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

[Dan Williams]

On Tue, Nov 2, 2021 at 5:10 PM Luis Chamberlain <mcgrof@xxxxxxxxxx> wrote:
>
> On Fri, Oct 15, 2021 at 05:13:48PM -0700, Dan Williams wrote:
> > On Fri, Oct 15, 2021 at 4:53 PM Luis Chamberlain <mcgrof@xxxxxxxxxx> 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.
>
> Curious if are you going to nuking it on v5.16? Otherwise it would stand
> in the way of the last few patches to add __must_check for the final
> add_disk() error handling changes.

True, I don't think I can get it nuked in time, so you can add my
Reviewed-by for this one.