1 files changed, 17 insertions, 16 deletions

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index a000cf028826..0ccb63ee50ee 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -713,18 +713,18 @@ static int i915_cmdbuffer(struct drm_device *dev, void *data,
 	mutex_unlock(&dev->struct_mutex);
 	if (ret) {
 		DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
-		goto fail_batch_free;
+		goto fail_clip_free;
 	}
 
 	if (sarea_priv)
 		sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 
-fail_batch_free:
-	drm_free(batch_data, cmdbuf->sz, DRM_MEM_DRIVER);
 fail_clip_free:
 	drm_free(cliprects,
 		 cmdbuf->num_cliprects * sizeof(struct drm_clip_rect),
 		 DRM_MEM_DRIVER);
+fail_batch_free:
+	drm_free(batch_data, cmdbuf->sz, DRM_MEM_DRIVER);
 
 	return ret;
 }
@@ -987,12 +987,6 @@ static int i915_load_modeset_init(struct drm_device *dev)
 	int fb_bar = IS_I9XX(dev) ? 2 : 0;
 	int ret = 0;
 
-	dev->devname = kstrdup(DRIVER_NAME, GFP_KERNEL);
-	if (!dev->devname) {
-		ret = -ENOMEM;
-		goto out;
-	}
-
 	dev->mode_config.fb_base = drm_get_resource_start(dev, fb_bar) &
 		0xff000000;
 
@@ -1006,17 +1000,25 @@ static int i915_load_modeset_init(struct drm_device *dev)
 
 	ret = i915_probe_agp(dev, &agp_size, &prealloc_size);
 	if (ret)
-		goto kfree_devname;
+		goto out;
 
 	/* Basic memrange allocator for stolen space (aka vram) */
 	drm_mm_init(&dev_priv->vram, 0, prealloc_size);
 
-	/* Let GEM Manage from end of prealloc space to end of aperture */
-	i915_gem_do_init(dev, prealloc_size, agp_size);
+	/* Let GEM Manage from end of prealloc space to end of aperture.
+	 *
+	 * However, leave one page at the end still bound to the scratch page.
+	 * There are a number of places where the hardware apparently
+	 * prefetches past the end of the object, and we've seen multiple
+	 * hangs with the GPU head pointer stuck in a batchbuffer bound
+	 * at the last page of the aperture.  One page should be enough to
+	 * keep any prefetching inside of the aperture.
+	 */
+	i915_gem_do_init(dev, prealloc_size, agp_size - 4096);
 
 	ret = i915_gem_init_ringbuffer(dev);
 	if (ret)
-		goto kfree_devname;
+		goto out;
 
 	/* Allow hardware batchbuffers unless told otherwise.
 	 */
@@ -1048,8 +1050,6 @@ static int i915_load_modeset_init(struct drm_device *dev)
 
 destroy_ringbuffer:
 	i915_gem_cleanup_ringbuffer(dev);
-kfree_devname:
-	kfree(dev->devname);
 out:
 	return ret;
 }
@@ -1232,7 +1232,7 @@ int i915_driver_unload(struct drm_device *dev)
 	if (dev_priv->regs != NULL)
 		iounmap(dev_priv->regs);
 
-	intel_opregion_free(dev);
+	intel_opregion_free(dev, 0);
 
 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 		intel_modeset_cleanup(dev);
@@ -1350,6 +1350,7 @@ struct drm_ioctl_desc i915_ioctls[] = {
 	DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, 0),
 	DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0),
 	DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, 0),
+	DRM_IOCTL_DEF(DRM_I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, 0),
 };
 
 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);