block: convert to dequeueing model (easy ones)

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 <tj@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Cc: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 7a72e75d5c67..4b70f1e28347 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -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;
         }