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leds: ktd2692: Fix an error handling path

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[ Upstream commit ee78b9360e14c276f5ceaa4a0d06f790f04ccdad ]

In 'ktd2692_parse_dt()', if an error occurs after a successful
'regulator_enable()' call, we should call 'regulator_enable()'.

This is the same in 'ktd2692_probe()', if an error occurs after a
successful 'ktd2692_parse_dt()' call.

Instead of adding 'regulator_enable()' in several places, implement a
resource managed solution and simplify the remove function accordingly.

Fixes: b7da8c5c72 ("leds: Add ktd2692 flash LED driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christophe JAILLET 2021-05-21 13:21:01 +02:00 committed by Greg Kroah-Hartman
parent 53cb671592
commit 57e49a0bc4
1 changed files with 18 additions and 9 deletions
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27
drivers/leds/leds-ktd2692.c
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@ -256,6 +256,17 @@ static void ktd2692_setup(struct ktd2692_context *led)
| KTD2692_REG_FLASH_CURRENT_BASE); | KTD2692_REG_FLASH_CURRENT_BASE);
} }
static void regulator_disable_action(void *_data)
{
struct device *dev = _data;
struct ktd2692_context *led = dev_get_drvdata(dev);
int ret;
ret = regulator_disable(led->regulator);
if (ret)
dev_err(dev, "Failed to disable supply: %d\n", ret);
}
static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev, static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev,
struct ktd2692_led_config_data *cfg) struct ktd2692_led_config_data *cfg)
{ {
@ -286,8 +297,14 @@ static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev,
if (led->regulator) { if (led->regulator) {
ret = regulator_enable(led->regulator); ret = regulator_enable(led->regulator);
if (ret) if (ret) {
dev_err(dev, "Failed to enable supply: %d\n", ret); dev_err(dev, "Failed to enable supply: %d\n", ret);
} else {
ret = devm_add_action_or_reset(dev,
regulator_disable_action, dev);
if (ret)
return ret;
}
} }
child_node = of_get_next_available_child(np, NULL); child_node = of_get_next_available_child(np, NULL);
@ -377,17 +394,9 @@ static int ktd2692_probe(struct platform_device *pdev)
static int ktd2692_remove(struct platform_device *pdev) static int ktd2692_remove(struct platform_device *pdev)
{ {
struct ktd2692_context *led = platform_get_drvdata(pdev); struct ktd2692_context *led = platform_get_drvdata(pdev);
int ret;
led_classdev_flash_unregister(&led->fled_cdev); led_classdev_flash_unregister(&led->fled_cdev);
if (led->regulator) {
ret = regulator_disable(led->regulator);
if (ret)
dev_err(&pdev->dev,
"Failed to disable supply: %d\n", ret);
}
mutex_destroy(&led->lock); mutex_destroy(&led->lock);
return 0; return 0;