On Wed, Jul 20, 2022 at 03:05:41PM +0200, Christoph Hellwig wrote:
> To undo the all initialization from blk_mq_init_allocated_queue in case
> of a probe failure where add_disk is never called we have to call
> blk_mq_exit_queue from put_disk.
>
> This relies on the fact that drivers always call blk_mq_free_tag_set
> after calling put_disk in the probe error path if they have a gendisk
> at all.
>
> We should be doing this in general, but can't do it for the normal
> teardown case (yet) as the tagset can be gone by the time the disk is
> released once it was added. I hope to sort this out properly eventually
> but for now this isolated hack will do it.
>
> Fixes: 6f8191fdf41d ("block: simplify disk shutdown")
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>
--
Ming
