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| author | Hannes Reinecke <hare@suse.de> | 2020-08-19 18:20:21 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-09-04 00:20:46 +0300 |
| commit | 4d063237b92a4e8d99350ad05492a45009a3c78c (patch) | |
| tree | 7c8cb54444ab64989bd155212739ca7ba204dd27 /block/blk-mq-tag.c | |
| parent | 655ac30094da0d724ce66161f15675d30da89cd8 (diff) | |
| download | linux-4d063237b92a4e8d99350ad05492a45009a3c78c.tar.xz | |
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: Hannes Reinecke <hare@suse.de>
Signed-off-by: John Garry <john.garry@huawei.com>
Tested-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-tag.c')
| -rw-r--r-- | block/blk-mq-tag.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 32d82e23b095..c2c9f369d777 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -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) |