4.9-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 3.14.7 / cpufreq-cpu0-drop-wrong-devm-usage.patch

From e3beb0ac521d50d158a9d253373eae8421ac3998 Mon Sep 17 00:00:00 2001
From: Lucas Stach <l.stach@pengutronix.de>
Date: Fri, 16 May 2014 12:20:42 +0200
Subject: cpufreq: cpu0: drop wrong devm usage

From: Lucas Stach <l.stach@pengutronix.de>

commit e3beb0ac521d50d158a9d253373eae8421ac3998 upstream.

This driver is using devres managed calls incorrectly, giving the cpu0
device as first parameter instead of the cpufreq platform device.
This results in resources not being freed if the cpufreq platform device
is unbound, for example if probing has to be deferred for a missing
regulator.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/cpufreq/cpufreq-cpu0.c |   16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

--- a/drivers/cpufreq/cpufreq-cpu0.c
+++ b/drivers/cpufreq/cpufreq-cpu0.c
@@ -131,7 +131,7 @@ static int cpu0_cpufreq_probe(struct pla
 		return -ENOENT;
 	}
 
-	cpu_reg = devm_regulator_get_optional(cpu_dev, "cpu0");
+	cpu_reg = regulator_get_optional(cpu_dev, "cpu0");
 	if (IS_ERR(cpu_reg)) {
 		/*
 		 * If cpu0 regulator supply node is present, but regulator is
@@ -146,23 +146,23 @@ static int cpu0_cpufreq_probe(struct pla
 			PTR_ERR(cpu_reg));
 	}
 
-	cpu_clk = devm_clk_get(cpu_dev, NULL);
+	cpu_clk = clk_get(cpu_dev, NULL);
 	if (IS_ERR(cpu_clk)) {
 		ret = PTR_ERR(cpu_clk);
 		pr_err("failed to get cpu0 clock: %d\n", ret);
-		goto out_put_node;
+		goto out_put_reg;
 	}
 
 	ret = of_init_opp_table(cpu_dev);
 	if (ret) {
 		pr_err("failed to init OPP table: %d\n", ret);
-		goto out_put_node;
+		goto out_put_clk;
 	}
 
 	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
 	if (ret) {
 		pr_err("failed to init cpufreq table: %d\n", ret);
-		goto out_put_node;
+		goto out_put_clk;
 	}
 
 	of_property_read_u32(np, "voltage-tolerance", &voltage_tolerance);
@@ -217,6 +217,12 @@ static int cpu0_cpufreq_probe(struct pla
 
 out_free_table:
 	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
+out_put_clk:
+	if (!IS_ERR(cpu_clk))
+		clk_put(cpu_clk);
+out_put_reg:
+	if (!IS_ERR(cpu_reg))
+		regulator_put(cpu_reg);
 out_put_node:
 	of_node_put(np);
 	return ret;