[Intel-gfx] [PATCH 1/2] dma-buf/sync-file: fix logic error in new fence merge code

[Das, Nirmoy]

I finally managed to find a machine and tested this series. If it is not 
too late

The series is Tested-by: Nirmoy Das <nirmoy.das at intel.com>

On 3/29/2022 9:00 AM, Christian König wrote:
> When the array is empty because everything is signaled we can't use
> add_fence() to add something because that would filter the signaled
> fence again.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> Fixes: 519f490db07e ("dma-buf/sync-file: fix warning about fence containers")
> ---
>   drivers/dma-buf/sync_file.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
> index b8dea4ec123b..514d213261df 100644
> --- a/drivers/dma-buf/sync_file.c
> +++ b/drivers/dma-buf/sync_file.c
> @@ -262,7 +262,7 @@ static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
>   	}
>   
>   	if (index == 0)
> -		add_fence(fences, &index, dma_fence_get_stub());
> +		fences[index++] = dma_fence_get_stub();
>   
>   	if (num_fences > index) {
>   		struct dma_fence **tmp;