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mwifiex: Fix fall-through warnings for Clang

PATCH In review Gustavo A. R. Silva 3 participants 5 messages Nov 17, 2020 – Nov 24, 2020

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#0 lore raw

PATCH 1/1 mwifiex: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple warnings by explicitly adding multiple break statements instead of letting the code fall through to the next case.

---
 drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c | 2 ++
 drivers/net/wireless/marvell/mwifiex/sta_event.c   | 1 +
 drivers/net/wireless/marvell/mwifiex/uap_cmd.c     | 1 +
 drivers/net/wireless/marvell/mwifiex/wmm.c         | 1 +
 4 files changed, 5 insertions(+)
drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c +2 -0
index 119ccacd1fcc..6b5d35d9e69f 100644
@@ -201,6 +201,7 @@ static int mwifiex_ret_802_11_snmp_mib(struct mwifiex_private *priv,
 			mwifiex_dbg(priv->adapter, INFO,
 				    "info: SNMP_RESP: DTIM period=%u\n",
 				    ul_temp);
+			break;
 		default:
 			break;
 		}
@@ -1393,6 +1394,7 @@ int mwifiex_process_sta_cmdresp(struct mwifiex_private *priv, u16 cmdresp_no,
 		break;
 	case HostCmd_CMD_TDLS_OPER:
 		ret = mwifiex_ret_tdls_oper(priv, resp);
+		break;
 	case HostCmd_CMD_MC_POLICY:
 		break;
 	case HostCmd_CMD_CHAN_REPORT_REQUEST:
drivers/net/wireless/marvell/mwifiex/sta_event.c +1 -0
index bc79ca4cb803..68c63268e2e6 100644
@@ -99,6 +99,7 @@ static int mwifiex_check_ibss_peer_capabilities(struct mwifiex_private *priv,
 			case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
 				sta_ptr->max_amsdu =
 					MWIFIEX_TX_DATA_BUF_SIZE_4K;
+				break;
 			default:
 				break;
 			}
drivers/net/wireless/marvell/mwifiex/uap_cmd.c +1 -0
index b48a85d791f6..18e89777b784 100644
@@ -108,6 +108,7 @@ int mwifiex_set_secure_params(struct mwifiex_private *priv,
 			if (params->crypto.wpa_versions & NL80211_WPA_VERSION_2)
 				bss_config->wpa_cfg.pairwise_cipher_wpa2 |=
 								CIPHER_AES_CCMP;
+			break;
 		default:
 			break;
 		}
drivers/net/wireless/marvell/mwifiex/wmm.c +1 -0
index b8f19ca73414..0b375608df7d 100644
@@ -1396,6 +1396,7 @@ mwifiex_send_processed_packet(struct mwifiex_private *priv,
 		break;
 	case 0:
 		mwifiex_write_data_complete(adapter, skb, 0, ret);
+		break;
 	default:
 		break;
 	}
Signature · 1 line
2.27.0
#1 lore raw
Quoted 3 lines · Gustavo A. R. Silva

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple warnings by explicitly adding multiple break statements instead of letting the code fall through to the next case.

Thanks Gustavo.

I think this is better style than the gcc allowed
undescribed fallthrough to break;

gcc developers disagree though:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91432

#2 lore raw
Quoted 5 lines · Joe Perches
Quoted 3 lines · Gustavo A. R. Silva

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple warnings by explicitly adding multiple break statements instead of letting the code fall through to the next case.

Quoted 8 lines

Thanks Gustavo.

I think this is better style than the gcc allowed
undescribed fallthrough to break;

gcc developers disagree though:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91432

Yeah; I mention that in this[1] changelog text, together with the reasons why we think the Clang approach is safer. which is exactly the same information contained in the link[2] included in the changelog text for this commit.

--
Gustavo

[1] https://git.kernel.org/linus/4169e889e5889405d54cec27d6e9f7f0ce3c7096
[2] https://github.com/KSPP/linux/issues/115

#3 lore raw
In reply to Gustavo A. R. Silva
Quoted 6 lines · Gustavo A. R. Silva

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple warnings by explicitly adding multiple break statements instead of letting the code fall through to the next case.

Patch applied to wireless-drivers-next.git, thanks.

003317581372 mwifiex: Fix fall-through warnings for Clang

Signature · 3 lines
https://patchwork.kernel.org/project/linux-wireless/patch/20201117160958.GA18807@embeddedor/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
#4 lore raw
Quoted 6 lines · Kalle Valo
Quoted 4 lines · Gustavo A. R. Silva

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple warnings by explicitly adding multiple break statements instead of letting the code fall through to the next case.

Quoted 6 lines
Quoted 2 lines

Patch applied to wireless-drivers-next.git, thanks.

003317581372 mwifiex: Fix fall-through warnings for Clang

Thank you, Kalle.
--
Gustavo