[PATCH 1/2] drm/amdgpu: clarify why we evict vram twice on suspend

[deathsimple@xxxxxxxxxxx (Christian König)]

Am 10.10.2016 um 18:49 schrieb Alex Deucher:
> Update the comment to explain why we do this.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

Reviewed-by: Christian König <christian.koenig at amd.com> for both.

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index bfca676..b88a3b7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -1958,7 +1958,10 @@ int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon)
>   
>   	r = amdgpu_suspend(adev);
>   
> -	/* evict remaining vram memory */
> +	/* evict remaining vram memory
> +	 * This second call to evict vram is to evict the gart page table
> +	 * using the CPU.
> +	 */
>   	amdgpu_bo_evict_vram(adev);
>   
>   	pci_save_state(dev->pdev);