[patch] nouveau: unwind on load errors

[Dan Carpenter]

nouveau_load() just returned directly if there was an error instead of
releasing resources.

Signed-off-by: Dan Carpenter <error27 at gmail.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index e632339..e53253a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -688,10 +688,13 @@ int nouveau_load(struct drm_device *dev, unsigned long flags)
 	struct drm_nouveau_private *dev_priv;
 	uint32_t reg0;
 	resource_size_t mmio_start_offs;
+	int ret;
 
 	dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
-	if (!dev_priv)
-		return -ENOMEM;
+	if (!dev_priv) {
+		ret = -ENOMEM;
+		goto err_out;
+	}
 	dev->dev_private = dev_priv;
 	dev_priv->dev = dev;
 
@@ -702,8 +705,10 @@ int nouveau_load(struct drm_device *dev, unsigned long flags)
 		 dev->pci_vendor, dev->pci_device, dev->pdev->class);
 
 	dev_priv->wq = create_workqueue("nouveau");
-	if (!dev_priv->wq)
-		return -EINVAL;
+	if (!dev_priv->wq) {
+		ret = -EINVAL;
+		goto err_priv;
+	}
 
 	/* resource 0 is mmio regs */
 	/* resource 1 is linear FB */
@@ -716,7 +721,8 @@ int nouveau_load(struct drm_device *dev, unsigned long flags)
 	if (!dev_priv->mmio) {
 		NV_ERROR(dev, "Unable to initialize the mmio mapping. "
 			 "Please report your setup to " DRIVER_EMAIL "\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto err_wq;
 	}
 	NV_DEBUG(dev, "regs mapped ok at 0x%llx\n",
 					(unsigned long long)mmio_start_offs);
@@ -764,16 +770,17 @@ int nouveau_load(struct drm_device *dev, unsigned long flags)
 		break;
 	default:
 		NV_INFO(dev, "Unsupported chipset 0x%08x\n", reg0);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto err_mmio;
 	}
 
 	NV_INFO(dev, "Detected an NV%2x generation card (0x%08x)\n",
 		dev_priv->card_type, reg0);
 
 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
-		int ret = nouveau_remove_conflicting_drivers(dev);
+		ret = nouveau_remove_conflicting_drivers(dev);
 		if (ret)
-			return ret;
+			goto err_mmio;
 	}
 
 	/* map larger RAMIN aperture on NV40 cards */
@@ -801,7 +808,8 @@ int nouveau_load(struct drm_device *dev, unsigned long flags)
 							dev_priv->ramin_size);
 		if (!dev_priv->ramin) {
 			NV_ERROR(dev, "Failed to map BAR0 PRAMIN.\n");
-			return -ENOMEM;
+			ret = -ENOMEM;
+			goto err_mmio;
 		}
 	}
 
@@ -815,12 +823,24 @@ int nouveau_load(struct drm_device *dev, unsigned long flags)
 
 	/* For kernel modesetting, init card now and bring up fbcon */
 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
-		int ret = nouveau_card_init(dev);
+		ret = nouveau_card_init(dev);
 		if (ret)
-			return ret;
+			goto err_ramin;
 	}
 
 	return 0;
+
+err_ramin:
+	iounmap(dev_priv->ramin);
+err_mmio:
+	iounmap(dev_priv->mmio);
+err_wq:
+	destroy_workqueue(dev_priv->wq);
+err_priv:
+	kfree(dev_priv);
+	dev->dev_private = NULL;
+err_out:
+	return ret;
 }
 
 static void nouveau_close(struct drm_device *dev)