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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 4162cf6497
commit 63cee94614
1 changed files with 9 additions and 11 deletions
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20
drivers/regulator/core.c
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@ -1267,17 +1267,15 @@ static int _regulator_enable(struct regulator_dev *rdev)
{ {
int ret, delay; int ret, delay;
if (rdev->use_count == 0) { /* do we need to enable the supply regulator first */
/* do we need to enable the supply regulator first */ if (rdev->supply) {
if (rdev->supply) { mutex_lock(&rdev->supply->mutex);
mutex_lock(&rdev->supply->mutex); ret = _regulator_enable(rdev->supply);
ret = _regulator_enable(rdev->supply); mutex_unlock(&rdev->supply->mutex);
mutex_unlock(&rdev->supply->mutex); if (ret < 0) {
if (ret < 0) { printk(KERN_ERR "%s: failed to enable %s: %d\n",
printk(KERN_ERR "%s: failed to enable %s: %d\n", __func__, rdev_get_name(rdev), ret);
__func__, rdev_get_name(rdev), ret); return ret;
return ret;
}
} }
} }