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regulator: Push locking for regulator_is_enabled() out 

Allows use by more of the internal regulator API code.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2009-08-03 18:49:56 +01:00 committed by Liam Girdwood
parent f25e0b4fcc
commit 9332546fe8
1 changed files with 16 additions and 14 deletions
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30
drivers/regulator/core.c
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@ -280,8 +280,13 @@ static ssize_t regulator_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct regulator_dev *rdev = dev_get_drvdata(dev);
ssize_t ret;
return regulator_print_state(buf, _regulator_is_enabled(rdev));
mutex_lock(&rdev->mutex);
ret = regulator_print_state(buf, _regulator_is_enabled(rdev));
mutex_unlock(&rdev->mutex);
return ret;
}
static DEVICE_ATTR(state, 0444, regulator_state_show, NULL);
@ -1365,20 +1370,11 @@ EXPORT_SYMBOL_GPL(regulator_force_disable);
static int _regulator_is_enabled(struct regulator_dev *rdev)
{
int ret;
mutex_lock(&rdev->mutex);
/* sanity check */
if (!rdev->desc->ops->is_enabled) {
ret = -EINVAL;
goto out;
}
if (!rdev->desc->ops->is_enabled)
return -EINVAL;
ret = rdev->desc->ops->is_enabled(rdev);
out:
mutex_unlock(&rdev->mutex);
return ret;
return rdev->desc->ops->is_enabled(rdev);
}
/**
@ -1395,7 +1391,13 @@ static int _regulator_is_enabled(struct regulator_dev *rdev)
*/
int regulator_is_enabled(struct regulator *regulator)
{
return _regulator_is_enabled(regulator->rdev);
int ret;
mutex_lock(&regulator->rdev->mutex);
ret = _regulator_is_enabled(regulator->rdev);
mutex_unlock(&regulator->rdev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(regulator_is_enabled);