsp = from_timer(fsp, t, timer);
 	struct fc_rport *rport = fsp->rport;
 	struct fc_rport_libfc_priv *rpriv = rport->dd_data;
 

@@ -1446,7 +1445,7 @@ static void fc_fcp_timeout(unsigned long data)
 	if (fsp->lp->qfull) {
 		FC_FCP_DBG(fsp, "fcp timeout, resetting timer delay %d\n",
 			   fsp->timer_delay);
-		setup_timer(&fsp->timer, fc_fcp_timeout, (unsigned long)fsp);
+		fsp->timer.function = (TIMER_FUNC_TYPE)fc_fcp_timeout;
 		fc_fcp_timer_set(fsp, fsp->timer_delay);
 		goto unlock;
 	}
Signature · 6 lines
2.7.4


-- 
Kees Cook
Pixel Security
Reviewed-by on v1 1/1
#1 lore raw

Kees,

Quoted 5 lines

In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. This removes several redundant setup calls in favor of just changing the timer function directly.

Looks OK to me.

Reviewed-by Martin K. Petersen <[email protected]>
Signature · 1 line
Martin K. Petersen	Oracle Linux Engineering