From 1fd9936f95966d268686d4b2bb5cd91db1590b79 Mon Sep 17 00:00:00 2001
From: Ryan Pavlik <ryan.pavlik@collabora.com>
Date: Wed, 5 Jun 2019 14:14:18 -0500
Subject: [PATCH] st/oxr: Fix enumerating swapchain formats on headless

---
 src/xrt/state_trackers/oxr/oxr_session.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/xrt/state_trackers/oxr/oxr_session.c b/src/xrt/state_trackers/oxr/oxr_session.c
index abeb9fb23..d120416ae 100644
--- a/src/xrt/state_trackers/oxr/oxr_session.c
+++ b/src/xrt/state_trackers/oxr/oxr_session.c
@@ -62,6 +62,10 @@ oxr_session_enumerate_formats(struct oxr_logger *log,
                               int64_t *formats)
 {
 	struct xrt_compositor *xc = sess->compositor;
+	if (formatCountOutput == NULL) {
+		return oxr_error(log, XR_ERROR_VALIDATION_FAILURE,
+		                 "(formatCountOutput)");
+	}
 	if (xc == NULL) {
 		if (formatCountOutput != NULL) {
 			*formatCountOutput = 0;