Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6

* 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm: ioremap return value checks
  drm/via: Fix dmablit when blit queue is full
  drm_rmmap_ioctl(): remove dead code

2 files changed, 8 insertions, 7 deletions

diff --git a/drivers/char/drm/drm_bufs.c b/drivers/char/drm/drm_bufs.c
index 923174c..c115b39 100644
--- 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);
@@ -479,11 +485,6 @@ int drm_rmmap_ioctl(struct inode *inode, struct file *filp,
 		return -EINVAL;
 	}
 
-	if (!map) {
-		mutex_unlock(&dev->struct_mutex);
-		return -EINVAL;
-	}
-
 	/* Register and framebuffer maps are permanent */
 	if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) {
 		mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/char/drm/via_dmablit.c b/drivers/char/drm/via_dmablit.c
index 832de1d..3dd1ed3 100644
--- a/drivers/char/drm/via_dmablit.c
+++ b/drivers/char/drm/via_dmablit.c
@@ -560,7 +560,7 @@ via_init_dmablit(struct drm_device *dev)
 		blitq->head = 0;
 		blitq->cur = 0;
 		blitq->serviced = 0;
-		blitq->num_free = VIA_NUM_BLIT_SLOTS;
+		blitq->num_free = VIA_NUM_BLIT_SLOTS - 1;
 		blitq->num_outstanding = 0;
 		blitq->is_active = 0;
 		blitq->aborting = 0;