[PATCH 06/13] nvdimm/blk: avoid calling del_gendisk() on early failures

[Dan Williams]

On Fri, Oct 15, 2021 at 4:53 PM Luis Chamberlain <mcgrof at kernel.org> wrote:
>
> If nd_integrity_init() fails we'd get del_gendisk() called,
> but that's not correct as we should only call that if we're
> done with device_add_disk(). Fix this by providing unwinding
> prior to the devm call being registered and moving the devm
> registration to the very end.
>
> This should fix calling del_gendisk() if nd_integrity_init()
> fails. I only spotted this issue through code inspection. It
> does not fix any real world bug.
>

Just fyi, I'm preparing patches to delete this driver completely as it
is unused by any shipping platform. I hope to get that removal into
v5.16.