linux-kernel - Re: [PATCH] drm/amd: Remove null check before kfree

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Message-ID: <CADnq5_NQgz_vz9ntx6q4HqZ21zjgx7NEsnq7wZncCS6qx4Z7Uw@mail.gmail.com>
Date:   Tue, 29 Aug 2017 15:43:12 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Christian König <christian.koenig@....com>
Cc:     Himanshu Jha <himanshujha199640@...il.com>,
        Dave Airlie <airlied@...ux.ie>,
        "Deucher, Alexander" <alexander.deucher@....com>,
        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/amd: Remove null check before kfree

On Tue, Aug 29, 2017 at 9:28 AM, Christian König
<christian.koenig@....com> wrote:
> Am 29.08.2017 um 15:21 schrieb Himanshu Jha:
>>
>> Kfree on NULL pointer is a no-op and therefore checking is redundant.
>>
>> Signed-off-by: Himanshu Jha <himanshujha199640@...il.com>
>
>
> Reviewed-by: Christian König <christian.koenig@....com>
>

Applied.  thanks!

Alex

>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c     | 6 ++----
>>   drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c | 6 ++----
>>   2 files changed, 4 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
>> index 8d1cf2d..f51b41f 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
>> @@ -346,10 +346,8 @@ static void amdgpu_connector_free_edid(struct
>> drm_connector *connector)
>>   {
>>         struct amdgpu_connector *amdgpu_connector =
>> to_amdgpu_connector(connector);
>>   -     if (amdgpu_connector->edid) {
>> -               kfree(amdgpu_connector->edid);
>> -               amdgpu_connector->edid = NULL;
>> -       }
>> +       kfree(amdgpu_connector->edid);
>> +       amdgpu_connector->edid = NULL;
>>   }
>>     static int amdgpu_connector_ddc_get_modes(struct drm_connector
>> *connector)
>> diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c
>> b/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c
>> index 76347ff..00075c2 100644
>> --- a/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c
>> +++ b/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c
>> @@ -606,10 +606,8 @@ int smu7_init(struct pp_smumgr *smumgr)
>>     int smu7_smu_fini(struct pp_smumgr *smumgr)
>>   {
>> -       if (smumgr->backend) {
>> -               kfree(smumgr->backend);
>> -               smumgr->backend = NULL;
>> -       }
>> +       kfree(smumgr->backend);
>> +       smumgr->backend = NULL;
>>         cgs_rel_firmware(smumgr->device, CGS_UCODE_ID_SMU);
>>         return 0;
>>   }
>
>
>
> _______________________________________________
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> amd-gfx@...ts.freedesktop.org
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