PM / devfreq: exynos-ppmu: 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>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c
index 9b73509..8f6537a 100644 (file)
--- a/drivers/devfreq/event/exynos-ppmu.c
+++ b/drivers/devfreq/event/exynos-ppmu.c
@@ -648,7 +648,11 @@ static int exynos_ppmu_probe(struct platform_device *pdev)
                        dev_name(&pdev->dev), desc[i].name);
        }
 
-       clk_prepare_enable(info->ppmu.clk);
+       ret = clk_prepare_enable(info->ppmu.clk);
+       if (ret) {
+               dev_err(&pdev->dev, "failed to prepare ppmu clock\n");
+               return ret;
+       }
 
        return 0;
 }