[PATCH v2 12/13] block: make __register_blkdev() return an error

[Luis Chamberlain]

On Wed, Nov 03, 2021 at 06:00:49PM +0100, Christoph Hellwig wrote:
> On Wed, Nov 03, 2021 at 09:44:53AM -0700, Luis Chamberlain wrote:
> > Here's the thing, prober call a form of add_disk(), and so do we want
> > to always ignore the errors on probe? If so we should document why that
> > is sane then. I think this approach is a bit more sane though.
> 
> I suspect the right thing is to just kill of ->probe.
> 
> The only thing it supports is pre-devtmpfs, pre-udev semantics that
> want to magically create disks when their pre-created device node
> is accesses.

That sounds like a possible userspace impact? And so not for v5.16 for
sure.

> But if we don't remove it, yes I think not reporting
> the error is best.  Just clean up whatever local resources were set
> up in the ->probe method and let the open fail without the need of
> passing on the actual error.

Alright, I'll do that and send a final v3 for the last 2 patches.

  Luis