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dm: fix comment in dm_process_bio()

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Refer to the correct function (->submit_bio instead of ->queue_bio).
Also, add details about why using blk_queue_split() isn't needed for
dm_wq_work()'s call to dm_process_bio().

Fixes: c62b37d96b6eb ("block: move ->make_request_fn to struct block_device_operations")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2020-09-21 19:08:30 -04:00
parent ee1dfad532
commit cf9c378655
1 changed files with 3 additions and 1 deletions
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4
drivers/md/dm.c
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@ -1744,9 +1744,11 @@ static blk_qc_t dm_process_bio(struct mapped_device *md,
} }
/* /*
* If in ->queue_bio we need to use blk_queue_split(), otherwise * If in ->submit_bio we need to use blk_queue_split(), otherwise
* queue_limits for abnormal requests (e.g. discard, writesame, etc) * queue_limits for abnormal requests (e.g. discard, writesame, etc)
* won't be imposed. * won't be imposed.
* If called from dm_wq_work() for deferred bio processing, bio
* was already handled by following code with previous ->submit_bio.
*/ */
if (current->bio_list) { if (current->bio_list) {
if (is_abnormal_io(bio)) if (is_abnormal_io(bio))