[PATCH 2/5] drm/syncobj: add sync obj wait interface. (v2)

[Chris Wilson]

On Fri, May 12, 2017 at 10:34:54AM +1000, Dave Airlie wrote:
> +static int drm_syncobj_wait_all_fences(struct drm_device *dev,
> +				       struct drm_file *file_private,
> +				       struct drm_syncobj_wait *wait,
> +				       uint32_t *handles)
> +{
> +	uint32_t i;
> +	int ret = 0;
> +	unsigned long timeout = nsecs_to_jiffies(wait->timeout_ns);
> +
> +	for (i = 0; i < wait->count_handles; i++) {
> +		struct dma_fence *fence;
> +
> +		ret = drm_syncobj_fence_get(file_private, handles[i],
> +					    &fence);
> +		if (ret)
> +			return ret;
> +
> +		if (!fence)
> +			continue;
> +
> +		ret = dma_fence_wait_timeout(fence, true, timeout);

Doesn't handle -EINTR yet with timeout. If having a drmIoctl() that
can't be tricked into turning a short waiting into an indefinite one is a
goal.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre