linux-kernel - [PATCH 2/2] phy: qcom-qmp: fix pipe-clock imbalance on power-on failure

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Date:   Wed, 20 Apr 2022 17:23:31 +0200
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>,
        Evan Green <evgreen@...omium.org>
Subject: [PATCH 2/2] phy: qcom-qmp: fix pipe-clock imbalance on power-on failure

Make sure to disable the pipe clock also if ufs-reset deassertion fails
during power on.

Note that the ufs-reset is asserted in qcom_qmp_phy_com_exit().

Fixes: c9b589791fc1 ("phy: qcom: Utilize UFS reset controller")
Cc: Evan Green <evgreen@...omium.org>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index 8c2300bfe489..7d2d1ab061f7 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -5375,14 +5375,14 @@ static int qcom_qmp_phy_power_on(struct phy *phy)
 		if (ret) {
 			dev_err(qmp->dev, "lane%d reset deassert failed\n",
 				qphy->index);
-			goto err_lane_rst;
+			return ret;
 		}
 	}
 
 	ret = clk_prepare_enable(qphy->pipe_clk);
 	if (ret) {
 		dev_err(qmp->dev, "pipe_clk enable failed err=%d\n", ret);
-		goto err_clk_enable;
+		goto err_reset_lane;
 	}
 
 	/* Tx, Rx, and PCS configurations */
@@ -5433,7 +5433,7 @@ static int qcom_qmp_phy_power_on(struct phy *phy)
 
 	ret = reset_control_deassert(qmp->ufs_reset);
 	if (ret)
-		goto err_lane_rst;
+		goto err_disable_pipe_clk;
 
 	qcom_qmp_phy_configure(pcs_misc, cfg->regs, cfg->pcs_misc_tbl,
 			       cfg->pcs_misc_tbl_num);
@@ -5472,17 +5472,17 @@ static int qcom_qmp_phy_power_on(struct phy *phy)
 					 PHY_INIT_COMPLETE_TIMEOUT);
 		if (ret) {
 			dev_err(qmp->dev, "phy initialization timed-out\n");
-			goto err_pcs_ready;
+			goto err_disable_pipe_clk;
 		}
 	}
 	return 0;
 
-err_pcs_ready:
+err_disable_pipe_clk:
 	clk_disable_unprepare(qphy->pipe_clk);
-err_clk_enable:
+err_reset_lane:
 	if (cfg->has_lane_rst)
 		reset_control_assert(qphy->lane_rst);
-err_lane_rst:
+
 	return ret;
 }
 
-- 
2.35.1