diff options
Diffstat (limited to 'drivers/block/umem.c')
| -rw-r--r-- | drivers/block/umem.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/block/umem.c b/drivers/block/umem.c index aa2712060bf..eb0d8216f55 100644 --- a/drivers/block/umem.c +++ b/drivers/block/umem.c @@ -513,6 +513,21 @@ static void process_page(unsigned long data) } } +static void mm_unplug(struct blk_plug_cb *cb, bool from_schedule) +{ + struct cardinfo *card = cb->data; + + spin_lock_irq(&card->lock); + activate(card); + spin_unlock_irq(&card->lock); + kfree(cb); +} + +static int mm_check_plugged(struct cardinfo *card) +{ + return !!blk_check_plugged(mm_unplug, card, sizeof(struct blk_plug_cb)); +} + static void mm_make_request(struct request_queue *q, struct bio *bio) { struct cardinfo *card = q->queuedata; @@ -523,6 +538,8 @@ static void mm_make_request(struct request_queue *q, struct bio *bio) *card->biotail = bio; bio->bi_next = NULL; card->biotail = &bio->bi_next; + if (bio->bi_rw & REQ_SYNC || !mm_check_plugged(card)) + activate(card); spin_unlock_irq(&card->lock); return; |