The MMC block driver services requests one at a time and in strict order. Indicate this to the block layer so that it can handle barriers in an efficient manner. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
@@ -131,6 +131,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
mq->req = NULL;
blk_queue_prep_rq(mq->queue, mmc_prep_request);
+ blk_queue_ordered(mq->queue, QUEUE_ORDERED_DRAIN, NULL);
#ifdef CONFIG_MMC_BLOCK_BOUNCE
if (host->max_hw_segs == 1) {