From 9ffdc6c37df131f89d52001e0ef03091b158826f Mon Sep 17 00:00:00 2001
From: Marcin Slusarz <marcin.slusarz@gmail.com>
Date: Fri, 28 Jan 2011 11:00:33 -0500
Subject: watchdog: Don't change watchdog state on read of sysctl

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
[ add {}'s to fix a warning ]
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: <stable@kernel.org>
LKML-Reference: <1296230433-6261-3-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 kernel/watchdog.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

(limited to 'kernel/watchdog.c')

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index c7e0049344b..f37f974aa81 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -493,10 +493,12 @@ int proc_dowatchdog_enabled(struct ctl_table *table, int write,
 {
 	proc_dointvec(table, write, buffer, length, ppos);
 
-	if (watchdog_enabled)
-		watchdog_enable_all_cpus();
-	else
-		watchdog_disable_all_cpus();
+	if (write) {
+		if (watchdog_enabled)
+			watchdog_enable_all_cpus();
+		else
+			watchdog_disable_all_cpus();
+	}
 	return 0;
 }
 
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