lkml.org 
[lkml]   [2020]   [Sep]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 1/1] PCI/ERR: Fix reset logic in pcie_do_recovery() call
From
Date


On 9/23/20 7:16 PM, Sinan Kaya wrote:
> 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().
Yes. But the affected device/drivers cleanup during error recovery
is handled by hotplug handler. So we are facing issue when dealing
with non hotplug capable ports.
>

--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer

\
 
 \ /
  Last update: 2020-09-24 04:51    [W:0.046 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site