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Subject[PATCHv4 1/5] devfreq: exynos4: Fix bug of resource leak and code clean on probe()
Date
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>
---
drivers/devfreq/exynos/exynos4_bus.c | 35 +++++++++++++++++++++++------------
1 file changed, 23 insertions(+), 12 deletions(-)

diff --git a/drivers/devfreq/exynos/exynos4_bus.c b/drivers/devfreq/exynos/exynos4_bus.c
index e07b0c6..4c1bbd9 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;
--
1.8.0


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