linux-kernel - Re: [PATCH v3 1/1] PCI/ERR: Fix reset logic in pcie_do

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Date:   Sun, 11 Oct 2020 22:13:54 -0700
From:   "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     Sinan Kaya <okaya@...nel.org>, Bjorn Helgaas <helgaas@...nel.org>
Cc:     bhelgaas@...gle.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, ashok.raj@...el.com,
        Jay Vosburgh <jay.vosburgh@...onical.com>
Subject: Re: [PATCH v3 1/1] PCI/ERR: Fix reset logic in pcie_do_recovery()
 call

Hi Sinan,

On 9/28/20 11:32 AM, Kuppuswamy, Sathyanarayanan wrote:
> 
> 
> On 9/28/20 11:25 AM, Sinan Kaya wrote:
>> On 9/28/2020 2:02 PM, Sinan Kaya wrote:
>>> Since there is no state restoration for FATAL errors, I am wondering
>>> whether
>>> calls to ->error_detected(), ->mmio_enabled() and ->slot_reset() are
>>> required?
>>
>> I also would like to ask someone closer to the spec language double
>> check this.
>>
>> When we recover the link at the end of the DPC handler, what is the
>> expected state of the endpoint?
>>
>> Is it a some kind of a reset like secondary bus reset? (I assumed this
>>   one)
> I think it will be in reset state.
>>
>> Undefined?
>>
>> or just plain link recovery with everything else as intact as it used
>> to be?
>>
> 

Please check the following version. It should fix most of the reset issues
properly.

https://lore.kernel.org/linux-pci/5c5bca0bdb958e456176fe6ede10ba8f838fbafc.1602263264.git.sathyanarayanan.kuppuswamy@linux.intel.com/T/#t

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer