wfdevent: dup the drm fd

1 files changed, 13 insertions, 4 deletions

diff --git a/src/wfdevent.c b/src/wfdevent.c
index e0150ed..e0abf27 100644
--- a/src/wfdevent.c
+++ b/src/wfdevent.c
@@ -46,6 +46,7 @@ struct wfd_event {
 	struct wfd_device *device;
 
 	/* source bind complete */
+	int drm_fd;
 	WFDint pipeline_id;
 
 	/* port attach */
@@ -63,6 +64,7 @@ wfd_event_destroy(struct wfd_device *device,
 		  struct wfd_event *event)
 {
 	g_queue_free(event->bind_event_queue);
+	close(event->drm_fd);
 	udev_monitor_unref(event->udev_monitor);
 	close(event->epoll_fd);
 	free(event);
@@ -113,12 +115,20 @@ wfd_create_event(struct wfd_device *device,
 
 	memset(&ep, 0, sizeof ep);
 	ep.events = EPOLLIN;
-	ep.data.fd = wfd_device_get_fd(device);
+	event->drm_fd = dup(wfd_device_get_fd(device));
+	if (event->drm_fd < 0) {
+		fprintf(stderr, "failed to dup drm fd: %m\n");
+		close(event->epoll_fd);
+		free(event);
+		return NULL;
+	}
+	ep.data.fd = event->drm_fd;
 	ret = epoll_ctl(event->epoll_fd, EPOLL_CTL_ADD,
 			ep.data.fd, &ep);
 	if (ret == -1) {
 		fprintf(stderr, "failed to add fd to epoll: %m\n");
 		close(event->epoll_fd);
+		close(event->drm_fd);
 		free(event);
 		return NULL;
 	}
@@ -234,7 +244,6 @@ wfd_event_wait(struct wfd_device *device,
 	WFDEventType event_type = WFD_EVENT_NONE;
 	int num;
 	int timeout;
-	int drm_fd = wfd_device_get_fd(device);
 
 	timeout = time / 1e6;
 
@@ -256,7 +265,7 @@ wfd_event_wait(struct wfd_device *device,
 			(uintptr_t) g_queue_pop_head(event->bind_event_queue);
 
 		event_type = WFD_EVENT_PIPELINE_BIND_SOURCE_COMPLETE;
-	} else if (ep.data.fd == drm_fd) {
+	} else if (ep.data.fd == event->drm_fd) {
 		drmEventContext drm_evctx;
 
 		memset(&drm_evctx, 0, sizeof drm_evctx);
@@ -264,7 +273,7 @@ wfd_event_wait(struct wfd_device *device,
 		drm_evctx.page_flip_handler = page_flip_handler;
 
 		flip_pipeline_id = 0;
-		drmHandleEvent(drm_fd, &drm_evctx);
+		drmHandleEvent(event->drm_fd, &drm_evctx);
 		if (flip_pipeline_id != 0) {
 			event->pipeline_id = flip_pipeline_id;
 			event_type = WFD_EVENT_PIPELINE_BIND_SOURCE_COMPLETE;