netdev - RE: [PATCH net v1] net: macb: fix an issue about leak related system resources

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Message-ID: <MN2PR13MB355263F89012F7D742DAE5FA8CAF0@MN2PR13MB3552.namprd13.prod.outlook.com>
Date:   Mon, 27 Apr 2020 08:25:41 +0000
From:   Yash Shah <yash.shah@...ive.com>
To:     Dejin Zheng <zhengdejin5@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        "palmer@...belt.com" <palmer@...belt.com>,
        "nicolas.ferre@...rochip.com" <nicolas.ferre@...rochip.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: RE: [PATCH net v1] net: macb: fix an issue about leak related system
 resources

> -----Original Message-----
> From: Dejin Zheng <zhengdejin5@...il.com>
> Sent: 25 April 2020 18:28
> To: davem@...emloft.net; Paul Walmsley <paul.walmsley@...ive.com>;
> palmer@...belt.com; nicolas.ferre@...rochip.com; Yash Shah
> <yash.shah@...ive.com>; netdev@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org; Dejin Zheng <zhengdejin5@...il.com>;
> Andy Shevchenko <andy.shevchenko@...il.com>
> Subject: [PATCH net v1] net: macb: fix an issue about leak related system
> resources
> 
> [External Email] Do not click links or attachments unless you recognize the
> sender and know the content is safe
> 
> A call of the function macb_init() can fail in the function fu540_c000_init. The
> related system resources were not released then. use devm_ioremap() to
> replace ioremap() for fix it.
> 
> Fixes: c218ad559020ff9 ("macb: Add support for SiFive FU540-C000")
> Cc: Andy Shevchenko <andy.shevchenko@...il.com>
> Signed-off-by: Dejin Zheng <zhengdejin5@...il.com>
> ---
>  drivers/net/ethernet/cadence/macb_main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/cadence/macb_main.c
> b/drivers/net/ethernet/cadence/macb_main.c
> index a0e8c5bbabc0..edba2eb56231 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -4178,7 +4178,7 @@ static int fu540_c000_init(struct platform_device
> *pdev)
>         if (!res)
>                 return -ENODEV;
> 
> -       mgmt->reg = ioremap(res->start, resource_size(res));
> +       mgmt->reg = devm_ioremap(&pdev->dev, res->start,
> + resource_size(res));
>         if (!mgmt->reg)
>                 return -ENOMEM;
> 
> --
> 2.25.0

The change looks good to me.
Reviewed-by: Yash Shah <yash.shah@...ive.com>

- Yash