[systemd-devel] [PATCH] md: Drop sending a change uevent when stopping

[Sebastian Parschauer]

When stopping an MD device, then its device node /dev/mdX may still
exist afterwards or it is recreated by udev. The next open() call
can lead to creation of an inoperable MD device. The reason for
this is that a change event (KOBJ_CHANGE) is sent to udev which
races against the remove event (KOBJ_REMOVE) from md_free().
So drop sending the change event.

A change is likely also required in mdadm as many versions send the
change event to udev as well.

Signed-off-by: Sebastian Parschauer <sebastian.riemer at profitbricks.com>
---
 drivers/md/md.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index e55e6cf..464627b 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5671,7 +5671,6 @@ static int do_md_stop(struct mddev *mddev, int mode,
 		export_array(mddev);
 
 		md_clean(mddev);
-		kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);
 		if (mddev->hold_active == UNTIL_STOP)
 			mddev->hold_active = 0;
 	}
-- 
1.7.9.5