commit a3bd77567cae6af700dcd245148befc73fc89a50
author Christoph Hellwig <hch@lst.de> Tue May 27 20:59:48 2014 +0200
committer Jens Axboe <axboe@fb.com> Wed May 28 09:49:23 2014 -0600
tree 465934c4f1fb0687da5d862e5221d54c0d34eb2f
parent 5dee857720db15e2c8ef0c03f7eeac00c4c63cb2

blk-mq: remove blk_mq_wait_for_tags

The current logic for blocking tag allocation is rather confusing, as we
first allocated and then free again a tag in blk_mq_wait_for_tags, just
to attempt a non-blocking allocation and then repeat if someone else
managed to grab the tag before us.

Instead change blk_mq_alloc_request_pinned to simply do a blocking tag
allocation itself and use the request we get back from it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>