linux-kernel - Re: [PATCH v3 3/3] PCI: Intel DC P3700 NVMe delay after FLR quirk

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Date:   Thu, 9 Aug 2018 14:35:53 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvme@...ts.infradead.org
Subject: Re: [PATCH v3 3/3] PCI: Intel DC P3700 NVMe delay after FLR quirk

On Tue, Jul 24, 2018 at 10:18:48AM -0600, Alex Williamson wrote:
> On Tue, 24 Jul 2018 10:14:46 -0600
> Alex Williamson <alex.williamson@...hat.com> wrote:
> 
> > Add a device specific reset for Intel DC P3700 NVMe device which
> > exhibits a timeout failure in drivers waiting for the ready status to
> > update after NVMe enable if the driver interacts with the device too
> > quickly after FLR.  As this has been observed in device assignment
> > scenarios, resolve this with a device specific reset quirk to add an
> > additional, heuristically determined, delay after the FLR completes.
> > 
> > Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
> > ---
> >  drivers/pci/quirks.c |   22 ++++++++++++++++++++++
> >  1 file changed, 22 insertions(+)
> 
> I forgot to link the bz in this one, if this somehow becomes the final
> version, please add:
> 
> Link: https://bugzilla.redhat.com/show_bug.cgi?id=159265

Corrected link to: https://bugzilla.redhat.com/show_bug.cgi?id=1592654