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

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Date:   Mon, 28 Sep 2020 11:32:19 -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



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?
> 

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer