Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "I didn't want these to wait for stable cycle.

  The nouveau and radeon ones are the same problem, where the runtime pm
  stuff broke non-runtime pm managed secondary GPUs.

  The udl fix is for an oops on unplug, and the i915 fix is for a
  regression on Sandybridge even though it may break haswell (regression
  wins)"

Daniel Vetter comments:
 "My apologies for the i915 regression fumble, that thing somehow fell
  through the cracks here for almost half a year :( Imo that's more than
  enough flailing to just go ahead with the revert, and the re-broken
  hsw should get peoples attention ..."

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/i915: Undo gtt scratch pte unmapping again
  drm/radeon: fix runtime suspend breaking secondary GPUs
  drm/nouveau: fail runtime pm properly.
  drm/udl: take reference to device struct for dma-bufs

drivers/gpu/drm/i915/i915_gem_gtt.c

@@ -842,7 +842,7 @@ void i915_gem_suspend_gtt_mappings(struct drm_device *dev)
 	dev_priv->gtt.base.clear_range(&dev_priv->gtt.base,
 				       dev_priv->gtt.base.start / PAGE_SIZE,
 				       dev_priv->gtt.base.total / PAGE_SIZE,
-				       false);
+				       true);
 }
 
 void i915_gem_restore_gtt_mappings(struct drm_device *dev)

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -866,13 +866,16 @@ static int nouveau_pmops_runtime_suspend(struct device *dev)
 	struct drm_device *drm_dev = pci_get_drvdata(pdev);
 	int ret;
 
-	if (nouveau_runtime_pm == 0)
-		return -EINVAL;
+	if (nouveau_runtime_pm == 0) {
+		pm_runtime_forbid(dev);
+		return -EBUSY;
+	}
 
 	/* are we optimus enabled? */
 	if (nouveau_runtime_pm == -1 && !nouveau_is_optimus() && !nouveau_is_v1_dsm()) {
 		DRM_DEBUG_DRIVER("failing to power off - not optimus\n");
-		return -EINVAL;
+		pm_runtime_forbid(dev);
+		return -EBUSY;
 	}
 
 	nv_debug_level(SILENT);
@@ -923,12 +926,15 @@ static int nouveau_pmops_runtime_idle(struct device *dev)
 	struct nouveau_drm *drm = nouveau_drm(drm_dev);
 	struct drm_crtc *crtc;
 
-	if (nouveau_runtime_pm == 0)
+	if (nouveau_runtime_pm == 0) {
+		pm_runtime_forbid(dev);
 		return -EBUSY;
+	}
 
 	/* are we optimus enabled? */
 	if (nouveau_runtime_pm == -1 && !nouveau_is_optimus() && !nouveau_is_v1_dsm()) {
 		DRM_DEBUG_DRIVER("failing to power off - not optimus\n");
+		pm_runtime_forbid(dev);
 		return -EBUSY;
 	}
 

drivers/gpu/drm/radeon/radeon_drv.c

@@ -403,11 +403,15 @@ static int radeon_pmops_runtime_suspend(struct device *dev)
 	struct drm_device *drm_dev = pci_get_drvdata(pdev);
 	int ret;
 
-	if (radeon_runtime_pm == 0)
-		return -EINVAL;
+	if (radeon_runtime_pm == 0) {
+		pm_runtime_forbid(dev);
+		return -EBUSY;
+	}
 
-	if (radeon_runtime_pm == -1 && !radeon_is_px())
-		return -EINVAL;
+	if (radeon_runtime_pm == -1 && !radeon_is_px()) {
+		pm_runtime_forbid(dev);
+		return -EBUSY;
+	}
 
 	drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 	drm_kms_helper_poll_disable(drm_dev);
@@ -456,12 +460,15 @@ static int radeon_pmops_runtime_idle(struct device *dev)
 	struct drm_device *drm_dev = pci_get_drvdata(pdev);
 	struct drm_crtc *crtc;
 
-	if (radeon_runtime_pm == 0)
+	if (radeon_runtime_pm == 0) {
+		pm_runtime_forbid(dev);
 		return -EBUSY;
+	}
 
 	/* are we PX enabled? */
 	if (radeon_runtime_pm == -1 && !radeon_is_px()) {
 		DRM_DEBUG_DRIVER("failing to power off - not px\n");
+		pm_runtime_forbid(dev);
 		return -EBUSY;
 	}
 

drivers/gpu/drm/udl/udl_gem.c

@@ -177,8 +177,10 @@ void udl_gem_free_object(struct drm_gem_object *gem_obj)
 	if (obj->vmapping)
 		udl_gem_vunmap(obj);
 
-	if (gem_obj->import_attach)
+	if (gem_obj->import_attach) {
 		drm_prime_gem_destroy(gem_obj, obj->sg);
+		put_device(gem_obj->dev->dev);
+	}
 
 	if (obj->pages)
 		udl_gem_put_pages(obj);
@@ -256,9 +258,12 @@ struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 	int ret;
 
 	/* need to attach */
+	get_device(dev->dev);
 	attach = dma_buf_attach(dma_buf, dev->dev);
-	if (IS_ERR(attach))
+	if (IS_ERR(attach)) {
+		put_device(dev->dev);
 		return ERR_CAST(attach);
+	}
 
 	get_dma_buf(dma_buf);
 
@@ -282,6 +287,6 @@ struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
 fail_detach:
 	dma_buf_detach(dma_buf, attach);
 	dma_buf_put(dma_buf);
-
+	put_device(dev->dev);
 	return ERR_PTR(ret);
 }