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| author | Bart Van Assche <bart.vanassche@wdc.com> | 2018-01-17 22:48:10 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-01-18 22:54:44 +0300 |
| commit | 2c2086afc2b8b974fac32cb028e73dc27bfae442 (patch) | |
| tree | 0a9d392612cbbdb0d3dcdf9190444d1964eeb962 /block/blk-throttle.c | |
| parent | 14a23498ba97683c6790b1bcd8b2cdfe9ad99797 (diff) | |
| download | linux-2c2086afc2b8b974fac32cb028e73dc27bfae442.tar.xz | |
block: Protect less code with sysfs_lock in blk_{un,}register_queue()
The __blk_mq_register_dev(), blk_mq_unregister_dev(),
elv_register_queue() and elv_unregister_queue() calls need to be
protected with sysfs_lock but other code in these functions not.
Hence protect only this code with sysfs_lock. This patch fixes a
locking inversion issue in blk_unregister_queue() and also in an
error path of blk_register_queue(): it is not allowed to hold
sysfs_lock around the kobject_del(&q->kobj) call.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-throttle.c')
0 files changed, 0 insertions, 0 deletions