linux-kernel - Re: [PATCH] PCI: Delay after FLR of Intel DC P4510 NVMe

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Message-ID: <20210409164612.GA2037722@bjorn-Precision-5520>
Date:   Fri, 9 Apr 2021 11:46:12 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Raphael Norwitz <raphael.norwitz@...anix.com>
Cc:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "ameynarkhede03@...il.com" <ameynarkhede03@...il.com>,
        Alay Shah <alay.shah@...anix.com>,
        Suresh Gumpula <suresh.gumpula@...anix.com>
Subject: Re: [PATCH] PCI: Delay after FLR of Intel DC P4510 NVMe

On Thu, Apr 08, 2021 at 07:05:27PM +0000, Raphael Norwitz wrote:
> Like the Intel DC P3700 NVMe, the Intel P4510 NVMe exhibits a timeout
> failure when the driver tries to interact with the device to soon after
> an FLR. The same reset quirk the P3700 uses also resolves the failure
> for the P4510, so this change introduces the same reset quirk for the
> P4510.
> 
> Reviewed-by: Alex Williamson <alex.williamson@...hat.com>
> Signed-off-by: Alay Shah <alay.shah@...anix.com>
> Signed-off-by: Suresh Gumpula <suresh.gumpula@...anix.com>
> Signed-off-by: Raphael Norwitz <raphael.norwitz@...anix.com>

Applied to pci/virtualization for v5.13, thanks!

> ---
>  drivers/pci/quirks.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 653660e3ba9e..5a8c059b848d 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -3922,6 +3922,7 @@ static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
>  		reset_ivb_igd },
>  	{ PCI_VENDOR_ID_SAMSUNG, 0xa804, nvme_disable_and_flr },
>  	{ PCI_VENDOR_ID_INTEL, 0x0953, delay_250ms_after_flr },
> +	{ PCI_VENDOR_ID_INTEL, 0x0a54, delay_250ms_after_flr },
>  	{ PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
>  		reset_chelsio_generic_dev },
>  	{ 0 }
> -- 
> 2.20.1