1 files changed, 13 insertions, 2 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 3ca3cfb03a7e..f19b874753a9 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -167,6 +167,15 @@ void md_new_event(mddev_t *mddev)
 }
 EXPORT_SYMBOL_GPL(md_new_event);
 
+/* Alternate version that can be called from interrupts
+ * when calling sysfs_notify isn't needed.
+ */
+void md_new_event_inintr(mddev_t *mddev)
+{
+        atomic_inc(&md_event_count);
+        wake_up(&md_event_waiters);
+}
+
 /*
  * Enables to iterate over all existing md arrays
  * all_mddevs_lock protects this list.
@@ -4149,7 +4158,7 @@ void md_error(mddev_t *mddev, mdk_rdev_t *rdev)
         set_bit(MD_RECOVERY_INTR, &mddev->recovery);
         set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
         md_wakeup_thread(mddev->thread);
-        md_new_event(mddev);
+        md_new_event_inintr(mddev);
 }
 
 /* seq_file implementation /proc/mdstat */
@@ -5028,8 +5037,10 @@ static int md_notify_reboot(struct notifier_block *this,
                 printk(KERN_INFO "md: stopping all md devices.\n");
 
                 ITERATE_MDDEV(mddev,tmp)
-                        if (mddev_trylock(mddev))
+                        if (mddev_trylock(mddev)) {
                                 do_md_stop (mddev, 1);
+                                mddev_unlock(mddev);
+                        }
                 /*
                  * certain more exotic SCSI devices are known to be
                  * volatile wrt too early system reboots. While the