linux-kernel - Re: [PATCH] drm/amdgpu: check memory allocation failure

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Date:   Thu, 24 Aug 2017 14:23:19 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Christian König <christian.koenig@....com>
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        "Deucher, Alexander" <alexander.deucher@....com>,
        Dave Airlie <airlied@...ux.ie>, "monk.liu" <Monk.Liu@....com>,
        Chunming Zhou <David1.Zhou@....com>,
        Alex Xie <AlexBin.Xie@....com>,
        Junwei Zhang <Jerry.Zhang@....com>,
        Dave Airlie <airlied@...hat.com>,
        Marek Olšák <marek.olsak@....com>,
        John Brooks <john@...tquake.com>,
        Andres Rodriguez <andresx7@...il.com>,
        Huang Rui <ray.huang@....com>, kernel-janitors@...r.kernel.org,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/amdgpu: check memory allocation failure

On Wed, Aug 23, 2017 at 4:39 AM, Christian König
<christian.koenig@....com> wrote:
> Am 23.08.2017 um 07:52 schrieb Christophe JAILLET:
>>
>> Check memory allocation failure and return -ENOMEM in such a case.
>>
>> 'num_post_dep_syncobjs' still has to be set to 0 before the test in order
>> to have it initialized if 'amdgpu_cs_parser_fini()' is called to free
>> resources.
>>
>> The calling graph would be, in such a case!
>>     failure in amdgpu_cs_process_syncobj_out_dep()
>>        ---> error code returned by amdgpu_cs_dependencies()
>>           --> amdgpu_cs_parser_fini() is called
>>
>> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
>
>
> Reviewed-by: Christian König <christian.koenig@....com>

Applied.  thanks!

Alex

>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>> index 15d4a28d73bb..baa90df90aea 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
>> @@ -1079,6 +1079,9 @@ static int amdgpu_cs_process_syncobj_out_dep(struct
>> amdgpu_cs_parser *p,
>>                                              GFP_KERNEL);
>>         p->num_post_dep_syncobjs = 0;
>>   +     if (!p->post_dep_syncobjs)
>> +               return -ENOMEM;
>> +
>>         for (i = 0; i < num_deps; ++i) {
>>                 p->post_dep_syncobjs[i] = drm_syncobj_find(p->filp,
>> deps[i].handle);
>>                 if (!p->post_dep_syncobjs[i])
>
>
>
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> dri-devel@...ts.freedesktop.org
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