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blk-mq: add helper allocating tagset->tags

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tagset->set is allocated from blk_mq_alloc_tag_set() rather than being
reallocated.  This patch added a helper to make its meaning explicitly
which is to allocate rather than to reallocate.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Minwoo Im
2020-12-05 00:20:53 +09:00
committed by Jens Axboe
parent 7aa390ec2d
commit 91cdf265b7
1 changed files with 7 additions and 1 deletions
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8
block/blk-mq.c
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@@ -3382,6 +3382,12 @@ static int blk_mq_realloc_tag_set_tags(struct blk_mq_tag_set *set,
return 0; return 0;
} }
static int blk_mq_alloc_tag_set_tags(struct blk_mq_tag_set *set,
int new_nr_hw_queues)
{
return blk_mq_realloc_tag_set_tags(set, 0, new_nr_hw_queues);
}
/* /*
* Alloc a tag set to be associated with one or more request queues. * Alloc a tag set to be associated with one or more request queues.
* May fail with EINVAL for various error conditions. May adjust the * May fail with EINVAL for various error conditions. May adjust the
@@ -3435,7 +3441,7 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set)
if (set->nr_maps == 1 && set->nr_hw_queues > nr_cpu_ids) if (set->nr_maps == 1 && set->nr_hw_queues > nr_cpu_ids)
set->nr_hw_queues = nr_cpu_ids; set->nr_hw_queues = nr_cpu_ids;
if (blk_mq_realloc_tag_set_tags(set, 0, set->nr_hw_queues) < 0) if (blk_mq_alloc_tag_set_tags(set, set->nr_hw_queues) < 0)
return -ENOMEM; return -ENOMEM;
ret = -ENOMEM; ret = -ENOMEM;