From 52e64db00e63d6005af3b23b794141b992153506 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Fran=C3=A7ois=20Tigeot?= <ftigeot@wolfpond.org>
Date: Thu, 3 May 2012 12:43:52 +0200
Subject: [PATCH] Kernel: do not manipulate watchdog list if empty

Suggested-by: Alex Hornung
---
 sys/kern/kern_wdog.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/kern/kern_wdog.c b/sys/kern/kern_wdog.c
index 7010eb05c9..f09f4d0221 100644
--- a/sys/kern/kern_wdog.c
+++ b/sys/kern/kern_wdog.c
@@ -95,6 +95,8 @@ wdog_reset_all(void *unused)
 	int period, min_period = INT_MAX;
 
 	spin_lock(&wdogmtx);
+	if (LIST_EMPTY(&wdoglist))
+		goto done;
 	LIST_FOREACH(wd, &wdoglist, link) {
 		period = wdog_reset(wd);
 		if (period < min_period)
@@ -105,6 +107,7 @@ wdog_reset_all(void *unused)
 
 	wdog_auto_period = min_period;
 
+done:
 	spin_unlock(&wdogmtx);
 }
 
-- 
2.41.0