linux-hardening - [PATCH][next] mwifiex: Fix fall-through warnings for Clang

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Date:   Tue, 17 Nov 2020 10:09:58 -0600
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Amitkumar Karwar <amitkarwar@...il.com>,
        Ganapathi Bhat <ganapathi.bhat@....com>,
        Xinming Hu <huxinming820@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-hardening@...r.kernel.org
Subject: [PATCH][next] 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.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 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(+)

diff --git a/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c b/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c
index 119ccacd1fcc..6b5d35d9e69f 100644
--- a/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c
@@ -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:
diff --git a/drivers/net/wireless/marvell/mwifiex/sta_event.c b/drivers/net/wireless/marvell/mwifiex/sta_event.c
index bc79ca4cb803..68c63268e2e6 100644
--- a/drivers/net/wireless/marvell/mwifiex/sta_event.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_event.c
@@ -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;
 			}
diff --git a/drivers/net/wireless/marvell/mwifiex/uap_cmd.c b/drivers/net/wireless/marvell/mwifiex/uap_cmd.c
index b48a85d791f6..18e89777b784 100644
--- a/drivers/net/wireless/marvell/mwifiex/uap_cmd.c
+++ b/drivers/net/wireless/marvell/mwifiex/uap_cmd.c
@@ -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;
 		}
diff --git a/drivers/net/wireless/marvell/mwifiex/wmm.c b/drivers/net/wireless/marvell/mwifiex/wmm.c
index b8f19ca73414..0b375608df7d 100644
--- a/drivers/net/wireless/marvell/mwifiex/wmm.c
+++ b/drivers/net/wireless/marvell/mwifiex/wmm.c
@@ -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;
 	}
-- 
2.27.0