linux-kernel - Re: [PATCH -next] drm/amdgpu: fix return value check in amdgpu_ttm_debugfs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Tue, 19 Jul 2016 14:26:32 +0200
From:	Christian König <christian.koenig@....com>
To:	Wei Yongjun <weiyj_lk@....com>, <alexander.deucher@....com>,
	<airlied@...ux.ie>, <David1.Zhou@....com>,
	<Felix.Kuehling@....com>, <Jammy.Zhou@....com>
CC:	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] drm/amdgpu: fix return value check in
 amdgpu_ttm_debugfs_init()

Am 19.07.2016 um 14:15 schrieb Wei Yongjun:
> From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
>
> In case of error, the function debugfs_create_file() returns NULL
> pointer not ERR_PTR() if debugfs is enabled. The IS_ERR() test
> in the return value check should be replaced with NULL test.
> (defined(CONFIG_DEBUG_FS) make sure debugfs is enabled)
>
> Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Reviewed-by: Christian König <christian.koenig@....com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index b7742e6..8c569ea 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -1345,16 +1345,16 @@ static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
>   
>   	ent = debugfs_create_file("amdgpu_vram", S_IFREG | S_IRUGO, root,
>   				  adev, &amdgpu_ttm_vram_fops);
> -	if (IS_ERR(ent))
> -		return PTR_ERR(ent);
> +	if (!ent)
> +		return -ENOMEM;
>   	i_size_write(ent->d_inode, adev->mc.mc_vram_size);
>   	adev->mman.vram = ent;
>   
>   #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
>   	ent = debugfs_create_file("amdgpu_gtt", S_IFREG | S_IRUGO, root,
>   				  adev, &amdgpu_ttm_gtt_fops);
> -	if (IS_ERR(ent))
> -		return PTR_ERR(ent);
> +	if (!ent)
> +		return -ENOMEM;
>   	i_size_write(ent->d_inode, adev->mc.gtt_size);
>   	adev->mman.gtt = ent;
>
>