Fix must-check warnings and implement a few error paths.

3 files changed, 43 insertions, 16 deletions

diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index d5eb9713..6bbe7fca 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -311,7 +311,7 @@ int drm_init(struct drm_driver *driver,
 	}
 
 	if (!drm_fb_loaded)
-		pci_register_driver(&driver->pci_driver);
+		return pci_register_driver(&driver->pci_driver);
 	else {
 		for (i = 0; pciidlist[i].vendor != 0; i++) {
 			pid = &pciidlist[i];
diff --git a/linux-core/drm_stub.c b/linux-core/drm_stub.c
index f57ed9cc..b96408ab 100644
--- a/linux-core/drm_stub.c
+++ b/linux-core/drm_stub.c
@@ -232,18 +232,22 @@ int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
 
 	if (!drm_fb_loaded) {
 		pci_set_drvdata(pdev, dev);
-		pci_request_regions(pdev, driver->pci_driver.name);
+		ret = pci_request_regions(pdev, driver->pci_driver.name);
+		if (ret)
+			goto err_g1;
 	}
 
-	pci_enable_device(pdev);
+	ret = pci_enable_device(pdev);
+	if (ret)
+		goto err_g2;
 	pci_set_master(pdev);
 
 	if ((ret = drm_fill_in_dev(dev, pdev, ent, driver))) {
 		printk(KERN_ERR "DRM: fill_in_dev failed\n");
-		goto err_g1;
+		goto err_g3;
 	}
 	if ((ret = drm_get_head(dev, &dev->primary)))
-		goto err_g1;
+		goto err_g3;
 
 	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
 		 driver->name, driver->major, driver->minor, driver->patchlevel,
@@ -251,12 +255,16 @@ int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
 
 	return 0;
 
-err_g1:
-	if (!drm_fb_loaded) {
-		pci_set_drvdata(pdev, NULL);
-		pci_release_regions(pdev);
+ err_g3:
+	if (!drm_fb_loaded)
 		pci_disable_device(pdev);
-	}
+ err_g2:
+	if (!drm_fb_loaded)
+		pci_release_regions(pdev);
+ err_g1:
+	if (!drm_fb_loaded)
+		pci_set_drvdata(pdev, NULL);
+
 	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
 	printk(KERN_ERR "DRM: drm_get_dev failed.\n");
 	return ret;
diff --git a/linux-core/drm_sysfs.c b/linux-core/drm_sysfs.c
index ace0778b..9b2f5dce 100644
--- a/linux-core/drm_sysfs.c
+++ b/linux-core/drm_sysfs.c
@@ -93,11 +93,15 @@ struct drm_sysfs_class *drm_sysfs_create(struct module *owner, char *name)
 	retval = class_register(&cs->class);
 	if (retval)
 		goto error;
-	class_create_file(&cs->class, &class_attr_version);
+	retval = class_create_file(&cs->class, &class_attr_version);
+	if (retval)
+		goto error_with_class;
 
 	return cs;
 
-      error:
+ error_with_class:
+	class_unregister(&cs->class);
+ error:
 	kfree(cs);
 	return ERR_PTR(retval);
 }
@@ -170,16 +174,31 @@ struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs,
 	if (retval)
 		goto error;
 
-	class_device_create_file(&s_dev->class_dev, &cs->attr);
+	retval = class_device_create_file(&s_dev->class_dev, &cs->attr);
+	if (retval)
+		goto error_with_device;
+
 	class_set_devdata(&s_dev->class_dev, head);
 
-	for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
-		class_device_create_file(&s_dev->class_dev, &class_device_attrs[i]);
+	for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
+		retval = class_device_create_file(&s_dev->class_dev,
+						  &class_device_attrs[i]);
+		if (retval)
+			goto error_with_files;
+	}
 
 	return &s_dev->class_dev;
 
-error:
+ error_with_files:
+	while (i > 0)
+		class_device_remove_file(&s_dev->class_dev,
+					 &class_device_attrs[--i]);
+	class_device_remove_file(&s_dev->class_dev, &cs->attr);
+ error_with_device:
+	class_device_unregister(&s_dev->class_dev);
+ error:
 	kfree(s_dev);
+
 	return ERR_PTR(retval);
 }