[PATCH] pinctrl: falcon: Add of_node_put() before return

[PATCH] pinctrl: falcon: Add of_node_put() before return

[Nishka Dasgupta]

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. Hence add an of_node_put before the return in two
places.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
---
 drivers/pinctrl/pinctrl-falcon.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/pinctrl-falcon.c b/drivers/pinctrl/pinctrl-falcon.c
index ef133a82e612..2257803f6f34 100644
--- a/drivers/pinctrl/pinctrl-falcon.c
+++ b/drivers/pinctrl/pinctrl-falcon.c
@@ -455,12 +455,15 @@ static int pinctrl_falcon_probe(struct platform_device *pdev)
 		falcon_info.clk[*bank] = clk_get(&ppdev->dev, NULL);
 		if (IS_ERR(falcon_info.clk[*bank])) {
 			dev_err(&ppdev->dev, "failed to get clock\n");
+			of_node_put(np)
 			return PTR_ERR(falcon_info.clk[*bank]);
 		}
 		falcon_info.membase[*bank] = devm_ioremap_resource(&pdev->dev,
 								   &res);
-		if (IS_ERR(falcon_info.membase[*bank]))
+		if (IS_ERR(falcon_info.membase[*bank])) {
+			of_node_put(np);
 			return PTR_ERR(falcon_info.membase[*bank]);
+		}
 
 		avail = pad_r32(falcon_info.membase[*bank],
 					LTQ_PADC_AVAIL);
-- 
2.19.1

Re: [PATCH] pinctrl: falcon: Add of_node_put() before return

[Linus Walleij]

On Sun, Aug 4, 2019 at 5:28 PM Nishka Dasgupta <nishkadg.linux@gmail.com> wrote:

> 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. Hence add an of_node_put before the return in two
> places.
> Issue found with Coccinelle.
>
> Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>

Patch applied!

Yours,
Linus Walleij