linux-kernel - Re: [PATCH v3] media: aspeed-video: Fix memory leaks in aspeed_video

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Date:   Mon, 28 Oct 2019 10:55:24 -0700
From:   Jae Hyun Yoo <jae.hyun.yoo@...ux.intel.com>
To:     Navid Emamdoost <navid.emamdoost@...il.com>
Cc:     linux-aspeed@...ts.ozlabs.org, Andrew Jeffery <andrew@...id.au>,
        kjlu@....edu, openbmc@...ts.ozlabs.org,
        Eddie James <eajames@...ux.ibm.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        emamd001@....edu, smccaman@....edu,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3] media: aspeed-video: Fix memory leaks in
 aspeed_video_probe

On 10/28/2019 10:18 AM, Navid Emamdoost wrote:
> In the implementation of aspeed_video_probe() the allocated memory for
> video should be released if either devm_ioremap_resource()
> or aspeed_video_init() or aspeed_video_setup_video() fails. Replace
> kzalloc() with devm_kzalloc to avoid explicit release for video.
> 
> Fixes: d2b4387f3bdf ("media: platform: Add Aspeed Video Engine driver")
> Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
> ---
> Changes in v3:
> 	-- fix call to devm_kzalloc()

Better keep all change history at here.

> ---
>   drivers/media/platform/aspeed-video.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
> index eb12f3793062..70797b41447c 100644
> --- a/drivers/media/platform/aspeed-video.c
> +++ b/drivers/media/platform/aspeed-video.c
> @@ -1646,7 +1646,8 @@ static int aspeed_video_probe(struct platform_device *pdev)
>   {
>   	int rc;
>   	struct resource *res;
> -	struct aspeed_video *video = kzalloc(sizeof(*video), GFP_KERNEL);
> +	struct aspeed_video *video =
> +		devm_kzalloc(&pdev->dev, sizeof(*video), GFP_KERNEL);

For a case of assignment in definition section, let it go over the 80
chars.

With this fixed:

Reviewed-by: Jae Hyun Yoo <jae.hyun.yoo@...ux.intel.com>

>   	if (!video)
>   		return -ENOMEM;
>