linux-kernel - Re: [PATCH 1/4] PCI/dwc: fix potential memory leak

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Date:   Mon, 5 Nov 2018 12:18:37 +0000
From:   Gustavo Pimentel <gustavo.pimentel@...opsys.com>
To:     "Z.q. Hou" <zhiqiang.hou@....com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "jingoohan1@...il.com" <jingoohan1@...il.com>,
        "gustavo.pimentel@...opsys.com" <gustavo.pimentel@...opsys.com>
CC:     Roy Zang <roy.zang@....com>, Mingkai Hu <mingkai.hu@....com>,
        "M.h. Lian" <minghuan.lian@....com>
Subject: Re: [PATCH 1/4] PCI/dwc: fix potential memory leak

On 25/10/2018 10:22, Z.q. Hou wrote:
> From: Hou Zhiqiang <Zhiqiang.Hou@....com>
> 
> Free the allocated pci_host_bridge struct when failed to get
> host bridge resources, and free the resource windows before
> free the bridge.
> 
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
> ---
>  drivers/pci/controller/dwc/pcie-designware-host.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index 29a05759a294..ecacce016489 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -353,7 +353,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
>  	ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
>  					&bridge->windows, &pp->io_base);
>  	if (ret)
> -		return ret;
> +		goto error;
>  
>  	ret = devm_request_pci_bus_resources(dev, &bridge->windows);
>  	if (ret)
> @@ -502,6 +502,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
>  	return 0;
>  
>  error:
> +	pci_free_resource_list(&bridge->windows);
>  	pci_free_host_bridge(bridge);
>  	return ret;
>  }
> 

Thanks for the memory leak fix. :)

Acked-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>