watchdog: implement error handling in lockup_detector_suspend()

lockup_detector_suspend() now handles errors from watchdog_park_threads().

Signed-off-by: Ulrich Obergfell <uobergfe@redhat.com>
Reviewed-by: Aaron Tomlin <atomlin@redhat.com>
Acked-by: Don Zickus <dzickus@redhat.com>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 704f93317666..e8b19db9c14a 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -707,6 +707,11 @@ int lockup_detector_suspend(void)
 
         if (ret == 0)
                 watchdog_suspended++;
+        else {
+                watchdog_disable_all_cpus();
+                pr_err("Failed to suspend lockup detectors, disabled\n");
+                watchdog_enabled = 0;
+        }
 
         mutex_unlock(&watchdog_proc_mutex);