[PATCH] drm/vmwgfx: reserve fence slots on new resources

[Christian König]

Am 22.04.22 um 11:20 schrieb Christian König:
> When resources are allocated dynamically during an IOCTL we need to make sure
> that a fence slot is reserved so that the resulting fence can be added in the
> end.

I should probably add that this is only compile tested.

Zack you should probably give it a try for your issue.

Thanks for the help and sorry for the noise,
Christian.

>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> Fixes: c8d4c18bfbc4 ("dma-buf/drivers: make reserving a shared slot mandatory v4")
> ---
>   drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 4 ++++
>   1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
> index a7d62a4eb47b..edce228f737c 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
> @@ -399,6 +399,10 @@ static int vmw_resource_do_validate(struct vmw_resource *res,
>   		ret = func->create(res);
>   		if (unlikely(ret != 0))
>   			return ret;
> +
> +		ret = dma_resv_reserve_fences(res->backup->base.base.resv, 1);
> +		if (unlikely(ret))
> +			goto out_bind_failed;
>   	}
>   
>   	if (func->bind &&