md: MD_RECOVERY_NEEDED is set for mddev->recovery

Fixes: 90f5f7ad("md: Wait for md_check_recovery before attempting device
removal.")
Reviewed-by: NNeilBrown <neilb@suse.com>
Signed-off-by: NShaohua Li <shli@fb.com>

drivers/md/md.c

@@ -6856,7 +6856,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
 		/* need to ensure recovery thread has run */
 		wait_event_interruptible_timeout(mddev->sb_wait,
 						 !test_bit(MD_RECOVERY_NEEDED,
-							   &mddev->flags),
+							   &mddev->recovery),
 						 msecs_to_jiffies(5000));
 	if (cmd == STOP_ARRAY || cmd == STOP_ARRAY_RO) {
 		/* Need to flush page cache, and ensure no-one else opens