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regulator: lock supply in regulator enable

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This patch add locks around regulator supply enable.

Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mattias Wallin 2010-11-04 11:01:31 +01:00 committed by Liam Girdwood
parent 7727da22e8
commit 3aa713e76e
1 changed files with 2 additions and 0 deletions
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2
drivers/regulator/core.c
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@ -1269,7 +1269,9 @@ static int _regulator_enable(struct regulator_dev *rdev)
/* do we need to enable the supply regulator first */
if (rdev->supply) {
mutex_lock(&rdev->supply->mutex);
ret = _regulator_enable(rdev->supply);
mutex_unlock(&rdev->supply->mutex);
if (ret < 0) {
printk(KERN_ERR "%s: failed to enable %s: %d\n",
__func__, rdev_get_name(rdev), ret);