linux-kernel - Re: [PATCH] PCI: mediatek: Fix refcount leak in mtk_pcie_subsys

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Message-ID: <57251e6c-a5e7-2388-f30e-365c56b52a42@collabora.com>
Date:   Thu, 10 Mar 2022 15:48:39 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Miaoqian Lin <linmq006@...il.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Jianjun Wang <jianjun.wang@...iatek.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chuanjia Liu <chuanjia.liu@...iatek.com>,
        linux-pci@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] PCI: mediatek: Fix refcount leak in
 mtk_pcie_subsys_powerup

Il 09/03/22 10:19, Miaoqian Lin ha scritto:
> The of_find_compatible_node() function returns a node pointer with
> refcount incremented, We should use of_node_put() on it when done
> Add the missing of_node_put() to release the refcount.
> 
> Fixes: 87e8657ba99c ("PCI: mediatek: Add new method to get shared pcie-cfg base address")
> Signed-off-by: Miaoqian Lin <linmq006@...il.com>
> Reviewed-by: Miles Chen <miles.chen@...iatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

> ---
>   drivers/pci/controller/pcie-mediatek.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
> index ddfbd4aebdec..be8bd919cb88 100644
> --- a/drivers/pci/controller/pcie-mediatek.c
> +++ b/drivers/pci/controller/pcie-mediatek.c
> @@ -1008,6 +1008,7 @@ static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
>   					   "mediatek,generic-pciecfg");
>   	if (cfg_node) {
>   		pcie->cfg = syscon_node_to_regmap(cfg_node);
> +		of_node_put(cfg_node);
>   		if (IS_ERR(pcie->cfg))
>   			return PTR_ERR(pcie->cfg);
>   	}
>