drm: ioremap return value checks

Signed-off-by: Scott Thompson <postfail <at> hushmail.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

diff --git a/drivers/char/drm/drm_bufs.c b/drivers/char/drm/drm_bufs.c
index 3d1ec8234b8b5fb549b8f39e9fb270b787294066..c115b39b85178cc4d84fd9d9b55f5521ccb6d7c5 100644 (file)
--- 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);