watchdog: Don't change watchdog state on read of sysctl

commit 9ffdc6c37df131f89d52001e0ef03091b158826f upstream.

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>
LKML-Reference: <1296230433-6261-3-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index b4560a8..2886c03 100644 (file)
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -497,10 +497,12 @@ 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;
 }