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

[Nitin Rawat (QUIC)]

Thanks keith for review.
Yes moved the condition check outside vendor/device check in Patchset 2.

-----Original Message-----
From: Keith Busch <kbusch at kernel.org> 
Sent: Thursday, February 10, 2022 8:31 PM
To: Nitin Rawat (QUIC) <quic_nitirawa at quicinc.com>
Cc: Jens Axboe <axboe at fb.com>; Sagi Grimberg <sagi at grimberg.me>; linux-nvme at lists.infradead.org; linux-kernel at vger.kernel.org; Sajida Bhanu (Temp) (QUIC) <quic_c_sbhanu at quicinc.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 at quicinc.com>
> Signed-off-by: Shaik Sajida Bhanu <quic_c_sbhanu at quicinc.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.