PM / devfreq: tegra30: Add error message for devm_devfreq_add_device()

It's difficult to notice that driver failed to probe by looking at KMSG
when devm_devfreq_add_device() fails. Add explicit error message for this
case.

Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index 65ecf17..585a95f 100644 (file)
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -922,8 +922,10 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
 
        devfreq = devm_devfreq_add_device(&pdev->dev, &tegra_devfreq_profile,
                                          "tegra_actmon", NULL);
-       if (IS_ERR(devfreq))
+       if (IS_ERR(devfreq)) {
+               dev_err(&pdev->dev, "Failed to add device: %pe\n", devfreq);
                return PTR_ERR(devfreq);
+       }
 
        return 0;
 }