linux-kernel - Re: [PATCH v1] nvme/pci: Add quick suspend quirk for Toshiba drive.

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Message-ID: <20220210150114.GB1617879@dhcp-10-100-145-180.wdc.com>
Date:   Thu, 10 Feb 2022 07:01:14 -0800
From:   Keith Busch <kbusch@...nel.org>
To:     Nitin Rawat <quic_nitirawa@...cinc.com>
Cc:     Jens Axboe <axboe@...com>, Sagi Grimberg <sagi@...mberg.me>,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Shaik Sajida Bhanu <quic_c_sbhanu@...cinc.com>
Subject: Re: [PATCH v1] nvme/pci: Add quick suspend quirk for Toshiba drive.

On Thu, Feb 10, 2022 at 05:51:16PM +0530, Nitin Rawat wrote:
> The Toshiba KBG40ZPZ256G SSD is having resume issues on SC7280 platform.
> Hence enabling quick suspend quirks for Toshiba KBG40ZPZ256G on sc7280
> platform so that nvme device is taken through shutdown path
> during resume.
> 
> No issue is seen after enabling this quirks.
> 
> Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
> Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu@...cinc.com>
> ---
>  drivers/nvme/host/pci.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
> index 6a99ed6..04c5954 100644
> --- a/drivers/nvme/host/pci.c
> +++ b/drivers/nvme/host/pci.c
> @@ -3032,6 +3032,15 @@ static unsigned long check_vendor_combination_bug(struct pci_dev *pdev)
>  		if ((dmi_match(DMI_BOARD_VENDOR, "LENOVO")) &&
>  		     dmi_match(DMI_BOARD_NAME, "LNVNB161216"))
>  			return NVME_QUIRK_SIMPLE_SUSPEND;
> +
> +		/*
> +		 * Toshiba KBG40ZPZ256G on Sc7280 platform is having NVMe
> +		 * Resume issue. Appending quick suspend quirks for sc7280
> +		 * platforms so that full NVMe device shutdown path is
> +		 * executed during resume.
> +		 */
> +		if (of_machine_is_compatible("qcom,sc7280"))
> +			return NVME_QUIRK_SIMPLE_SUSPEND;

Shouldn't this check be moved outside the vendor/device check? It
doesn't seem like this behavior for this platform is specific to any
particular controller, right?

Otherwise, looks fine.