[PATCH] md: Make sure an interrupted resync doesn't seem to have completed.

From: NeilBrown <neilb@cse.unsw.edu.au>

If the raid1 or raid5 thread gets to run md_check_recovery after the recovery
thread has been interupted, but before do_md_stop completes, a spare drive
can be incorporated into an array befure it is up-to-date.

This patch corrects the relevant test.

drivers/md/md.c

@@ -3383,7 +3383,8 @@ void md_check_recovery(mddev_t *mddev)
 			/* resync has finished, collect result */
 			md_unregister_thread(mddev->sync_thread);
 			mddev->sync_thread = NULL;
-			if (!test_bit(MD_RECOVERY_ERR, &mddev->recovery)) {
+			if (!test_bit(MD_RECOVERY_ERR, &mddev->recovery) &&
+			    !test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
 				/* success...*/
 				/* activate any spares */
 				mddev->pers->spare_active(mddev);