linux-kernel - Re: [PATCH v3 3/3] scsi: ufs: Print host regs in IRQ handler when AH8 error happens

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Date:   Tue, 24 Nov 2020 20:17:59 -0800
From:   nguyenb@...eaurora.org
To:     Can Guo <cang@...eaurora.org>
Cc:     asutoshd@...eaurora.org, hongwus@...eaurora.org,
        ziqichen@...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>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Bean Huo <beanhuo@...ron.com>,
        Bart Van Assche <bvanassche@....org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] scsi: ufs: Print host regs in IRQ handler when AH8
 error happens

On 2020-11-16 23:04, Can Guo wrote:
> When AH8 error happens, all the regs and states are dumped in err 
> handler.
> Sometime we need to look into host regs right after AH8 error happens,
> which is before leaving the IRQ handler.
> 
> Signed-off-by: Can Guo <cang@...eaurora.org>
> ---
>  drivers/scsi/ufs/ufshcd.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index cd7394e..a7857f6 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -6057,7 +6057,8 @@ static irqreturn_t ufshcd_check_errors(struct
> ufs_hba *hba)
>  		hba->saved_uic_err |= hba->uic_error;
> 
>  		/* dump controller state before resetting */
> -		if ((hba->saved_err & (INT_FATAL_ERRORS)) ||
> +		if ((hba->saved_err &
> +		     (INT_FATAL_ERRORS | UFSHCD_UIC_HIBERN8_MASK)) ||
>  		    (hba->saved_uic_err &&
>  		     (hba->saved_uic_err != UFSHCD_UIC_PA_GENERIC_ERROR))) {
>  			dev_err(hba->dev, "%s: saved_err 0x%x saved_uic_err 0x%x\n",

Reviewed-by: Bao D. Nguyen <nguyenb@...eaurora.org>