cpufreq: kirkwood-cpufreq:- Handle return value of clk_prepare_enable()

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c
index 1b9bcd7..c2dd43f 100644 (file)
--- a/drivers/cpufreq/kirkwood-cpufreq.c
+++ b/drivers/cpufreq/kirkwood-cpufreq.c
@@ -127,7 +127,12 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev)
                return PTR_ERR(priv.cpu_clk);
        }
 
-       clk_prepare_enable(priv.cpu_clk);
+       err = clk_prepare_enable(priv.cpu_clk);
+       if (err) {
+               dev_err(priv.dev, "Unable to prepare cpuclk\n");
+               return err;
+       }
+
        kirkwood_freq_table[0].frequency = clk_get_rate(priv.cpu_clk) / 1000;
 
        priv.ddr_clk = of_clk_get_by_name(np, "ddrclk");
@@ -137,7 +142,11 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev)
                goto out_cpu;
        }
 
-       clk_prepare_enable(priv.ddr_clk);
+       err = clk_prepare_enable(priv.ddr_clk);
+       if (err) {
+               dev_err(priv.dev, "Unable to prepare ddrclk\n");
+               goto out_cpu;
+       }
        kirkwood_freq_table[1].frequency = clk_get_rate(priv.ddr_clk) / 1000;
 
        priv.powersave_clk = of_clk_get_by_name(np, "powersave");
@@ -146,7 +155,11 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev)
                err = PTR_ERR(priv.powersave_clk);
                goto out_ddr;
        }
-       clk_prepare_enable(priv.powersave_clk);
+       err = clk_prepare_enable(priv.powersave_clk);
+       if (err) {
+               dev_err(priv.dev, "Unable to prepare powersave clk\n");
+               goto out_ddr;
+       }
 
        of_node_put(np);
        np = NULL;