commit 24f2161887c90ca3791f0224933642b6da7f9573
author Gustavo A. R. Silva <gustavo@embeddedor.com> Mon Jul 29 15:03:49 2019 -0500
committer Gustavo A. R. Silva <gustavo@embeddedor.com> Fri Aug 09 19:48:13 2019 -0500
tree e81f776a289e8453c0ec195c2296340078448bcf
parent d259f94f7265065b5c2b2bd5bbe4fa9b76504440

watchdog: scx200_wdt: Mark expected switch fall-through

Mark switch cases where we are expecting to fall through.

This patch fixes the following warning (Building: i386):

drivers/watchdog/scx200_wdt.c: In function ‘scx200_wdt_ioctl’:
drivers/watchdog/scx200_wdt.c:188:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   scx200_wdt_ping();
   ^~~~~~~~~~~~~~~~~
drivers/watchdog/scx200_wdt.c:189:2: note: here
  case WDIOC_GETTIMEOUT:
  ^~~~

Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

drivers/watchdog/scx200_wdt.c

diff --git a/drivers/watchdog/scx200_wdt.c b/drivers/watchdog/scx200_wdt.c
index efd7996..4626830 100644
--- a/drivers/watchdog/scx200_wdt.c
+++ b/drivers/watchdog/scx200_wdt.c
@@ -186,6 +186,7 @@ static long scx200_wdt_ioctl(struct file *file, unsigned int cmd,
 		margin = new_margin;
 		scx200_wdt_update_margin();
 		scx200_wdt_ping();
+		/* Fall through */
 	case WDIOC_GETTIMEOUT:
 		if (put_user(margin, p))
 			return -EFAULT;