watchdog: Mark expected switch fall-throughs
Mark switch cases where we are expecting to fall through. This patch fixes the following warnings: drivers/watchdog/ar7_wdt.c: warning: this statement may fall through [-Wimplicit-fallthrough=]: => 237:3 drivers/watchdog/pcwd.c: warning: this statement may fall through [-Wimplicit-fallthrough=]: => 653:3 drivers/watchdog/sb_wdog.c: warning: this statement may fall through [-Wimplicit-fallthrough=]: => 204:3 drivers/watchdog/wdt.c: warning: this statement may fall through [-Wimplicit-fallthrough=]: => 391:3 Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> 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>
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@ -235,6 +235,7 @@ static long ar7_wdt_ioctl(struct file *file,
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ar7_wdt_update_margin(new_margin);
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ar7_wdt_kick(1);
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spin_unlock(&wdt_lock);
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/* Fall through */
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case WDIOC_GETTIMEOUT:
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if (put_user(margin, (int *)arg))
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@ -651,7 +651,7 @@ static long pcwd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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return -EINVAL;
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pcwd_keepalive();
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/* Fall */
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/* Fall through */
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case WDIOC_GETTIMEOUT:
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return put_user(heartbeat, argp);
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@ -202,6 +202,7 @@ static long sbwdog_ioctl(struct file *file, unsigned int cmd,
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timeout = time;
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sbwdog_set(user_dog, timeout);
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sbwdog_pet(user_dog);
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/* Fall through */
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case WDIOC_GETTIMEOUT:
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/*
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@ -389,7 +389,7 @@ static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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if (wdt_set_heartbeat(new_heartbeat))
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return -EINVAL;
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wdt_ping();
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/* Fall */
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/* Fall through */
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case WDIOC_GETTIMEOUT:
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return put_user(heartbeat, p);
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default:
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