From 78dbbec8914e57b37039fcad9dd41a7d94da598a Mon Sep 17 00:00:00 2001
From: Jakob Bornecrantz <jakob@collabora.com>
Date: Mon, 15 Feb 2021 15:33:41 +0000
Subject: [PATCH] st/prober: Improve xrt_prober_destroy

---
 src/xrt/include/xrt/xrt_prober.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/xrt/include/xrt/xrt_prober.h b/src/xrt/include/xrt/xrt_prober.h
index d0410158b..8e3169a85 100644
--- a/src/xrt/include/xrt/xrt_prober.h
+++ b/src/xrt/include/xrt/xrt_prober.h
@@ -361,7 +361,8 @@ xrt_prober_list_video_devices(struct xrt_prober *xp, xrt_prober_list_video_cb cb
 /*!
  * @copydoc xrt_prober::destroy
  *
- * Helper function for @ref xrt_prober::destroy.
+ * Helper for calling through the function pointer: does a null check and sets
+ * xp_ptr to null if freed.
  *
  * @public @memberof xrt_prober
  */
@@ -374,6 +375,7 @@ xrt_prober_destroy(struct xrt_prober **xp_ptr)
 	}
 
 	xp->destroy(xp_ptr);
+	*xp_ptr = NULL;
 }
 
 /*!