staging: mt7621-pinctrl: Add of_node_put() before return

Each iteration of for_each_compatible_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. Add an of_node_put before the return.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190716055908.3183-1-nishkadg.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c b/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
index 9b52d44..d0f0679 100644 (file)
--- a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
+++ b/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
@@ -358,12 +358,15 @@ static int rt2880_pinmux_probe(struct platform_device *pdev)
                gpiobase = of_get_property(np, "ralink,gpio-base", NULL);
                if (!ngpio || !gpiobase) {
                        dev_err(&pdev->dev, "failed to load chip info\n");
+                       of_node_put(np);
                        return -EINVAL;
                }
 
                range = devm_kzalloc(p->dev, sizeof(*range), GFP_KERNEL);
-               if (!range)
+               if (!range) {
+                       of_node_put(np);
                        return -ENOMEM;
+               }
                range->name = "pio";
                range->npins = __be32_to_cpu(*ngpio);
                range->base = __be32_to_cpu(*gpiobase);