[PATCH] drm/amdgpu: remove invalid resource->start check

[Pierre-Eric Pelloux-Prayer]

On my kernel branch this produces an "unused variable" warning for 'bus_size' so it
should be dropped as well.

Pierre-Eric

Le 21/03/2024 à 13:25, Pierre-Eric Pelloux-Prayer a écrit :
> 
> Le 20/03/2024 à 13:49, Christian König a écrit :
>> The majority of those where removed in the patch aed01a68047b
>> drm/amdgpu: Remove TTM resource->start visible VRAM condition v2
>>
>> But this one was missed because it's working on the resource and not the
>> BO. Since we also no longer use a fake start address for visible BOs
>> this will now trigger invalid mapping errors.
>>
>> Fixes: aed01a68047b ("drm/amdgpu: Remove TTM resource->start visible VRAM condition v2")
>> Signed-off-by: Christian König <christian.koenig at amd.com>
>> CC: stable at vger.kernel.org
> 
> 
> Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>
> 
> Thanks!
> 
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 3 ---
>>   1 file changed, 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> index b0ed10f4de60..6bd7e71c5ff6 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> @@ -573,9 +573,6 @@ static int amdgpu_ttm_io_mem_reserve(struct ttm_device *bdev,
>>           break;
>>       case TTM_PL_VRAM:
>>           mem->bus.offset = mem->start << PAGE_SHIFT;
>> -        /* check if it's visible */
>> -        if ((mem->bus.offset + bus_size) > adev->gmc.visible_vram_size)
>> -            return -EINVAL;
>>           if (adev->mman.aper_base_kaddr &&
>>               mem->placement & TTM_PL_FLAG_CONTIGUOUS)