md: add support for raising dm events.

dm uses scheduled work to raise events to user-space.
So allow md device to have work_structs and schedule them on an error.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 012482a900fc..f8775699e15a 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6068,6 +6068,8 @@ 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);
+        if (mddev->event_work.func)
+                schedule_work(&mddev->event_work);
         md_new_event_inintr(mddev);
 }