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block: convert to dequeueing model (easy ones)

Browse source 
plat-omap/mailbox, floppy, viocd, mspro_block, i2o_block and
mmc/card/queue are already pretty close to dequeueing model and can be
converted with simple changes.  Convert them.

While at it,

* xen-blkfront: !fs check moved downwards to share dequeue call with
  normal path.

* mspro_block: __blk_end_request(..., blk_rq_cur_byte()) converted to
  __blk_end_request_cur()

* mmc/card/queue: loop of __blk_end_request() converted to
  __blk_end_request_all()

[ Impact: dequeue in-flight request ]

Signed-off-by: Tejun Heo <[email protected]>
Cc: Rusty Russell <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Cc: Alex Dubov <[email protected]>
Cc: Markus Lidel <[email protected]>
Cc: Pierre Ossman <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Tejun Heo 2009-05-08 11:54:15 +09:00 • committed by Jens Axboe
commit 296b2f6ae6
7 changed files with 36 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

12
drivers/mmc/card/queue.c
View file

@ -54,8 +54,11 @@ static int mmc_queue_thread(void *d)
spin_lock_irq(q->queue_lock);
set_current_state(TASK_INTERRUPTIBLE);
if (!blk_queue_plugged(q))
if (!blk_queue_plugged(q)) {
req = elv_next_request(q);
if (req)
blkdev_dequeue_request(req);
}
mq->req = req;
spin_unlock_irq(q->queue_lock);
@ -88,15 +91,12 @@ static void mmc_request(struct request_queue *q)
{
struct mmc_queue *mq = q->queuedata;
struct request *req;
int ret;
if (!mq) {
printk(KERN_ERR "MMC: killing requests for dead queue\n");
while ((req = elv_next_request(q)) != NULL) {
do {
ret = __blk_end_request(req, -EIO,
blk_rq_cur_bytes(req));
} while (ret);
blkdev_dequeue_request(req);
__blk_end_request_all(req, -EIO);
}
return;
}