linux-kernel - Re: [PATCH -next] drm/amdgpu: use kmemdup rather than duplicating its implementation

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Message-ID: <f37296c1-40db-38dc-1976-0d4a1ab8c2ca@gmail.com>
Date:	Mon, 1 Aug 2016 13:16:54 +0100
From:	Nicolai Hähnle <nhaehnle@...il.com>
To:	"Deucher, Alexander" <Alexander.Deucher@....com>,
	'Sean Paul' <seanpaul@...gle.com>,
	Wei Yongjun <weiyj.lk@...il.com>
Cc:	"Nath, Arindam" <Arindam.Nath@....com>,
	"Zhou, Jammy" <Jammy.Zhou@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	"Jiang, Sonny" <Sonny.Jiang@....com>, "Liu, Leo" <Leo.Liu@....com>,
	"Koenig, Christian" <Christian.Koenig@....com>,
	"Liu, Monk" <Monk.Liu@....com>
Subject: Re: [PATCH -next] drm/amdgpu: use kmemdup rather than duplicating its
 implementation

On 29.07.2016 20:38, Deucher, Alexander wrote:
>> -----Original Message-----
>> From: Sean Paul [mailto:seanpaul@...gle.com]
>> Sent: Friday, July 29, 2016 3:35 PM
>> To: Wei Yongjun
>> Cc: Deucher, Alexander; Koenig, Christian; Dave Airlie; Jiang, Sonny; Liu, Leo;
>> Nath, Arindam; Zhou, David(ChunMing); Zhou, Jammy; Liu, Monk; dri-devel;
>> Linux Kernel Mailing List
>> Subject: Re: [PATCH -next] drm/amdgpu: use kmemdup rather than
>> duplicating its implementation
>>
>> On Thu, Jul 28, 2016 at 12:18 PM, Wei Yongjun <weiyj.lk@...il.com> wrote:
>>> Use kmemdup rather than duplicating its implementation.
>>>
>>> Generated by: scripts/coccinelle/api/memdup.cocci
>>>
>>> Signed-off-by: Wei Yongjun <weiyj.lk@...il.com>
>>
>>
>> Thanks for the patch. I'll apply this to -misc once the merge window is closed.
>>
>> Acked-by: Sean Paul <seanpaul@...omium.org>
>
> Unless you've already applied this to the misc tree, I'd prefer to take it via the amdgpu tree.

I recall Christian NAKing an almost identical patch some time ago. 
Something about needing memcpy_fromio()?

Yup, it's here: https://lkml.org/lkml/2016/5/19/235

Cheers,
Nicolai

>
> Alex
>
>>
>>
>>> ---
>>>  drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 4 +---
>>>  1 file changed, 1 insertion(+), 3 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
>>> index a46a64c..b779b5f 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
>>> @@ -296,12 +296,10 @@ int amdgpu_uvd_suspend(struct amdgpu_device
>> *adev)
>>>         size = amdgpu_bo_size(adev->uvd.vcpu_bo);
>>>         ptr = adev->uvd.cpu_addr;
>>>
>>> -       adev->uvd.saved_bo = kmalloc(size, GFP_KERNEL);
>>> +       adev->uvd.saved_bo = kmemdup(ptr, size, GFP_KERNEL);
>>>         if (!adev->uvd.saved_bo)
>>>                 return -ENOMEM;
>>>
>>> -       memcpy(adev->uvd.saved_bo, ptr, size);
>>> -
>>>         return 0;
>>>  }
>>>
>>>
>>>
>>>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>

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