diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index ff06582103c01021c78b29c1e782ed05c36a4088..faeb8726aee0a2fc7df416d0076299f631cd18c9 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -357,14 +357,17 @@ static bool pinctrl_ready_for_gpio_range(unsigned gpio)
 	/* Loop over the pin controllers */
 	list_for_each_entry(pctldev, &pinctrldev_list, node) {
 		/* Loop over the ranges */
+		mutex_lock(&pctldev->mutex);
 		list_for_each_entry(range, &pctldev->gpio_ranges, node) {
 			/* Check if any gpio range overlapped with gpio chip */
 			if (range->base + range->npins - 1 < chip->base ||
 			    range->base > chip->base + chip->ngpio - 1)
 				continue;
+			mutex_unlock(&pctldev->mutex);
 			mutex_unlock(&pinctrldev_list_mutex);
 			return true;
 		}
+		mutex_unlock(&pctldev->mutex);
 	}
 
 	mutex_unlock(&pinctrldev_list_mutex);