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authorHannes Reinecke <hare@suse.de>2020-08-19 23:20:21 +0800
committerJens Axboe <axboe@kernel.dk>2020-09-03 15:20:46 -0600
commit4d063237b92a4e8d99350ad05492a45009a3c78c (patch)
tree7c8cb54444ab64989bd155212739ca7ba204dd27 /block
parent655ac30094da0d724ce66161f15675d30da89cd8 (diff)
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')
-rw-r--r--block/blk-mq-tag.c18
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)