linux-kernel - Re: [PATCH v2] PCI: cadence: Clear FLR in device capabilities register

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Message-ID: <20220512190626.GA862290@bhelgaas>
Date:   Thu, 12 May 2022 14:06:26 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     Parshuram Raju Thombare <pthombar@...ence.com>,
        tjoseph@...ence.com, bhelgaas@...gle.com, robh@...nel.org,
        kishon@...com, kw@...ux.com, mparab@...ence.com,
        linux-pci@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] PCI: cadence: Clear FLR in device capabilities
 register

On Wed, May 11, 2022 at 05:02:35PM +0100, Lorenzo Pieralisi wrote:
> On Mon, 15 Nov 2021 23:39:16 -0800, Parshuram Raju Thombare wrote:
> > From: Parshuram Thombare <pthombar@...ence.com>
> > 
> > Clear FLR (Function Level Reset) from device capabilities
> > registers for all physical functions.
> > 
> > During FLR, the Margining Lane Status and Margining Lane Control
> > registers should not be reset, as per PCIe specification.
> > However, the controller incorrectly resets these registers upon FLR.
> > This causes PCISIG compliance FLR test to fail. Hence preventing
> > all functions from advertising FLR support if flag quirk_disable_flr
> > is set.
> > 
> > [...]
> 
> Applied to pci/cadence, thanks!
> 
> [1/1] PCI: cadence: Clear FLR in device capabilities register
>       https://git.kernel.org/lpieralisi/pci/c/d3dbd4d862

Obviously you've already seen the kbuild report:
  https://lore.kernel.org/r/202205120700.X76G7aC2-lkp@intel.com

but it looks like most of this patch got lost somehow :)  Happy to fix
it up for you if you want!

Bjorn