void dma_fence_release()

in dma-fence.c [520:552]

• 22 lines of code
• 4 McCabe index (conditional complexity)

void dma_fence_release(struct kref *kref)
{
	struct dma_fence *fence =
		container_of(kref, struct dma_fence, refcount);

	trace_dma_fence_destroy(fence);

	if (WARN(!list_empty(&fence->cb_list) &&
		 !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags),
		 "Fence %s:%s:%llx:%llx released with pending signals!\n",
		 fence->ops->get_driver_name(fence),
		 fence->ops->get_timeline_name(fence),
		 fence->context, fence->seqno)) {
		unsigned long flags;

		/*
		 * Failed to signal before release, likely a refcounting issue.
		 *
		 * This should never happen, but if it does make sure that we
		 * don't leave chains dangling. We set the error flag first
		 * so that the callbacks know this signal is due to an error.
		 */
		spin_lock_irqsave(fence->lock, flags);
		fence->error = -EDEADLK;
		dma_fence_signal_locked(fence);
		spin_unlock_irqrestore(fence->lock, flags);
	}

	if (fence->ops->release)
		fence->ops->release(fence);
	else
		dma_fence_free(fence);
}