PM / devfreq: exynos-bus: Add error log when fail to get devfreq-event

Adding an error log makes it easier to trace the function's error path.
Because the error code may be rewritten on return, print error code here.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index 1259a0da7db71e5f2dd1a008da29ad3ec77da52c..8fa8eb5413732fa7bab5df8e344b4a76d8597d3d 100644 (file)
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c
@@ -126,6 +126,7 @@ static int exynos_bus_get_dev_status(struct device *dev,
 
        ret = exynos_bus_get_event(bus, &edata);
        if (ret < 0) {
+               dev_err(dev, "failed to get event from devfreq-event devices\n");
                stat->total_time = stat->busy_time = 0;
                goto err;
        }