linux-kernel - Re: [PATCH v4] drm/amdgpu: fix multiple memory leaks in acp_hw

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Date:   Wed, 2 Oct 2019 07:47:37 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     Navid Emamdoost <navid.emamdoost@...il.com>,
        Christian König <christian.koenig@....com>,
        Chunming Zhou <David1.Zhou@....com>,
        Alex Deucher <alexander.deucher@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc:     Navid Emamdoost <emamd001@....edu>, Kangjie Lu <kjlu@....edu>,
        Stephen McCamant <smccaman@....edu>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH v4] drm/amdgpu: fix multiple memory leaks in acp_hw_init

> ---

Why did you omit the patch change log at this place?


>  drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c | 34 ++++++++++++++++---------


> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c
> @@ -189,7 +189,7 @@ static int acp_hw_init(void *handle)
…
> +	struct i2s_platform_data *i2s_pdata = NULL;
…

I propose to reconsider this update suggestion once more.


> @@ -393,6 +396,13 @@ static int acp_hw_init(void *handle)
>  	val &= ~ACP_SOFT_RESET__SoftResetAud_MASK;
>  	cgs_write_register(adev->acp.cgs_device, mmACP_SOFT_RESET, val);
>  	return 0;
> +
> +failure:
> +	kfree(i2s_pdata);
> +	kfree(adev->acp.acp_res);
> +	kfree(adev->acp.acp_cell);
> +	kfree(adev->acp.acp_genpd);
> +	return r;
>  }
>
>  /**

Are you going to follow a known programming guideline?
https://wiki.sei.cmu.edu/confluence/display/c/MEM12-C.+Consider+using+a+goto+chain+when+leaving+a+function+on+error+when+using+and+releasing+resources#MEM12-C.Considerusingagotochainwhenleavingafunctiononerrorwhenusingandreleasingresources-CompliantSolution%28copy_process%28%29fromLinuxkernel%29

Regards,
Markus