From: Christophe JAILLET christophe.jaillet@wanadoo.fr
[ 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: b7da8c5c725c ("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 --- drivers/leds/leds-ktd2692.c | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-)
diff --git a/drivers/leds/leds-ktd2692.c b/drivers/leds/leds-ktd2692.c index 45296aaca9da..02738b5b1dbf 100644 --- a/drivers/leds/leds-ktd2692.c +++ b/drivers/leds/leds-ktd2692.c @@ -259,6 +259,17 @@ static void ktd2692_setup(struct ktd2692_context *led) | 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, struct ktd2692_led_config_data *cfg) { @@ -289,8 +300,14 @@ static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev,
if (led->regulator) { ret = regulator_enable(led->regulator); - if (ret) + if (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); @@ -380,17 +397,9 @@ static int ktd2692_probe(struct platform_device *pdev) static int ktd2692_remove(struct platform_device *pdev) { struct ktd2692_context *led = platform_get_drvdata(pdev); - int ret;
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);
return 0;