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| author | Ming Lei <tom.leiming@gmail.com> | 2013-12-26 21:31:37 +0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-12 16:22:42 +0700 |
| commit | 518d00b7498c5894be94545848d55e5b9c55749e (patch) | |
| tree | 841f92409aca75ab2eadea1955d96c33b107395a /drivers/block/null_blk.c | |
| parent | 228fdc083b017eaf90e578fa86fb1ecfd5ffae87 (diff) | |
| download | blackbird-op-linux-518d00b7498c5894be94545848d55e5b9c55749e.tar.gz blackbird-op-linux-518d00b7498c5894be94545848d55e5b9c55749e.zip | |
block: null_blk: fix queue leak inside removing device
When queue_mode is NULL_Q_MQ and null_blk is being removed,
blk_cleanup_queue() isn't called to cleanup queue, so the queue
allocated won't be freed.
This patch calls blk_cleanup_queue() for MQ to drain all pending
requests first and release the reference counter of queue kobject, then
blk_mq_free_queue() will be called in queue kobject's release handler
when queue kobject's reference counter drops to zero.
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block/null_blk.c')
| -rw-r--r-- | drivers/block/null_blk.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index a2e69d26266d..83a598ebb65a 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -425,10 +425,7 @@ static void null_del_dev(struct nullb *nullb) list_del_init(&nullb->list); del_gendisk(nullb->disk); - if (queue_mode == NULL_Q_MQ) - blk_mq_free_queue(nullb->q); - else - blk_cleanup_queue(nullb->q); + blk_cleanup_queue(nullb->q); put_disk(nullb->disk); kfree(nullb); } @@ -578,10 +575,7 @@ static int null_add_dev(void) disk = nullb->disk = alloc_disk_node(1, home_node); if (!disk) { queue_fail: - if (queue_mode == NULL_Q_MQ) - blk_mq_free_queue(nullb->q); - else - blk_cleanup_queue(nullb->q); + blk_cleanup_queue(nullb->q); cleanup_queues(nullb); err: kfree(nullb); |
