Commit 4d063237 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Jens Axboe

blk-mq: Free tags in blk_mq_init_tags() upon error

Since the tags are allocated in blk_mq_init_tags(), it's better practice
to free in that same function upon error, rather than a callee which is to
init the bitmap tags (blk_mq_init_tags()).

[jpg: Split from an earlier patch with a new commit message]
Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Tested-by: default avatarDouglas Gilbert <dgilbert@interlog.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 655ac300
......@@ -429,24 +429,22 @@ static int bt_alloc(struct sbitmap_queue *bt, unsigned int depth,
node);
}
static struct blk_mq_tags *blk_mq_init_bitmap_tags(struct blk_mq_tags *tags,
int node, int alloc_policy)
static int blk_mq_init_bitmap_tags(struct blk_mq_tags *tags,
int node, int alloc_policy)
{
unsigned int depth = tags->nr_tags - tags->nr_reserved_tags;
bool round_robin = alloc_policy == BLK_TAG_ALLOC_RR;
if (bt_alloc(&tags->bitmap_tags, depth, round_robin, node))
goto free_tags;
return -ENOMEM;
if (bt_alloc(&tags->breserved_tags, tags->nr_reserved_tags, round_robin,
node))
goto free_bitmap_tags;
return tags;
return 0;
free_bitmap_tags:
sbitmap_queue_free(&tags->bitmap_tags);
free_tags:
kfree(tags);
return NULL;
return -ENOMEM;
}
struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags,
......@@ -467,7 +465,11 @@ struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags,
tags->nr_tags = total_tags;
tags->nr_reserved_tags = reserved_tags;
return blk_mq_init_bitmap_tags(tags, node, alloc_policy);
if (blk_mq_init_bitmap_tags(tags, node, alloc_policy) < 0) {
kfree(tags);
return NULL;
}
return tags;
}
void blk_mq_free_tags(struct blk_mq_tags *tags)
......
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