[PATCH 1/1] drm/ttm: Ignore signaled move fences

[Felix Kuehling]

Am 2021-03-01 um 10:09 a.m. schrieb Christian König:
> Am 27.02.21 um 04:45 schrieb Felix Kuehling:
>> Move fences that have already signaled should not prevent memory
>> allocations with no_wait_gpu.
>>
>> Signed-off-by: Felix Kuehling <Felix.Kuehling at amd.com>
>
> Reviewed-by: Christian König <christian.koenig at amd.com>

I work on this on Alex's rebased amd-staging-drm-next. Should this go
into any other branches?

Thanks,
  Felix


>
>> ---
>>   drivers/gpu/drm/ttm/ttm_bo.c | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
>> index 3a10bebb75d6..de1ec838cf8b 100644
>> --- a/drivers/gpu/drm/ttm/ttm_bo.c
>> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
>> @@ -730,8 +730,9 @@ static int ttm_bo_add_move_fence(struct
>> ttm_buffer_object *bo,
>>           return 0;
>>         if (no_wait_gpu) {
>> +        ret = dma_fence_is_signaled(fence) ? 0 : -EBUSY;
>>           dma_fence_put(fence);
>> -        return -EBUSY;
>> +        return ret;
>>       }
>>         dma_resv_add_shared_fence(bo->base.resv, fence);
>