pinctrl: core: Hold pinctrldev_list_mutex mutex while traversing pinctrldev_list

This one is missed in commit 44d5f7bb "pinctrl: sink pinctrldev_list_mutex".

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index a97b717e3ad3..ff06582103c0 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -392,6 +392,8 @@ static int pinctrl_get_device_gpio_range(unsigned gpio,
 {
         struct pinctrl_dev *pctldev = NULL;
 
+        mutex_lock(&pinctrldev_list_mutex);
+
         /* Loop over the pin controllers */
         list_for_each_entry(pctldev, &pinctrldev_list, node) {
                 struct pinctrl_gpio_range *range;
@@ -400,10 +402,13 @@ static int pinctrl_get_device_gpio_range(unsigned gpio,
                 if (range != NULL) {
                         *outdev = pctldev;
                         *outrange = range;
+                        mutex_unlock(&pinctrldev_list_mutex);
                         return 0;
                 }
         }
 
+        mutex_unlock(&pinctrldev_list_mutex);
+
         return -EPROBE_DEFER;
 }