gpiolib: of: fix a memory leak in of_gpio_flags_quirks()

commit 89fea04c85e85f21ef4937611055abce82330d48 upstream.

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

Cc: <stable@vger.kernel.org>
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
[Bartosz: tweaked the commit message]
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 6a3ec575a404ed9fa3dfcf8c78e56381789a8c02..6779853f166b3ab7547f2bdae0d451828156cdaa 100644 (file)
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -155,6 +155,7 @@ static void of_gpio_flags_quirks(struct device_node *np,
                                                        of_node_full_name(child));
                                        *flags |= OF_GPIO_ACTIVE_LOW;
                                }
+                               of_node_put(child);
                                break;
                        }
                }