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| author | Christoph Hellwig <hch@lst.de> | 2022-06-14 11:09:30 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-06-27 14:29:11 +0200 |
| commit | c39493222e41098cd15d11f972d16e943919506d (patch) | |
| tree | 6651b2dc778ac1d9093a22b93e10af38a10c35b9 /drivers/md/dm.c | |
| parent | block: factor out a chunk_size_left helper (diff) | |
| download | linux-c39493222e41098cd15d11f972d16e943919506d.tar.xz linux-c39493222e41098cd15d11f972d16e943919506d.zip | |
dm: open code blk_max_size_offset in max_io_len
max_io_len always passes an explicitly non-zero chunk_sectors into
blk_max_size_offset. That means much of blk_max_size_offset is not
needed and can be open coded to simplify the code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Link: https://lore.kernel.org/r/20220614090934.570632-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to '')
| -rw-r--r-- | drivers/md/dm.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 2b75f1ef7386..4c04a980fcd9 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1086,23 +1086,18 @@ static sector_t max_io_len(struct dm_target *ti, sector_t sector) { sector_t target_offset = dm_target_offset(ti, sector); sector_t len = max_io_len_target_boundary(ti, target_offset); - sector_t max_len; /* * Does the target need to split IO even further? * - varied (per target) IO splitting is a tenet of DM; this * explains why stacked chunk_sectors based splitting via - * blk_max_size_offset() isn't possible here. So pass in - * ti->max_io_len to override stacked chunk_sectors. + * blk_queue_split() isn't possible here. */ - if (ti->max_io_len) { - max_len = blk_max_size_offset(ti->table->md->queue, - target_offset, ti->max_io_len); - if (len > max_len) - len = max_len; - } - - return len; + if (!ti->max_io_len) + return len; + return min_t(sector_t, len, + min(queue_max_sectors(ti->table->md->queue), + blk_chunk_sectors_left(target_offset, ti->max_io_len))); } int dm_set_target_max_io_len(struct dm_target *ti, sector_t len) |