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blk-mq: handle already freed tags gracefully in blk_mq_free_rqs 

To simplify further changes allow for double calling blk_mq_free_rqs on
a queue.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
[hch: split out from a larger patch]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20220308055200.735835-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei 2022-03-08 06:51:48 +01:00 committed by Jens Axboe
parent 41fa722239
commit e02657ea7b
1 changed files with 3 additions and 0 deletions
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3
block/blk-mq.c
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@ -3071,6 +3071,9 @@ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
struct blk_mq_tags *drv_tags;
struct page *page;
if (list_empty(&tags->page_list))
return;
if (blk_mq_is_shared_tags(set->flags))
drv_tags = set->shared_tags;
else