Commit 10beafc1 authored by Mike Snitzer's avatar Mike Snitzer Committed by Jens Axboe
Browse files

block: change flush sequence list addition back to front add 



Commit 18741986 inadvertently changed the rq flush insertion
from a head to a tail insertion. Fix that back up.

Signed-off-by: default avatarMike Snitzer <msnitzer@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 7982e90c

block/blk-flush.c

+7 −4
Original line number Diff line number Diff line
@@ -140,13 +140,16 @@ static void mq_flush_run(struct work_struct *work) 
	blk_mq_insert_request(rq, false, true, false);

}



static bool blk_flush_queue_rq(struct request *rq)

static bool blk_flush_queue_rq(struct request *rq, bool add_front)

{

	if (rq->q->mq_ops) {

		INIT_WORK(&rq->mq_flush_work, mq_flush_run);

		kblockd_schedule_work(rq->q, &rq->mq_flush_work);

		return false;

	} else {

		if (add_front)

			list_add(&rq->queuelist, &rq->q->queue_head);

		else

			list_add_tail(&rq->queuelist, &rq->q->queue_head);

		return true;

	}
@@ -193,7 +196,7 @@ static bool blk_flush_complete_seq(struct request *rq, unsigned int seq, 


	case REQ_FSEQ_DATA:

		list_move_tail(&rq->flush.list, &q->flush_data_in_flight);

		queued = blk_flush_queue_rq(rq);

		queued = blk_flush_queue_rq(rq, true);

		break;



	case REQ_FSEQ_DONE:
@@ -326,7 +329,7 @@ static bool blk_kick_flush(struct request_queue *q) 
	q->flush_rq->rq_disk = first_rq->rq_disk;

	q->flush_rq->end_io = flush_end_io;



	return blk_flush_queue_rq(q->flush_rq);

	return blk_flush_queue_rq(q->flush_rq, false);

}



static void flush_data_end_io(struct request *rq, int error)