diff options
| author | Christoph Hellwig <hch@lst.de> | 2022-06-14 09:48:26 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-06-17 07:31:05 -0600 |
| commit | 99d055b4fd4bbb309c6cdb51a0d420669f777944 (patch) | |
| tree | 78067608566f43cf1bf92af677150729eb8e2e10 /block/blk-mq-debugfs.c | |
| parent | 5cf9c91ba927119fc6606b938b1895bb2459d3bc (diff) | |
block: remove per-disk debugfs files in blk_unregister_queue
The block debugfs files are created in blk_register_queue, which is
called by add_disk and use a naming scheme based on the disk_name.
After del_gendisk returns that name can be reused and thus we must not
leave these debugfs files around, otherwise the kernel is unhappy
and spews messages like:
Directory XXXXX with parent 'block' already present!
and the newly created devices will not have working debugfs files.
Move the unregistration to blk_unregister_queue instead (which matches
the sysfs unregistration) to make sure the debugfs life time rules match
those of the disk name.
As part of the move also make sure the whole debugfs unregistration is
inside a single debugfs_mutex critical section.
Note that this breaks blktests block/002, which checks that the debugfs
directory has not been removed while blktests is running, but that
particular check should simply be removed from the test case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220614074827.458955-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-debugfs.c')
| -rw-r--r-- | block/blk-mq-debugfs.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index f0fcfe1387cb..4d1ce9ef4318 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -840,14 +840,6 @@ void blk_mq_debugfs_register_rqos(struct rq_qos *rqos) debugfs_create_files(rqos->debugfs_dir, rqos, rqos->ops->debugfs_attrs); } -void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q) -{ - lockdep_assert_held(&q->debugfs_mutex); - - debugfs_remove_recursive(q->rqos_debugfs_dir); - q->rqos_debugfs_dir = NULL; -} - void blk_mq_debugfs_register_sched_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx) { |