Re: [PATCH v3 00/10] PCI: endpoint: pci-epf-vntb / NTB: epf: Enable per-doorbell bit handling

[Koichiro Den]

On Wed, Mar 25, 2026 at 07:23:37AM +0100, Niklas Cassel wrote:
> Hello Koichiro,
> 
> On Tue, Mar 24, 2026 at 12:43:53AM +0900, Koichiro Den wrote:
> > 
> > - configfs knobs mutability and bounds checking, including (but not limited to)
> >   db_count.
> >   In my opinion, allowing updates after .bind() looks questionable, and
> >   returning -EBUSY once bound seems more appropriate. I'm leaning toward
> >   handling this as a separate hardening series.
> 
> This is in line with what we did for pci-epf-test, see commit:
> ffcc4850a161 ("PCI: endpoint: pci-epf-test: Allow overriding default BAR sizes")
> 
> but we return EOPNOTSUPP instead of EBUSY.

Yes, I remember you were discussing this with Mani in another thread. For
consistency, we should use -EOPNOTSUPP here as well. Thanks for the reminder.

Best regards,
Koichiro

> 
> 
> Kind regards,
> Niklas