linux-hardening - [PATCH][next] net: axienet: Fix fall-through warning for Clang

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Date:   Fri, 28 May 2021 14:58:31 -0500
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Michal Simek <michal.simek@...inx.com>
Cc:     netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-hardening@...r.kernel.org
Subject: [PATCH][next] net: axienet: Fix fall-through warning for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding a fallthrough statement instead of just
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>
---
JFYI: We had thousands of these sorts of warnings and now we are down
      to just 25 in linux-next. This is one of those last remaining
      warnings.

 drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index b508c9453f40..e29ad9a86a3c 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -1543,6 +1543,7 @@ static void axienet_validate(struct phylink_config *config,
 	case PHY_INTERFACE_MODE_MII:
 		phylink_set(mask, 100baseT_Full);
 		phylink_set(mask, 10baseT_Full);
+		fallthrough;
 	default:
 		break;
 	}
-- 
2.27.0