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virtio_blk: fix race at module removal 

If a device appears while module is being removed,
driver will get a callback after we've given up
on the major number.

In theory this means this major number can get reused
by something else, resulting in a conflict.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Michael S. Tsirkin 2014-10-23 18:57:19 +03:00
parent 393c525b5b
commit 38f37b578f
1 changed files with 1 additions and 1 deletions
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2
drivers/block/virtio_blk.c
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@ -884,8 +884,8 @@ out_destroy_workqueue:
static void __exit fini(void)
{
unregister_blkdev(major, "virtblk");
unregister_virtio_driver(&virtio_blk);
unregister_blkdev(major, "virtblk");
destroy_workqueue(virtblk_wq);
}
module_init(init);