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>
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 711fa17..27d062e 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1269,7 +1269,9 @@
/* 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);