linux-kernel - [PATCH v1 04/11] cpufreq: tegra20: Release clocks properly

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Date:   Thu, 17 May 2018 21:00:49 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>
Cc:     linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Peter Geis <pgwipeout@...il.com>
Subject: [PATCH v1 04/11] cpufreq: tegra20: Release clocks properly

Properly put requested clocks in the module init/exit code.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/cpufreq/tegra20-cpufreq.c | 31 ++++++++++++++++++++++++++-----
 1 file changed, 26 insertions(+), 5 deletions(-)

diff --git a/drivers/cpufreq/tegra20-cpufreq.c b/drivers/cpufreq/tegra20-cpufreq.c
index 693f9067ba8a..69f033d297e1 100644
--- a/drivers/cpufreq/tegra20-cpufreq.c
+++ b/drivers/cpufreq/tegra20-cpufreq.c
@@ -165,24 +165,45 @@ static struct cpufreq_driver tegra_cpufreq_driver = {
 
 static int __init tegra_cpufreq_init(void)
 {
+	int err;
+
 	cpu_clk = clk_get_sys(NULL, "cclk");
 	if (IS_ERR(cpu_clk))
 		return PTR_ERR(cpu_clk);
 
 	pll_x_clk = clk_get_sys(NULL, "pll_x");
-	if (IS_ERR(pll_x_clk))
-		return PTR_ERR(pll_x_clk);
+	if (IS_ERR(pll_x_clk)) {
+		err = PTR_ERR(pll_x_clk);
+		goto put_cpu;
+	}
 
 	pll_p_clk = clk_get_sys(NULL, "pll_p");
-	if (IS_ERR(pll_p_clk))
-		return PTR_ERR(pll_p_clk);
+	if (IS_ERR(pll_p_clk)) {
+		err = PTR_ERR(pll_p_clk);
+		goto put_pll_x;
+	}
+
+	err = cpufreq_register_driver(&tegra_cpufreq_driver);
+	if (err)
+		goto put_pll_p;
+
+	return 0;
+
+put_pll_p:
+	clk_put(pll_p_clk);
+put_pll_x:
+	clk_put(pll_x_clk);
+put_cpu:
+	clk_put(cpu_clk);
 
-	return cpufreq_register_driver(&tegra_cpufreq_driver);
+	return err;
 }
 
 static void __exit tegra_cpufreq_exit(void)
 {
 	cpufreq_unregister_driver(&tegra_cpufreq_driver);
+	clk_put(pll_p_clk);
+	clk_put(pll_x_clk);
 	clk_put(cpu_clk);
 }
 
-- 
2.17.0