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Message-Id: <1480994742-19737-1-git-send-email-subhashj@codeaurora.org>
Date: Mon, 5 Dec 2016 19:25:42 -0800
From: Subhash Jadavani <subhashj@...eaurora.org>
To: vinholikatti@...il.com, jejb@...ux.vnet.ibm.com,
martin.petersen@...cle.com
Cc: linux-scsi@...r.kernel.org,
Subhash Jadavani <subhashj@...eaurora.org>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v1 4/4] scsi: ufs-qcom: fix bug with read/modify write of UFS_CFG1
ufs_qcom_print_hw_debug_reg_all() function is having a bug
where it might incorrectly modify undesired bits in UFS_CFG1 register,
this change fixes it.
Reviewed-by: Venkat Gopalakrishnan <venkatg@...eaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@...eaurora.org>
---
drivers/scsi/ufs/ufs-qcom.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 2943a68..abe6173 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -1470,7 +1470,8 @@ static void ufs_qcom_print_hw_debug_reg_all(struct ufs_hba *hba,
reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_PRDT_RAM);
print_fn(hba, reg, 64, "UFS_UFS_DBG_RD_PRDT_RAM ", priv);
- ufshcd_writel(hba, (reg & ~UFS_BIT(17)), REG_UFS_CFG1);
+ /* clear bit 17 - UTP_DBG_RAMS_EN */
+ ufshcd_rmwl(hba, UFS_BIT(17), 0, REG_UFS_CFG1);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_UAWM);
print_fn(hba, reg, 4, "UFS_DBG_RD_REG_UAWM ", priv);
--
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