diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-01-22 20:32:46 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-01-28 01:08:35 +0300 |
| commit | eb8db831be80692bf4bda3dfc55001daf64ec299 (patch) | |
| tree | 632bf3e0d7d7d793e59f61d6f3f9ab38dadc5523 /drivers/md/dm-target.c | |
| parent | 4bf58435fae39ec2ea01a2ff9934d377add234b1 (diff) | |
| download | linux-eb8db831be80692bf4bda3dfc55001daf64ec299.tar.xz | |
dm: always defer request allocation to the owner of the request_queue
DM already calls blk_mq_alloc_request on the request_queue of the
underlying device if it is a blk-mq device. But now that we allow drivers
to allocate additional data and initialize it ahead of time we need to do
the same for all drivers. Doing so and using the new cmd_size
infrastructure in the block layer greatly simplifies the dm-rq and mpath
code, and should also make arbitrary combinations of SQ and MQ devices
with SQ or MQ device mapper tables easily possible as a further step.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/md/dm-target.c')
| -rw-r--r-- | drivers/md/dm-target.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/drivers/md/dm-target.c b/drivers/md/dm-target.c index 710ae28fd618..43d3445b121d 100644 --- a/drivers/md/dm-target.c +++ b/drivers/md/dm-target.c @@ -131,12 +131,6 @@ static int io_err_map(struct dm_target *tt, struct bio *bio) return -EIO; } -static int io_err_map_rq(struct dm_target *ti, struct request *clone, - union map_info *map_context) -{ - return -EIO; -} - static int io_err_clone_and_map_rq(struct dm_target *ti, struct request *rq, union map_info *map_context, struct request **clone) @@ -161,7 +155,6 @@ static struct target_type error_target = { .ctr = io_err_ctr, .dtr = io_err_dtr, .map = io_err_map, - .map_rq = io_err_map_rq, .clone_and_map_rq = io_err_clone_and_map_rq, .release_clone_rq = io_err_release_clone_rq, .direct_access = io_err_direct_access, |