Re: [PATCH v6 4/5] PCI: only return true when dev io state is really changed

[Sinan Kaya]

On 9/30/2020 3:05 AM, Ethan Zhao wrote:
> When uncorrectable error happens, AER driver and DPC driver interrupt
> handlers likely call
> 
>    pcie_do_recovery()
>    ->pci_walk_bus()
>      ->report_frozen_detected()
> 
> with pci_channel_io_frozen the same time.

We need some more data on this. If DPC is supported by HW, errors
should be triggered by DPC not AER.

If I remember right, there is a register that tells which AER errors
should be handled by DPC.