diff mbox series

[v3,1/2] ufs: core: fix the issue of ICU failure

Message ID 20240909082100.24019-2-peter.wang@mediatek.com (mailing list archive)
State New
Headers show
Series fix abort defect | expand

Commit Message

Peter Wang (王信友) Sept. 9, 2024, 8:20 a.m. UTC 
From: Peter Wang <peter.wang@mediatek.com>

When setting the ICU bit without using read-modify-write,
SQRTCy will restart SQ again and receive an RTC return
error code 2 (Failure - SQ not stopped).

Additionally, the error log has been modified so that
this type of error can be observed.

Fixes: ab248643d3d6 ("scsi: ufs: core: Add error handling for MCQ mode")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
---
 drivers/ufs/core/ufs-mcq.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

Comments

Bao D. Nguyen Sept. 9, 2024, 2:51 p.m. UTC | #1 
On 9/9/2024 1:20 AM, peter.wang@mediatek.com wrote:
> From: Peter Wang <peter.wang@mediatek.com>
> 
> When setting the ICU bit without using read-modify-write,
> SQRTCy will restart SQ again and receive an RTC return
> error code 2 (Failure - SQ not stopped).
> 
> Additionally, the error log has been modified so that
> this type of error can be observed.
> 
> Fixes: ab248643d3d6 ("scsi: ufs: core: Add error handling for MCQ mode")
> Cc: stable@vger.kernel.org
> Signed-off-by: Peter Wang <peter.wang@mediatek.com>
> ---

Reviewed-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
Bart Van Assche Sept. 9, 2024, 4:24 p.m. UTC | #2 
On 9/9/24 1:20 AM, peter.wang@mediatek.com wrote:
> diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
> index 5891cdacd0b3..3903947dbed1 100644
> --- a/drivers/ufs/core/ufs-mcq.c
> +++ b/drivers/ufs/core/ufs-mcq.c
> @@ -539,7 +539,7 @@ int ufshcd_mcq_sq_cleanup(struct ufs_hba *hba, int task_tag)
>   	struct scsi_cmnd *cmd = lrbp->cmd;
>   	struct ufs_hw_queue *hwq;
>   	void __iomem *reg, *opr_sqd_base;
> -	u32 nexus, id, val;
> +	u32 nexus, id, val, rtc;
>   	int err;
>   
>   	if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_RTC)
> @@ -569,17 +569,18 @@ int ufshcd_mcq_sq_cleanup(struct ufs_hba *hba, int task_tag)
>   	opr_sqd_base = mcq_opr_base(hba, OPR_SQD, id);
>   	writel(nexus, opr_sqd_base + REG_SQCTI);
>   
> -	/* SQRTCy.ICU = 1 */
> -	writel(SQ_ICU, opr_sqd_base + REG_SQRTC);
> +	/* Initiate Cleanup */
> +	writel(readl(opr_sqd_base + REG_SQRTC) | SQ_ICU,
> +		opr_sqd_base + REG_SQRTC);
>   
>   	/* Poll SQRTSy.CUS = 1. Return result from SQRTSy.RTC */
>   	reg = opr_sqd_base + REG_SQRTS;
>   	err = read_poll_timeout(readl, val, val & SQ_CUS, 20,
>   				MCQ_POLL_US, false, reg);
> -	if (err)
> -		dev_err(hba->dev, "%s: failed. hwq=%d, tag=%d err=%ld\n",
> -			__func__, id, task_tag,
> -			FIELD_GET(SQ_ICU_ERR_CODE_MASK, readl(reg)));
> +	rtc = FIELD_GET(SQ_ICU_ERR_CODE_MASK, readl(reg));
> +	if (err || rtc)
> +		dev_err(hba->dev, "%s: failed. hwq=%d, tag=%d err=%d RTC=%d\n",
> +			__func__, id, task_tag, err, rtc);
>   
>   	if (ufshcd_mcq_sq_start(hba, hwq))
>   		err = -ETIMEDOUT;

Reviewed-by: Bart Van Assche <bvanassche@acm.org>
diff mbox series

Patch

diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
index 5891cdacd0b3..3903947dbed1 100644
--- a/drivers/ufs/core/ufs-mcq.c
+++ b/drivers/ufs/core/ufs-mcq.c
@@ -539,7 +539,7 @@  int ufshcd_mcq_sq_cleanup(struct ufs_hba *hba, int task_tag)
 	struct scsi_cmnd *cmd = lrbp->cmd;
 	struct ufs_hw_queue *hwq;
 	void __iomem *reg, *opr_sqd_base;
-	u32 nexus, id, val;
+	u32 nexus, id, val, rtc;
 	int err;
 
 	if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_RTC)
@@ -569,17 +569,18 @@  int ufshcd_mcq_sq_cleanup(struct ufs_hba *hba, int task_tag)
 	opr_sqd_base = mcq_opr_base(hba, OPR_SQD, id);
 	writel(nexus, opr_sqd_base + REG_SQCTI);
 
-	/* SQRTCy.ICU = 1 */
-	writel(SQ_ICU, opr_sqd_base + REG_SQRTC);
+	/* Initiate Cleanup */
+	writel(readl(opr_sqd_base + REG_SQRTC) | SQ_ICU,
+		opr_sqd_base + REG_SQRTC);
 
 	/* Poll SQRTSy.CUS = 1. Return result from SQRTSy.RTC */
 	reg = opr_sqd_base + REG_SQRTS;
 	err = read_poll_timeout(readl, val, val & SQ_CUS, 20,
 				MCQ_POLL_US, false, reg);
-	if (err)
-		dev_err(hba->dev, "%s: failed. hwq=%d, tag=%d err=%ld\n",
-			__func__, id, task_tag,
-			FIELD_GET(SQ_ICU_ERR_CODE_MASK, readl(reg)));
+	rtc = FIELD_GET(SQ_ICU_ERR_CODE_MASK, readl(reg));
+	if (err || rtc)
+		dev_err(hba->dev, "%s: failed. hwq=%d, tag=%d err=%d RTC=%d\n",
+			__func__, id, task_tag, err, rtc);
 
 	if (ufshcd_mcq_sq_start(hba, hwq))
 		err = -ETIMEDOUT;