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Commit 5ffbe2e6 authored by Axel Lin's avatar Axel Lin Committed by Linus Walleij
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pinctrl: core: Hold pctldev->mutex mutex lock while traversing gpio_ranges list 



Hold pctldev->mutex mutex_lock when traverse the list.

Signed-off-by: default avatarAxel Lin <axel.lin@ingics.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent f0059021

drivers/pinctrl/core.c

+3 −0
Original line number Diff line number Diff line
@@ -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);