linux-kernel - Re: [PATCH] media: rga: fix possible memory leak in rga

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Date:   Fri, 8 Apr 2022 10:18:24 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     jacob-chen@...wrt.com, ezequiel@...guardiasur.com.ar,
        mchehab@...nel.org, heiko@...ech.de
Cc:     linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: rga: fix possible memory leak in rga_probe

Gentle ping.

On 2022/3/24 16:37, Hangyu Hua wrote:
> rga->m2m_dev needs to be freed when rga_probe fails.
> 
> Signed-off-by: Hangyu Hua <hbh25y@...il.com>
> ---
>   drivers/media/platform/rockchip/rga/rga.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/platform/rockchip/rga/rga.c b/drivers/media/platform/rockchip/rga/rga.c
> index 4de5e8d2b261..c2ce4fdcdb7f 100644
> --- a/drivers/media/platform/rockchip/rga/rga.c
> +++ b/drivers/media/platform/rockchip/rga/rga.c
> @@ -865,7 +865,7 @@ static int rga_probe(struct platform_device *pdev)
>   
>   	ret = pm_runtime_resume_and_get(rga->dev);
>   	if (ret < 0)
> -		goto rel_vdev;
> +		goto rel_m2m;
>   
>   	rga->version.major = (rga_read(rga, RGA_VERSION_INFO) >> 24) & 0xFF;
>   	rga->version.minor = (rga_read(rga, RGA_VERSION_INFO) >> 20) & 0x0F;
> @@ -881,7 +881,7 @@ static int rga_probe(struct platform_device *pdev)
>   					   DMA_ATTR_WRITE_COMBINE);
>   	if (!rga->cmdbuf_virt) {
>   		ret = -ENOMEM;
> -		goto rel_vdev;
> +		goto rel_m2m;
>   	}
>   
>   	rga->src_mmu_pages =
> @@ -918,6 +918,8 @@ static int rga_probe(struct platform_device *pdev)
>   free_dma:
>   	dma_free_attrs(rga->dev, RGA_CMDBUF_SIZE, rga->cmdbuf_virt,
>   		       rga->cmdbuf_phy, DMA_ATTR_WRITE_COMBINE);
> +rel_m2m:
> +	v4l2_m2m_release(rga->m2m_dev);
>   rel_vdev:
>   	video_device_release(vfd);
>   unreg_v4l2_dev: