lkml.org 
[lkml]   [2021]   [Jul]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.10 549/593] leds: ktd2692: Fix an error handling path
Date
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 632f10db4b3f..f341da1503a4 100644
--- a/drivers/leds/leds-ktd2692.c
+++ b/drivers/leds/leds-ktd2692.c
@@ -256,6 +256,17 @@ 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)
{
@@ -286,8 +297,14 @@ 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);
@@ -377,17 +394,9 @@ 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;
--
2.30.2


\
 
 \ /
  Last update: 2021-07-12 09:14    [W:1.977 / U:0.384 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site