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authorChanwoo Choi <cw00.choi@samsung.com>2014-03-20 06:59:09 +0400
committerMyungJoo Ham <myungjoo.ham@samsung.com>2014-05-24 12:56:35 +0400
commit45c58e93c501425f73f43a2f572a516a226ebccd (patch)
tree5189a5bd46fc65aa41f275237057c15c60e86a7f /drivers/devfreq
parent4b660a7f5c8099d88d1a43d8ae138965112592c7 (diff)
downloadlinux-45c58e93c501425f73f43a2f572a516a226ebccd.tar.xz
PM / devfreq: exynos4: Fix bug of resource leak and code clean on probe()
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@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'drivers/devfreq')
-rw-r--r--drivers/devfreq/exynos/exynos4_bus.c35
1 files changed, 23 insertions, 12 deletions
diff --git a/drivers/devfreq/exynos/exynos4_bus.c b/drivers/devfreq/exynos/exynos4_bus.c
index e07b0c68c715..4c1bbd923c54 100644
--- a/drivers/devfreq/exynos/exynos4_bus.c
+++ b/drivers/devfreq/exynos/exynos4_bus.c
@@ -763,19 +763,11 @@ static int exynos4_bus_get_dev_status(struct device *dev,
return 0;
}
-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 = {
.initial_freq = 400000,
.polling_ms = 50,
.target = exynos4_bus_target,
.get_dev_status = exynos4_bus_get_dev_status,
- .exit = exynos4_bus_exit,
};
static int exynos4210_init_tables(struct busfreq_data *data)
@@ -1048,8 +1040,11 @@ 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 +1081,39 @@ 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;