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SubjectRe: [PATCH 2/5] pinctrl: rockchip: fix leaked of_node references
Date
Hi,

Am Freitag, 12. April 2019, 08:02:20 CEST schrieb Wen Yang:
> The call to of_parse_phandle returns a node pointer with refcount
> incremented thus it must be explicitly decremented after the last
> usage.
>
> Detected by coccinelle with the following warnings:
> ./drivers/pinctrl/pinctrl-rockchip.c:3221:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 3196, but without a corresponding object release within this function.
> ./drivers/pinctrl/pinctrl-rockchip.c:3223:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 3196, but without a corresponding object release within this function.
>
> Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Heiko Stuebner <heiko@sntech.de>
> Cc: linux-gpio@vger.kernel.org
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-rockchip@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
> ---
> drivers/pinctrl/pinctrl-rockchip.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
> index 16bf21b..e22d387 100644
> --- a/drivers/pinctrl/pinctrl-rockchip.c
> +++ b/drivers/pinctrl/pinctrl-rockchip.c
> @@ -3195,6 +3195,7 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
>
> node = of_parse_phandle(bank->of_node->parent,
> "rockchip,pmu", 0);
> + of_node_put(node);
> if (!node) {
> if (of_address_to_resource(bank->of_node, 1, &res)) {
> dev_err(info->dev, "cannot find IO resource for bank\n");
>

hmm, the conditional does still use the node pointer, so the of_node_put
should probably be below the whole if clause?


Heiko



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