[PATCH] drm/amdgpu: Use correct size when access vram

[Christian König]

Am 22.03.21 um 01:53 schrieb xinhui pan:
> To make size is 4 byte aligned. Use &~0x3ULL instead of &3ULL.
>
> Signed-off-by: xinhui pan <xinhui.pan at amd.com>

Good catch. Patch is Reviewed-by: Christian König <christian.koenig at amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 6d5cf0525325..41a4c456961c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -1503,7 +1503,7 @@ static int amdgpu_ttm_access_memory(struct ttm_buffer_object *bo,
>   				memcpy(buf, &value, bytes);
>   			}
>   		} else {
> -			bytes = cursor.size & 0x3ull;
> +			bytes = cursor.size & ~0x3ULL;
>   			amdgpu_device_vram_access(adev, cursor.start,
>   						  (uint32_t *)buf, bytes,
>   						  write);