linux-kernel - [PATCH] regulator: qcom_rpm: Don't update vreg->uV/mV if rpm_reg

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Date:	Sat, 24 Jan 2015 12:01:12 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] regulator: qcom_rpm: Don't update vreg->uV/mV if
 rpm_reg_write fails

Ensure get_voltage return correct voltage if set_voltage fails.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/regulator/qcom_rpm-regulator.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/qcom_rpm-regulator.c b/drivers/regulator/qcom_rpm-regulator.c
index edd0a17..f48b3de 100644
--- a/drivers/regulator/qcom_rpm-regulator.c
+++ b/drivers/regulator/qcom_rpm-regulator.c
@@ -228,9 +228,11 @@ static int rpm_reg_set_mV_sel(struct regulator_dev *rdev,
 		return uV;
 
 	mutex_lock(&vreg->lock);
-	vreg->uV = uV;
 	if (vreg->is_enabled)
-		ret = rpm_reg_write(vreg, req, vreg->uV / 1000);
+		ret = rpm_reg_write(vreg, req, uV / 1000);
+
+	if (!ret)
+		vreg->uV = uV;
 	mutex_unlock(&vreg->lock);
 
 	return ret;
@@ -253,9 +255,11 @@ static int rpm_reg_set_uV_sel(struct regulator_dev *rdev,
 		return uV;
 
 	mutex_lock(&vreg->lock);
-	vreg->uV = uV;
 	if (vreg->is_enabled)
-		ret = rpm_reg_write(vreg, req, vreg->uV);
+		ret = rpm_reg_write(vreg, req, uV);
+
+	if (!ret)
+		vreg->uV = uV;
 	mutex_unlock(&vreg->lock);
 
 	return ret;
-- 
1.9.1



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