blk_queue_split() has become compulsory from .submit_bio -- regardless
of whether it is recursing. Update DM core to always call
blk_queue_split().
dm_queue_split() is removed because __split_and_process_bio() handles
splitting as needed.
Signed-off-by: Mike Snitzer <snit...@redhat.com>
---
drivers/md/dm.c | 45 +--------------------------------------------
1 file changed, 1 insertion(+), 44 deletions(-)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index fb0255d25e4b..0bae9f26dc8e 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1530,22 +1530,6 @@ static int __send_write_zeroes(struct clone_info *ci,
struct dm_target *ti)
return __send_changing_extent_only(ci, ti,
get_num_write_zeroes_bios(ti));
}
-static bool is_abnormal_io(struct bio *bio)
-{
- bool r = false;
-
- switch (bio_op(bio)) {
- case REQ_OP_DISCARD:
- case REQ_OP_SECURE_ERASE:
- case REQ_OP_WRITE_SAME:
- case REQ_OP_WRITE_ZEROES:
- r = true;
- break;
- }
-
- return r;
-}
-
static bool __process_abnormal_io(struct clone_info *ci, struct dm_target *ti,
int *result)
{
@@ -1723,23 +1707,6 @@ static blk_qc_t __process_bio(struct mapped_device *md,
struct dm_table *map,
return ret;
}
-static void dm_queue_split(struct mapped_device *md, struct dm_target *ti,
struct bio **bio)
-{
- unsigned len, sector_count;
-
- sector_count = bio_sectors(*bio);
- len = min_t(sector_t, max_io_len((*bio)->bi_iter.bi_sector, ti),
sector_count);
-
- if (sector_count > len) {
- struct bio *split = bio_split(*bio, len, GFP_NOIO,
&md->queue->bio_split);
-
- bio_chain(split, *bio);
- trace_block_split(md->queue, split, (*bio)->bi_iter.bi_sector);
- submit_bio_noacct(*bio);
- *bio = split;
- }
-}
-
static blk_qc_t dm_process_bio(struct mapped_device *md,
struct dm_table *map, struct bio *bio)
{
@@ -1759,17 +1726,7 @@ static blk_qc_t dm_process_bio(struct mapped_device *md,
}
}
- /*
- * If in ->queue_bio we need to use blk_queue_split(), otherwise
- * queue_limits for abnormal requests (e.g. discard, writesame, etc)
- * won't be imposed.
- */
- if (current->bio_list) {
- if (is_abnormal_io(bio))
- blk_queue_split(&bio);
- else
- dm_queue_split(md, ti, &bio);
- }
+ blk_queue_split(&bio);
if (dm_get_md_type(md) == DM_TYPE_NVME_BIO_BASED)
return __process_bio(md, map, bio, ti);
--
2.15.0
--
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