[PATCH 2/2] pinctrl: core: Hold pctldev->mutex mutex lock while traversing gpio_ranges list

[Axel Lin]

Hold pctldev->mutex mutex_lock when traverse the list.

Signed-off-by: Axel Lin <axel....@ingics.com>
---
 drivers/pinctrl/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index c670527..4adef2f 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);
-- 
1.8.1.2



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