Re: [PATCH v1 1/1] PCI: Enable INTx quirk for ATI PCIe-USB adapter

Andy Shevchenko
2022-03-15T10:09:53Z

On Mon, Mar 14, 2022 at 02:42:53PM -0500, Bjorn Helgaas wrote:
> On Mon, Mar 14, 2022 at 12:14:48PM +0200, Andy Shevchenko wrote:
> > ATI PCIe-USB adapter advertises MSI, but it doesn't work if INTx is disabled.
> > Enable the respective quirk as it's done for other ATI devices on this chipset,
> >
> > Fixes: 306c54d0edb6 ("usb: hcd: Try MSI interrupts on PCI devices")
>
> This is interesting because there must be a TON of these AMD/ATI SB600
> USB devices in the field, and 306c54d0edb6 was merged in July 2020 and
> appeared in v5.9.
>
> So why would we only get a report now, in February 2022? Is there
> some change more recent than 306c54d0edb6 that exposed this problem?

I think it's a rhetorical question. To me it's as simple as the latency
between getting the change into the kernel.

However, I'm a bit worried that in case of ATI there are not so many
platforms that are kept up-to-dated.

--
With Best Regards,
Andy Shevchenko