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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>
This commit is contained in:
Kiyoshi Ueda 2008-01-28 10:34:20 +01:00 committed by Jens Axboe
parent ea6f06f416
commit 5e36bb6ee8
2 changed files with 15 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/ide/ide-cd.c
View File

@ -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

25
drivers/ide/ide-io.c
View File

@ -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);
}