blk_end_request: changing ide normal caller (take 4)

This patch converts "normal" parts of ide to use blk_end_request
interfaces.  Related 'uptodate' arguments are converted to 'error'.

The conversion of 'uptodate' to 'error' is done only for the internal
function, __ide_end_request().
ide_end_request() was not changed since it's exported and used
by many ide drivers.

With this patch, blkdev_dequeue_request() in __ide_end_request() is
moved to blk_end_request, since blk_end_request takes care of
dequeueing request like below:

	if (!list_empty(&rq->queuelist))
		blkdev_dequeue_request(rq);

In the case of ide,
  o 'dequeue' variable of __ide_end_request() is 1 only when the request
    is still linked to the queue (i.e. rq->queuelist is not empty)
  o 'dequeue' variable of __ide_end_request() is 0 only when the request
    has already been removed from the queue (i.e. rq->queuelist is empty)
So blk_end_request can handle it correctly although ide always run
thought the code above.

Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

2 files changed, 15 insertions, 16 deletions

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 44b033ec0ab0..282f1580fca9 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -655,9 +655,9 @@ static void cdrom_end_request (ide_drive_t *drive, int uptodate)
                                         BUG();
                         } else {
                                 spin_lock_irqsave(&ide_lock, flags);
-                                end_that_request_chunk(failed, 0,
-                                                        failed->data_len);
-                                end_that_request_last(failed, 0);
+                                if (__blk_end_request(failed, -EIO,
+                                                      failed->data_len))
+                                        BUG();
                                 spin_unlock_irqrestore(&ide_lock, flags);
                         }
                 } else
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 6f8f544392a8..e6bb9cf24e3d 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -58,15 +58,19 @@ static int __ide_end_request(ide_drive_t *drive, struct request *rq,
                              int uptodate, unsigned int nr_bytes, int dequeue)
 {
         int ret = 1;
+        int error = 0;
+
+        if (uptodate <= 0)
+                error = uptodate ? uptodate : -EIO;
 
         /*
          * if failfast is set on a request, override number of sectors and
          * complete the whole request right now
          */
-        if (blk_noretry_request(rq) && end_io_error(uptodate))
+        if (blk_noretry_request(rq) && error)
                 nr_bytes = rq->hard_nr_sectors << 9;
 
-        if (!blk_fs_request(rq) && end_io_error(uptodate) && !rq->errors)
+        if (!blk_fs_request(rq) && error && !rq->errors)
                 rq->errors = -EIO;
 
         /*
@@ -78,14 +82,9 @@ static int __ide_end_request(ide_drive_t *drive, struct request *rq,
                 ide_dma_on(drive);
         }
 
-        if (!end_that_request_chunk(rq, uptodate, nr_bytes)) {
-                add_disk_randomness(rq->rq_disk);
-                if (dequeue) {
-                        if (!list_empty(&rq->queuelist))
-                                blkdev_dequeue_request(rq);
+        if (!__blk_end_request(rq, error, nr_bytes)) {
+                if (dequeue)
                         HWGROUP(drive)->rq = NULL;
-                }
-                end_that_request_last(rq, uptodate);
                 ret = 0;
         }
 
@@ -290,9 +289,9 @@ static void ide_complete_pm_request (ide_drive_t *drive, struct request *rq)
                 drive->blocked = 0;
                 blk_start_queue(drive->queue);
         }
-        blkdev_dequeue_request(rq);
         HWGROUP(drive)->rq = NULL;
-        end_that_request_last(rq, 1);
+        if (__blk_end_request(rq, 0, 0))
+                BUG();
         spin_unlock_irqrestore(&ide_lock, flags);
 }
 
@@ -387,10 +386,10 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err)
         }
 
         spin_lock_irqsave(&ide_lock, flags);
-        blkdev_dequeue_request(rq);
         HWGROUP(drive)->rq = NULL;
         rq->errors = err;
-        end_that_request_last(rq, !rq->errors);
+        if (__blk_end_request(rq, (rq->errors ? -EIO : 0), 0))
+                BUG();
         spin_unlock_irqrestore(&ide_lock, flags);
 }