linux-kernel - Re: [PATCH 0/4] Address error and recovery for AER and DPC

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Message-ID: <25e27773fd3bd15b22432e6db6f156dc@codeaurora.org>
Date:   Fri, 29 Dec 2017 10:45:55 +0530
From:   poza@...eaurora.org
To:     Keith Busch <keith.busch@...el.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dongdong Liu <liudongdong3@...wei.com>,
        Gabriele Paoloni <gabriele.paoloni@...wei.com>,
        Wei Zhang <wzhang@...com>, Sinan Kaya <okaya@...eaurora.org>,
        Timur Tabi <timur@...eaurora.org>
Subject: Re: [PATCH 0/4] Address error and recovery for AER and DPC

On 2017-12-28 23:04, Keith Busch wrote:
> On Wed, Dec 27, 2017 at 02:20:18AM -0800, Oza Pawandeep wrote:
>> DPC should enumerate the devices after recovering the link, which is
>> achieved by implementing error_resume callback.
> 
> Wouldn't that race with the link-up event that pciehp currently 
> handles?

It is with pci_lock_rescan_remove().
I was able to test with and without pciehp on our platform, and things 
seemed to be okay.

Regards,
Oza.