netdev - [PATCH] arcnet: com90io: Mark expected switch fall-throughs

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Message-ID: <20190729111320.GA3193@embeddedor>
Date:   Mon, 29 Jul 2019 06:13:20 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Michael Grzeschik <m.grzeschik@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Kees Cook <keescook@...omium.org>
Subject: [PATCH] arcnet: com90io: Mark expected switch fall-throughs

Mark switch cases where we are expecting to fall through.

This patch fixes the following warnings (Building: powerpc allyesconfig):

drivers/net/arcnet/com90io.c: In function 'com90io_setup':
include/linux/printk.h:304:2: warning: this statement may fall through [-Wimplicit-fallthrough=]
  printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/arcnet/com90io.c:365:3: note: in expansion of macro 'pr_err'
   pr_err("Too many arguments\n");
   ^~~~~~
drivers/net/arcnet/com90io.c:366:2: note: here
  case 2:  /* IRQ */
  ^~~~
drivers/net/arcnet/com90io.c:367:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
   irq = ints[2];
   ~~~~^~~~~~~~~
drivers/net/arcnet/com90io.c:368:2: note: here
  case 1:  /* IO address */
  ^~~~

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/net/arcnet/com90io.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/arcnet/com90io.c b/drivers/net/arcnet/com90io.c
index 2c546013a980..186bbf87bc84 100644
--- a/drivers/net/arcnet/com90io.c
+++ b/drivers/net/arcnet/com90io.c
@@ -363,8 +363,10 @@ static int __init com90io_setup(char *s)
 	switch (ints[0]) {
 	default:		/* ERROR */
 		pr_err("Too many arguments\n");
+		/* Fall through */
 	case 2:		/* IRQ */
 		irq = ints[2];
+		/* Fall through */
 	case 1:		/* IO address */
 		io = ints[1];
 	}
-- 
2.22.0