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block: simplify blk_init_allocated_queue

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Return an errno value instead of the passed in queue so that the callers
don't have to keep track of two queues, and move the assignment of the
request_fn and lock to the caller as passing them as argument doesn't
simplify anything.  While we're at it also remove two pointless NULL
assignments, given that the request structure is zeroed on allocation.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Reviewed-by: Martin K. Petersen <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2017-01-03 14:52:44 +03:00 • committed by Jens Axboe
commit 5ea708d15a
3 changed files with 18 additions and 26 deletions
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3
drivers/md/dm-rq.c
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@ -823,7 +823,8 @@ static void dm_old_request_fn(struct request_queue *q)
int dm_old_init_request_queue(struct mapped_device *md)
{
/* Fully initialize the queue */
if (!blk_init_allocated_queue(md->queue, dm_old_request_fn, NULL))
md->queue->request_fn = dm_old_request_fn;
if (blk_init_allocated_queue(md->queue) < 0)
return -EINVAL;
/* disable dm_old_request_fn's merge heuristic by default */