linux-kernel - [PATCH] scsi: ufs: qcom: move ufs_qcom_host_reset() to ufs_qcom_device

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Message-Id: <1698145815-17396-1-git-send-email-quic_ziqichen@quicinc.com>
Date:   Tue, 24 Oct 2023 19:10:15 +0800
From:   Ziqi Chen <quic_ziqichen@...cinc.com>
To:     quic_asutoshd@...cinc.com, quic_cang@...cinc.com,
        bvanassche@....org, mani@...nel.org, beanhuo@...ron.com,
        avri.altman@....com, junwoo80.lee@...sung.com,
        martin.petersen@...cle.com, quic_ziqichen@...cinc.com,
        quic_nguyenb@...cinc.com, quic_nitirawa@...cinc.com,
        quic_rampraka@...cinc.com
Cc:     linux-scsi@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        linux-arm-msm@...r.kernel.org (open list:ARM/QUALCOMM SUPPORT),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] scsi: ufs: qcom: move ufs_qcom_host_reset() to ufs_qcom_device_reset()

During PISI test, we found the issue that host Tx still bursting after
H/W reset. Move ufs_qcom_host_reset() to ufs_qcom_device_reset() and
reset host before device reset to stop tx burst.

Signed-off-by: Ziqi Chen <quic_ziqichen@...cinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 96cb8b5..43163d3 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -445,12 +445,6 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
 	struct phy *phy = host->generic_phy;
 	int ret;
 
-	/* Reset UFS Host Controller and PHY */
-	ret = ufs_qcom_host_reset(hba);
-	if (ret)
-		dev_warn(hba->dev, "%s: host reset returned %d\n",
-				  __func__, ret);
-
 	/* phy initialization - calibrate the phy */
 	ret = phy_init(phy);
 	if (ret) {
@@ -1709,6 +1703,13 @@ static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
 static int ufs_qcom_device_reset(struct ufs_hba *hba)
 {
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+	int ret = 0;
+
+	/* Reset UFS Host Controller and PHY */
+	ret = ufs_qcom_host_reset(hba);
+	if (ret)
+		dev_warn(hba->dev, "%s: host reset returned %d\n",
+				  __func__, ret);
 
 	/* reset gpio is optional */
 	if (!host->device_reset)
-- 
2.7.4