linux-kernel - Re: [PATCH v5 1/7] scsi: ufs: Add device reset in link recovery path

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Date:   Fri, 15 Nov 2019 14:25:14 +0800
From:   Stanley Chu <stanley.chu@...iatek.com>
To:     Can Guo <cang@...eaurora.org>
CC:     <asutoshd@...eaurora.org>, <nguyenb@...eaurora.org>,
        <rnayak@...eaurora.org>, <linux-scsi@...r.kernel.org>,
        <kernel-team@...roid.com>, <saravanak@...gle.com>,
        <salyzyn@...gle.com>, Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Pedro Sousa <pedrom.sousa@...opsys.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Bean Huo <beanhuo@...ron.com>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Venkat Gopalakrishnan <venkatg@...eaurora.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 1/7] scsi: ufs: Add device reset in link recovery path

Hi Can,

On Thu, 2019-11-14 at 22:09 -0800, Can Guo wrote:
> In order to recover from hibern8 exit failure, perform a reset in
> link recovery path before issuing link start-up.
> 
> Signed-off-by: Can Guo <cang@...eaurora.org>
> Reviewed-by: Bean Huo <beanhuo@...ron.com>
> ---
>  drivers/scsi/ufs/ufshcd.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index c28c144..525f8e6 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -3859,6 +3859,9 @@ static int ufshcd_link_recovery(struct ufs_hba *hba)
>  	ufshcd_set_eh_in_progress(hba);
>  	spin_unlock_irqrestore(hba->host->host_lock, flags);
>  
> +	/* Reset the attached device */
> +	ufshcd_vops_device_reset(hba);
> +
>  	ret = ufshcd_host_reset_and_restore(hba);
>  
>  	spin_lock_irqsave(hba->host->host_lock, flags);

Reviewed-by: Stanley Chu <stanley.chu@...iatek.com>