pinctrl: samsung: Add of_node_put() before return in error path

Each iteration of for_each_child_of_node puts the previous node, but in
the case of a return from the middle of the loop, there is no put, thus
causing a memory leak. Hence add an of_node_put before the return of
exynos_eint_wkup_init() error path.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Cc: <stable@vger.kernel.org>
Fixes: 14c255d35b25 ("pinctrl: exynos: Add irq_chip instance for Exynos7 wakeup interrupts")
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 ebc27b0..e7f4cba 100644 (file)
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -486,8 +486,10 @@ 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)
+                       if (!irq_chip) {
+                               of_node_put(np);
                                return -ENOMEM;
+                       }
                        wkup_np = np;
                        break;
                }