This patch fix bug about resource leak when happening probe fail and code clean
to add debug message.
Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
---
drivers/devfreq/exynos/exynos4_bus.c | 30 +++++++++++++++++++++++-------
1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/drivers/devfreq/exynos/exynos4_bus.c b/drivers/devfreq/exynos/exynos4_bus.c
index e07b0c6..378e4bd 100644
--- a/drivers/devfreq/exynos/exynos4_bus.c
+++ b/drivers/devfreq/exynos/exynos4_bus.c
@@ -765,9 +765,6 @@ static int exynos4_bus_get_dev_status(struct device *dev,
static void exynos4_bus_exit(struct device *dev)
{
- struct busfreq_data *data = dev_get_drvdata(dev);
-
- devfreq_unregister_opp_notifier(dev, data->devfreq);
}
static struct devfreq_dev_profile exynos4_devfreq_profile = {
@@ -1048,8 +1045,11 @@ static int exynos4_busfreq_probe(struct platform_device *pdev)
dev_err(dev, "Cannot determine the device id %d\n", data->type);
err = -EINVAL;
}
- if (err)
+ if (err) {
+ dev_err(dev, "Cannot initialize busfreq table %d\n",
+ data->type);
return err;
+ }
data->vdd_int = devm_regulator_get(dev, "vdd_int");
if (IS_ERR(data->vdd_int)) {
@@ -1086,23 +1086,39 @@ static int exynos4_busfreq_probe(struct platform_device *pdev)
if (IS_ERR(data->devfreq))
return PTR_ERR(data->devfreq);
- devfreq_register_opp_notifier(dev, data->devfreq);
+ /* Register opp_notifier for Exynos4 busfreq */
+ err = devfreq_register_opp_notifier(dev, data->devfreq);
+ if (err < 0) {
+ dev_err(dev, "Failed to register opp notifier\n");
+ goto err_notifier_opp;
+ }
+ /* Register pm_notifier for Exynos4 busfreq */
err = register_pm_notifier(&data->pm_notifier);
if (err) {
dev_err(dev, "Failed to setup pm notifier\n");
- devfreq_remove_device(data->devfreq);
- return err;
+ goto err_notifier_pm;
}
return 0;
+
+err_notifier_pm:
+ devfreq_unregister_opp_notifier(dev, data->devfreq);
+err_notifier_opp:
+ devfreq_remove_device(data->devfreq);
+
+ return err;
}
static int exynos4_busfreq_remove(struct platform_device *pdev)
{
struct busfreq_data *data = platform_get_drvdata(pdev);
+ /* Unregister all of notifier chain */
unregister_pm_notifier(&data->pm_notifier);
+ devfreq_unregister_opp_notifier(data->dev, data->devfreq);
+
+ /* Remove devfreq instance */
devfreq_remove_device(data->devfreq);
return 0;
--
1.8.0
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