6.6-stable review patch. If anyone has any objections, please let me know.
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From: Zheng Qixing zhengqixing@huawei.com
[ Upstream commit 40f2eb9b531475dd01b683fdaf61ca3cfd03a51e ]
When registering a queue fails after blk_mq_sysfs_register() is successful but the function later encounters an error, we need to clean up the blk_mq_sysfs resources.
Add the missing blk_mq_sysfs_unregister() call in the error path to properly clean up these resources and prevent a memory leak.
Fixes: 320ae51feed5 ("blk-mq: new multi-queue block IO queueing mechanism") Signed-off-by: Zheng Qixing zhengqixing@huawei.com Reviewed-by: Christoph Hellwig hch@lst.de Reviewed-by: Yu Kuai yukuai3@huawei.com Link: https://lore.kernel.org/r/20250412092554.475218-1-zhengqixing@huaweicloud.co... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/blk-sysfs.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 4990a19e60133..74839f6f2e0cb 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -854,6 +854,8 @@ int blk_register_queue(struct gendisk *disk) out_debugfs_remove: blk_debugfs_remove(disk); mutex_unlock(&q->sysfs_lock); + if (queue_is_mq(q)) + blk_mq_sysfs_unregister(disk); out_put_queue_kobj: kobject_put(&disk->queue_kobj); mutex_unlock(&q->sysfs_dir_lock);