linux-kernel - Re: [PATCH v2 2/2] scsi: ufs-qcom: Apply QUIRK_HOST

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Date:   Tue, 25 Feb 2020 08:58:22 -0800
From:   "Asutosh Das (asd)" <asutoshd@...eaurora.org>
To:     Can Guo <cang@...eaurora.org>, nguyenb@...eaurora.org,
        hongwus@...eaurora.org, rnayak@...eaurora.org,
        linux-scsi@...r.kernel.org, kernel-team@...roid.com,
        saravanak@...gle.com, salyzyn@...gle.com
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Alexios Zavras <alexios.zavras@...el.com>,
        Bart Van Assche <bvanassche@....org>,
        Evan Green <evgreen@...omium.org>,
        Bean Huo <beanhuo@...ron.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-arm-msm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] scsi: ufs-qcom: Apply QUIRK_HOST_TACTIVATE for WDC
 UFS devices

On 2/23/2020 8:09 PM, Can Guo wrote:
> Western Digital UFS devices require host's PA_TACTIVATE to be lower than
> device's PA_TACTIVATE, otherwise it may get stuck during hibern8 sequence.
> 
> Signed-off-by: Can Guo <cang@...eaurora.org>
> ---

Reviewed-by: Asutosh Das <asutoshd@...eaurora.org>

>   drivers/scsi/ufs/ufs-qcom.c   | 3 +++
>   drivers/scsi/ufs/ufs_quirks.h | 1 +
>   2 files changed, 4 insertions(+)
> 
> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
> index c69c29a1c..4caa57f 100644
> --- a/drivers/scsi/ufs/ufs-qcom.c
> +++ b/drivers/scsi/ufs/ufs-qcom.c
> @@ -956,6 +956,9 @@ static int ufs_qcom_apply_dev_quirks(struct ufs_hba *hba)
>   	if (hba->dev_quirks & UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME)
>   		err = ufs_qcom_quirk_host_pa_saveconfigtime(hba);
>   
> +	if (hba->dev_info.wmanufacturerid == UFS_VENDOR_WDC)
> +		hba->dev_quirks |= UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE;
> +
>   	return err;
>   }
>   
> diff --git a/drivers/scsi/ufs/ufs_quirks.h b/drivers/scsi/ufs/ufs_quirks.h
> index d0ab147..df7a1e6 100644
> --- a/drivers/scsi/ufs/ufs_quirks.h
> +++ b/drivers/scsi/ufs/ufs_quirks.h
> @@ -15,6 +15,7 @@
>   #define UFS_VENDOR_TOSHIBA     0x198
>   #define UFS_VENDOR_SAMSUNG     0x1CE
>   #define UFS_VENDOR_SKHYNIX     0x1AD
> +#define UFS_VENDOR_WDC         0x145
>   
>   /**
>    * ufs_dev_fix - ufs device quirk info
> 


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