Re: [PATCH v3 1/1] PCI/ERR: Fix reset logic in pcie_do_recovery() call

Sinan Kaya
2020-09-24T02:16:35Z

On 9/23/2020 10:04 PM, Kuppuswamy, Sathyanarayanan wrote:
>> AFAIK, DLLSC is a requirement not optional. Why is this not supported by
>> non-hotplug ports?
> Its required for hotplug capable ports. Please check PCIe spec v5.0 sec
> 6.7.3.3.
>
> The Data Link Layer State Changed event provides an indication that the
> state of
> the Data Link Layer Link Active bit in the Link Status Register has
> changed.
> Support for Data Link Layer State Changed events and software
> notification of these
> events are required for hot-plug capable Downstream Ports.

I see. Can I assume that your system supports DPC?
DPC is supposed to recover the link via dpc_reset_link().