From 89c914608921cd9f7b67990634e1826074aae704 Mon Sep 17 00:00:00 2001
From: chl <chl@openbsd.org>
Date: Mon, 1 Sep 2008 17:50:15 +0000
Subject: [PATCH] fix null dereference.

initial patch from me, reworked by oga@.

found by LLVM/Clang Static Analyzer.

ok oga@
---
 sys/dev/pci/drm/drm_memory.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sys/dev/pci/drm/drm_memory.c b/sys/dev/pci/drm/drm_memory.c
index 81dc4a10e98..a1eba523d7b 100644
--- a/sys/dev/pci/drm/drm_memory.c
+++ b/sys/dev/pci/drm/drm_memory.c
@@ -136,7 +136,10 @@ done:
 void
 drm_ioremapfree(drm_local_map_t *map)
 {
-	if (map != NULL && map->bsr != NULL)
+	if (map == NULL)
+		return;
+
+	if (map->bsr != NULL)
 		vga_pci_bar_unmap(map->bsr);
 	else
 		bus_space_unmap(map->bst, map->bsh, map->size);
-- 
2.20.1