pinctrl: samsung: Handle memory allocation failure during wakeup banks init

Check if kmemdup failed during wakeup banks initialization.  Otherwise
NULL pointer would be stored under "irq_chip" member of bank and later
dereferenced in interrupt handler.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index 727462c..96068b4 100644 (file)
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -479,6 +479,8 @@ int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
                if (match) {
                        irq_chip = kmemdup(match->data,
                                sizeof(*irq_chip), GFP_KERNEL);
+                       if (!irq_chip)
+                               return -ENOMEM;
                        wkup_np = np;
                        break;
                }