From: Anson Huang <anson.huang@nxp.com>
Date: Mon, 5 Nov 2018 00:59:28 +0000 (+0000)
Subject: cpufreq: imx6q: add return value check for voltage scale
X-Git-Tag: v4.19.6~33
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=121f89dd7024bd90e5b1ee25258345a45075a849;p=thirdparty%2Fkernel%2Fstable.git

cpufreq: imx6q: add return value check for voltage scale

[ Upstream commit 6ef28a04d1ccf718eee069b72132ce4aa1e52ab9 ]

Add return value check for voltage scale when ARM clock
rate change fail.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index b2ff423ad7f82..f4880a4f865bc 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -159,8 +159,13 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
 	/* Ensure the arm clock divider is what we expect */
 	ret = clk_set_rate(clks[ARM].clk, new_freq * 1000);
 	if (ret) {
+		int ret1;
+
 		dev_err(cpu_dev, "failed to set clock rate: %d\n", ret);
-		regulator_set_voltage_tol(arm_reg, volt_old, 0);
+		ret1 = regulator_set_voltage_tol(arm_reg, volt_old, 0);
+		if (ret1)
+			dev_warn(cpu_dev,
+				 "failed to restore vddarm voltage: %d\n", ret1);
 		return ret;
 	}