arcnet: arc-rimi: 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/arc-rimi.c: In function 'arcrimi_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/arc-rimi.c:365:3: note: in expansion of macro 'pr_err'
   pr_err("Too many arguments\n");
   ^~~~~~
drivers/net/arcnet/arc-rimi.c:366:2: note: here
  case 3:  /* Node ID */
  ^~~~
drivers/net/arcnet/arc-rimi.c:367:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
   node = ints[3];
   ~~~~~^~~~~~~~~
drivers/net/arcnet/arc-rimi.c:368:2: note: here
  case 2:  /* IRQ */
  ^~~~
drivers/net/arcnet/arc-rimi.c:369:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
   irq = ints[2];
   ~~~~^~~~~~~~~
drivers/net/arcnet/arc-rimi.c:370:2: note: here
  case 1:  /* IO address */
  ^~~~

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/arcnet/arc-rimi.c b/drivers/net/arcnet/arc-rimi.c
index 11c5bad..14a5fb3 100644 (file)
--- a/drivers/net/arcnet/arc-rimi.c
+++ b/drivers/net/arcnet/arc-rimi.c
@@ -363,10 +363,13 @@ static int __init arcrimi_setup(char *s)
        switch (ints[0]) {
        default:                /* ERROR */
                pr_err("Too many arguments\n");
+               /* Fall through */
        case 3:         /* Node ID */
                node = ints[3];
+               /* Fall through */
        case 2:         /* IRQ */
                irq = ints[2];
+               /* Fall through */
        case 1:         /* IO address */
                io = ints[1];
        }