From: Boris BREZILLON <b.brezillon@overkiz.com>
Date: Sun, 3 Nov 2013 17:52:42 +0000 (+0100)
Subject: watchdog: at91sam9_wdt: fix secs_to_ticks
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1444797fc178b58e91cf29a438efd05dd890d43a;p=openwrt%2Fstaging%2Fblogic.git

watchdog: at91sam9_wdt: fix secs_to_ticks

Fix the secs_to_ticks macro in case 0 is passed as an argument.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
---

diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index 9bd089ebb70f..65f469145950 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -51,7 +51,7 @@
 #define ticks_to_hz_rounddown(t)	((((t) + 1) * HZ) >> 8)
 #define ticks_to_hz_roundup(t)		(((((t) + 1) * HZ) + 255) >> 8)
 #define ticks_to_secs(t)		(((t) + 1) >> 8)
-#define secs_to_ticks(s)		(((s) << 8) - 1)
+#define secs_to_ticks(s)		((s) ? (((s) << 8) - 1) : 0)
 
 #define WDT_MR_RESET	0x3FFF2FFF