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drbd: fix rmmod cleanup, remove _all_ debugfs entries 

If there are still resources defined, but "empty", no more volumes
or connections configured, they don't hold module reference counts,
so rmmod is possible.

To avoid DRBD leftovers in debugfs, we need to call our global
drbd_debugfs_cleanup() only after all resources have been cleaned up.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Lars Ellenberg 2017-08-29 10:20:41 +02:00 committed by Jens Axboe
parent be7445a381
commit 3f1a1b7cbb
1 changed files with 2 additions and 1 deletions
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3
drivers/block/drbd/drbd_main.c
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@ -2420,7 +2420,6 @@ static void drbd_cleanup(void)
destroy_workqueue(retry.wq);
drbd_genl_unregister();
drbd_debugfs_cleanup();
idr_for_each_entry(&drbd_devices, device, i)
drbd_delete_device(device);
@ -2431,6 +2430,8 @@ static void drbd_cleanup(void)
drbd_free_resource(resource);
}
drbd_debugfs_cleanup();
drbd_destroy_mempools();
unregister_blkdev(DRBD_MAJOR, "drbd");