dm raid: fix use of wrong status char during resynchronization

During a resynchronization, device status char 'a' is output on the raid
status line for every device of a RAID set.  It changes from 'a' to 'A'
(unless device failure) when the resynchronization completes.

Interrupting and restarting a resynchronization, by reloading the DM
table, erroneously lead to status char 'A'.

Fix this by avoiding setting the MD_RECOVERY_REQUESTED flag in
raid_preresume().

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm-raid.c

@@ -3578,7 +3578,6 @@ static int raid_preresume(struct dm_target *ti)
 	/* Be prepared for mddev_resume() in raid_resume() */
 	set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
 	if (mddev->recovery_cp && mddev->recovery_cp < MaxSector) {
-		set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
 		set_bit(MD_RECOVERY_SYNC, &mddev->recovery);
 		mddev->resync_min = mddev->recovery_cp;
 	}