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[ARM] 3744/1: MMC: mmcqd gets stuck when block queue is plugged

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Patch from Juha [l

When the block queue is plugged, mq->req must be set to NULL.
Otherwise mq->req might be left non-NULL, even though mmcqd is
not processing a request, thus preventing the MMC queue thread from
being woken up when new requests do arrive.

Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Juha [l 2006-08-06 09:58:22 +01:00 committed by Russell King
parent f5d635f649
commit c723e08af1
1 changed files with 2 additions and 1 deletions
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3
drivers/mmc/mmc_queue.c
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@ -79,7 +79,8 @@ static int mmc_queue_thread(void *d)
spin_lock_irq(q->queue_lock);
set_current_state(TASK_INTERRUPTIBLE);
if (!blk_queue_plugged(q))
mq->req = req = elv_next_request(q);
req = elv_next_request(q);
mq->req = req;
spin_unlock_irq(q->queue_lock);
if (!req) {