drm: ioremap return value checks

Signed-off-by: Scott Thompson <postfail <at> hushmail.com> Signed-off-by: Dave Airlie <airlied@linux.ie>
mariux64 · Aug 25, 2007 · 0769d39 · 0769d39
1 parent 22c806c
commit 0769d39
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/drivers/char/drm/drm_bufs.c b/drivers/char/drm/drm_bufs.c
@@ -177,8 +177,14 @@ static int drm_addmap_core(struct drm_device * dev, unsigned int offset,
 						     MTRR_TYPE_WRCOMB, 1);
 			}
 		}
-		if (map->type == _DRM_REGISTERS)
+		if (map->type == _DRM_REGISTERS) {
 			map->handle = ioremap(map->offset, map->size);
+			if (!map->handle) {
+				drm_free(map, sizeof(*map), DRM_MEM_MAPS);
+				return -ENOMEM;
+			}
+		}
+
 		break;
 	case _DRM_SHM:
 		list = drm_find_matching_map(dev, map);