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Input: drv2665 - use guard notation when acquiring mutex

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Using guard notation makes the code more compact and error handling
more robust by ensuring that mutexes are released in all code paths
when control leaves critical section.

Reviewed-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://lore.kernel.org/r/20240904044244.1042174-9-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2024-09-03 21:42:28 -07:00
parent 0a54609a89
commit cf3f3a08e1
1 changed files with 21 additions and 23 deletions
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44
drivers/input/misc/drv2665.c
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@ -225,59 +225,57 @@ static int drv2665_probe(struct i2c_client *client)
static int drv2665_suspend(struct device *dev)
{
struct drv2665_data *haptics = dev_get_drvdata(dev);
int ret = 0;
int error;
mutex_lock(&haptics->input_dev->mutex);
guard(mutex)(&haptics->input_dev->mutex);
if (input_device_enabled(haptics->input_dev)) {
ret = regmap_update_bits(haptics->regmap, DRV2665_CTRL_2,
DRV2665_STANDBY, DRV2665_STANDBY);
if (ret) {
error = regmap_update_bits(haptics->regmap, DRV2665_CTRL_2,
DRV2665_STANDBY, DRV2665_STANDBY);
if (error) {
dev_err(dev, "Failed to set standby mode\n");
regulator_disable(haptics->regulator);
goto out;
return error;
}
ret = regulator_disable(haptics->regulator);
if (ret) {
error = regulator_disable(haptics->regulator);
if (error) {
dev_err(dev, "Failed to disable regulator\n");
regmap_update_bits(haptics->regmap,
DRV2665_CTRL_2,
DRV2665_STANDBY, 0);
return error;
}
}
out:
mutex_unlock(&haptics->input_dev->mutex);
return ret;
return 0;
}
static int drv2665_resume(struct device *dev)
{
struct drv2665_data *haptics = dev_get_drvdata(dev);
int ret = 0;
int error;
mutex_lock(&haptics->input_dev->mutex);
guard(mutex)(&haptics->input_dev->mutex);
if (input_device_enabled(haptics->input_dev)) {
ret = regulator_enable(haptics->regulator);
if (ret) {
error = regulator_enable(haptics->regulator);
if (error) {
dev_err(dev, "Failed to enable regulator\n");
goto out;
return error;
}
ret = regmap_update_bits(haptics->regmap, DRV2665_CTRL_2,
DRV2665_STANDBY, 0);
if (ret) {
error = regmap_update_bits(haptics->regmap, DRV2665_CTRL_2,
DRV2665_STANDBY, 0);
if (error) {
dev_err(dev, "Failed to unset standby mode\n");
regulator_disable(haptics->regulator);
goto out;
return error;
}
}
out:
mutex_unlock(&haptics->input_dev->mutex);
return ret;
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(drv2665_pm_ops, drv2665_suspend, drv2665_resume);