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authorAxel Lin <axel.lin@ingics.com>2013-08-18 20:40:29 +0800
committerLinus Walleij <linus.walleij@linaro.org>2013-08-23 08:56:28 +0200
commit5ffbe2e613873222474a0f575296187002a8995d (patch)
tree6322c9986f795f846f549d5b4f8bc10483f11273 /drivers/pinctrl
parentf0059021084137b4ffd2ffc7ee4b62a895c4c84a (diff)
pinctrl: core: Hold pctldev->mutex mutex lock while traversing gpio_ranges list
Hold pctldev->mutex mutex_lock when traverse the list. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/core.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index ff06582103c0..faeb8726aee0 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);