linux-kernel - [PATCH v2] usb: typec: qcom: check regulator enable status before disabling it

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Message-Id: <20230824-qcom-tcpc-v2-1-3dd8c3424564@quicinc.com>
Date:   Thu, 24 Aug 2023 10:32:03 +0800
From:   Hui Liu via B4 Relay <devnull+quic_huliu.quicinc.com@...nel.org>
To:     Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_fenglinw@...cinc.com,
        subbaram@...cinc.com, Hui Liu <quic_huliu@...cinc.com>
Subject: [PATCH v2] usb: typec: qcom: check regulator enable status before
 disabling it

From: Hui Liu <quic_huliu@...cinc.com>

Check regulator enable status before disabling it to avoid
unbalanced regulator disable warnings.

Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Fixes: a4422ff22142 ("usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Signed-off-by: Hui Liu <quic_huliu@...cinc.com>
---
Changes in v2:
- Add Fixes tag
- Link to v1: https://lore.kernel.org/r/20230823-qcom-tcpc-v1-1-fa81a09ca056@quicinc.com
---
 drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c
index bb0b8479d80f..ca616b17b5b6 100644
--- a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c
+++ b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c
@@ -422,7 +422,8 @@ static int qcom_pmic_typec_pdphy_disable(struct pmic_typec_pdphy *pmic_typec_pdp
 	ret = regmap_write(pmic_typec_pdphy->regmap,
 			   pmic_typec_pdphy->base + USB_PDPHY_EN_CONTROL_REG, 0);
 
-	regulator_disable(pmic_typec_pdphy->vdd_pdphy);
+	if (regulator_is_enabled(pmic_typec_pdphy->vdd_pdphy))
+		regulator_disable(pmic_typec_pdphy->vdd_pdphy);
 
 	return ret;
 }

---
base-commit: bbb9e06d2c6435af9c62074ad7048910eeb2e7bc
change-id: 20230822-qcom-tcpc-d41954ac65fa

Best regards,
-- 
Hui Liu <quic_huliu@...cinc.com>