[PATCH v2 0/4] PCI: dwc: Link Up IRQ fixes

[Manivannan Sadhasivam]

On Mon, May 19, 2025 at 11:44:17AM +0200, Niklas Cassel wrote:
> On Fri, May 16, 2025 at 06:48:59PM +0000, Laszlo Fiat wrote:
> > 
> > I have compiled a vanilla 6.12.28, that booted fine, as expeced. Then compiled a  version with the patch directly above.
> > 
> > >  We expect the link to come up, but that you will not be able to mount rootfs.
> > >  
> > 
> > That is exactly what happened. 
> > 
> > >  If that is the case, we are certain that the this patch series is 100% needed
> > >  for your device to have the same functional behavior as before.
> > 
> > That is the case.
> 
> Laszlo,
> 
> Thank you for verifying!
> 
> > 
> > Bye,
> > 
> > Laszlo Fiat 
> 
> Mani, Krzysztof,
> 
> It does indeed seem like the reason for this regression is that this weird
> NVMe drive requires some additional time after link up to be ready.
> 
> This series does re-add a similar delay, but in the 'link up' IRQ thread,
> so even with this series, things are nicer than before (where we had an
> unconditional delay after starting the link).
> 
> Do you require any additional changes?
> 

No. Sorry for the delay in getting back. I was at Linaro Connect last week and
had to take some vacation for the first half of this week.

It is fine with me to add the delay only in the Rockchip platform where the
issue was reported (next time please mention the issue that triggered the series
in the cover letter). But I do not want to add the same in Qcom platform as the
delay is not strictly required as per the spec (if I understood it properly).

So I'll merge rest of the 3 patches.

- Mani

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