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regulator: Fix _regulator_get_voltage if get_voltage callback is NULL

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In the case of get_voltage callback is NULL, current implementation in
_regulator_get_voltage will return -EINVAL.

Also returns proper error if ret is negative value.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Axel Lin 2011-05-23 20:08:10 +08:00 committed by Liam Girdwood
parent 5ccee4ae8e
commit cb220d16f9
1 changed files with 5 additions and 3 deletions
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8
drivers/regulator/core.c
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@ -1886,12 +1886,14 @@ static int _regulator_get_voltage(struct regulator_dev *rdev)
if (sel < 0)
return sel;
ret = rdev->desc->ops->list_voltage(rdev, sel);
}
if (rdev->desc->ops->get_voltage)
} else if (rdev->desc->ops->get_voltage) {
ret = rdev->desc->ops->get_voltage(rdev);
else
} else {
return -EINVAL;
}
if (ret < 0)
return ret;
return ret - rdev->constraints->uV_offset;
}