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scsi: ufs: core: Fix the issue of ICU failure

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commit bf0c6cc73f7f91ec70307f7c72343f6cb7d65d01 upstream.

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: ab248643d3 ("scsi: ufs: core: Add error handling for MCQ mode")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20241001091917.6917-2-peter.wang@mediatek.com
Reviewed-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Wang
2024-10-01 17:19:16 +08:00
committed by Greg Kroah-Hartman
parent 7bd9af2542
commit 8e6ca01b3b
1 changed files with 8 additions and 7 deletions
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15
drivers/ufs/core/ufs-mcq.c
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@@ -498,7 +498,7 @@ 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)
@@ -528,17 +528,18 @@ 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;