linux-kernel - [PATCH net-next] cxgb4/cxgb4vf_main: Mark expected switch fall-through

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Message-ID: <20190424162742.GA10085@embeddedor>
Date:   Wed, 24 Apr 2019 11:27:42 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Casey Leedom <leedom@...lsio.com>,
        "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Kees Cook <keescook@...omium.org>
Subject: [PATCH net-next] cxgb4/cxgb4vf_main: Mark expected switch
 fall-through

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warning:

drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c: In function ‘fwevtq_handler’:
drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c:520:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
   cpl = (void *)p;
   ~~~~^~~~~~~~~~~
drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c:524:2: note: here
  case CPL_SGE_EGR_UPDATE: {
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
index a8c4e0c851e7..6d4cf3d0b2f0 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
@@ -518,8 +518,8 @@ static int fwevtq_handler(struct sge_rspq *rspq, const __be64 *rsp,
 			break;
 		}
 		cpl = (void *)p;
-		/*FALLTHROUGH*/
 	}
+		/* Fall through */
 
 	case CPL_SGE_EGR_UPDATE: {
 		/*
-- 
2.21.0