[Mesa-dev] [PATCH] radv: reset semaphores & fences on sync_file export.

[Bas Nieuwenhuizen]

Per spec:

"Additionally, exporting a fence payload to a handle with copy transference has the same side effects
on the source fence’s payload as executing a fence reset operation. If the fence was using a
temporarily imported payload, the fence’s prior permanent payload will be restored."

And similar for semaphores:

"Additionally, exporting a semaphore payload to a handle with copy transference has the same side
effects on the source semaphore’s payload as executing a semaphore wait operation. If the
semaphore was using a temporarily imported payload, the semaphore’s prior permanent payload
will be restored."

Fixes: 42bc25a79c "radv: Advertise sync fd import and export."
---
 src/amd/vulkan/radv_device.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index cbf8f5cf49..716a880fa8 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -3801,6 +3801,14 @@ VkResult radv_GetSemaphoreFdKHR(VkDevice _device,
 		break;
 	case VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT_KHR:
 		ret = device->ws->export_syncobj_to_sync_file(device->ws, syncobj_handle, pFd);
+		if (!ret) {
+			if (sem->temp_syncobj) {
+				close (sem->temp_syncobj);
+				sem->temp_syncobj = 0;
+			} else {
+				device->ws->reset_syncobj(device->ws, syncobj_handle);
+			}
+		}
 		break;
 	default:
 		unreachable("Unhandled semaphore handle type");
@@ -3882,6 +3890,14 @@ VkResult radv_GetFenceFdKHR(VkDevice _device,
 		break;
 	case VK_EXTERNAL_FENCE_HANDLE_TYPE_SYNC_FD_BIT_KHR:
 		ret = device->ws->export_syncobj_to_sync_file(device->ws, syncobj_handle, pFd);
+		if (!ret) {
+			if (fence->temp_syncobj) {
+				close (fence->temp_syncobj);
+				fence->temp_syncobj = 0;
+			} else {
+				device->ws->reset_syncobj(device->ws, syncobj_handle);
+			}
+		}
 		break;
 	default:
 		unreachable("Unhandled fence handle type");
-- 
2.15.1