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authorMattias Wallin <mattias.wallin@stericsson.com>2010-11-04 11:01:31 +0100
committerLiam Girdwood <lrg@slimlogic.co.uk>2011-01-12 14:32:59 +0000
commit63cee946148821bca42be10130b061c2d0f5af7e (patch)
tree62e6df3e72d3ae2d7d3ea2aed89e0e14018b3bfe /drivers/regulator
parent4162cf64973df51fc885825bc9ca4d055891c49f (diff)
downloadlinaro-lsk-63cee946148821bca42be10130b061c2d0f5af7e.tar.gz
regulator: lock supply in regulator enable
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>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/core.c20
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index ba521f0f0fa..81336e23848 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1267,17 +1267,15 @@ static int _regulator_enable(struct regulator_dev *rdev)
{
int ret, delay;
- if (rdev->use_count == 0) {
- /* 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);
- return ret;
- }
+ /* 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);
+ return ret;
}
}