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Subject[PATCH 2/3] watchdog: Fix sysctl consistency
Date
From: Marcin Slusarz <marcin.slusarz@gmail.com>

If it was not possible to enable watchdog for any cpu, switch watchdog_enabled
back to 0, because it's visible via kernel.watchdog sysctl.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: stable@kernel.org
Signed-off-by: Don Zickus <dzickus@redhat.com>
---
kernel/watchdog.c | 13 +++++++------
1 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 7d4213e..38af39a 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -429,9 +429,6 @@ static int watchdog_enable(int cpu)
wake_up_process(p);
}

- /* if any cpu succeeds, watchdog is considered enabled for the system */
- watchdog_enabled = 1;
-
return 0;
}

@@ -459,12 +456,16 @@ static void watchdog_disable(int cpu)
static void watchdog_enable_all_cpus(void)
{
int cpu;
- int result = 0;
+
+ watchdog_enabled = 0;

for_each_online_cpu(cpu)
- result += watchdog_enable(cpu);
+ if (!watchdog_enable(cpu))
+ /* if any cpu succeeds, watchdog is considered
+ enabled for the system */
+ watchdog_enabled = 1;

- if (result)
+ if (!watchdog_enabled)
printk(KERN_ERR "watchdog: failed to be enabled on some cpus\n");

}
--
1.7.3.4


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