4 files changed, 21 insertions, 24 deletions

diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
index 93405264ff23..18623ba666e3 100644
--- a/samples/vfio-mdev/mbochs.c
+++ b/samples/vfio-mdev/mbochs.c
@@ -88,6 +88,7 @@
 #define STORE_LE32(addr, val)	(*(u32 *)addr = val)
 
 
+MODULE_DESCRIPTION("Mediated virtual PCI display host device driver");
 MODULE_LICENSE("GPL v2");
 
 static int max_mbytes = 256;
@@ -133,7 +134,9 @@ static struct mdev_type *mbochs_mdev_types[] = {
 };
 
 static dev_t		mbochs_devt;
-static struct class	*mbochs_class;
+static const struct class mbochs_class = {
+	.name = MBOCHS_CLASS_NAME,
+};
 static struct cdev	mbochs_cdev;
 static struct device	mbochs_dev;
 static struct mdev_parent mbochs_parent;
@@ -1422,13 +1425,10 @@ static int __init mbochs_dev_init(void)
 	if (ret)
 		goto err_cdev;
 
-	mbochs_class = class_create(MBOCHS_CLASS_NAME);
-	if (IS_ERR(mbochs_class)) {
-		pr_err("Error: failed to register mbochs_dev class\n");
-		ret = PTR_ERR(mbochs_class);
+	ret = class_register(&mbochs_class);
+	if (ret)
 		goto err_driver;
-	}
-	mbochs_dev.class = mbochs_class;
+	mbochs_dev.class = &mbochs_class;
 	mbochs_dev.release = mbochs_device_release;
 	dev_set_name(&mbochs_dev, "%s", MBOCHS_NAME);
 
@@ -1448,7 +1448,7 @@ err_device:
 	device_del(&mbochs_dev);
 err_put:
 	put_device(&mbochs_dev);
-	class_destroy(mbochs_class);
+	class_unregister(&mbochs_class);
 err_driver:
 	mdev_unregister_driver(&mbochs_driver);
 err_cdev:
@@ -1466,10 +1466,9 @@ static void __exit mbochs_dev_exit(void)
 	mdev_unregister_driver(&mbochs_driver);
 	cdev_del(&mbochs_cdev);
 	unregister_chrdev_region(mbochs_devt, MINORMASK + 1);
-	class_destroy(mbochs_class);
-	mbochs_class = NULL;
+	class_unregister(&mbochs_class);
 }
 
-MODULE_IMPORT_NS(DMA_BUF);
+MODULE_IMPORT_NS("DMA_BUF");
 module_init(mbochs_dev_init)
 module_exit(mbochs_dev_exit)
diff --git a/samples/vfio-mdev/mdpy-fb.c b/samples/vfio-mdev/mdpy-fb.c
index 4598bc28acd9..149af7f598f8 100644
--- a/samples/vfio-mdev/mdpy-fb.c
+++ b/samples/vfio-mdev/mdpy-fb.c
@@ -229,4 +229,5 @@ static int __init mdpy_fb_init(void)
 module_init(mdpy_fb_init);
 
 MODULE_DEVICE_TABLE(pci, mdpy_fb_pci_table);
+MODULE_DESCRIPTION("Framebuffer driver for mdpy (mediated virtual pci display device)");
 MODULE_LICENSE("GPL v2");
diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c
index 72ea5832c927..8104831ae125 100644
--- a/samples/vfio-mdev/mdpy.c
+++ b/samples/vfio-mdev/mdpy.c
@@ -40,6 +40,7 @@
 #define STORE_LE32(addr, val)	(*(u32 *)addr = val)
 
 
+MODULE_DESCRIPTION("Mediated virtual PCI display host device driver");
 MODULE_LICENSE("GPL v2");
 
 #define MDPY_TYPE_1 "vga"
@@ -84,7 +85,9 @@ static struct mdev_type *mdpy_mdev_types[] = {
 };
 
 static dev_t		mdpy_devt;
-static struct class	*mdpy_class;
+static const struct class mdpy_class = {
+	.name = MDPY_CLASS_NAME,
+};
 static struct cdev	mdpy_cdev;
 static struct device	mdpy_dev;
 static struct mdev_parent mdpy_parent;
@@ -709,13 +712,10 @@ static int __init mdpy_dev_init(void)
 	if (ret)
 		goto err_cdev;
 
-	mdpy_class = class_create(MDPY_CLASS_NAME);
-	if (IS_ERR(mdpy_class)) {
-		pr_err("Error: failed to register mdpy_dev class\n");
-		ret = PTR_ERR(mdpy_class);
+	ret = class_register(&mdpy_class);
+	if (ret)
 		goto err_driver;
-	}
-	mdpy_dev.class = mdpy_class;
+	mdpy_dev.class = &mdpy_class;
 	mdpy_dev.release = mdpy_device_release;
 	dev_set_name(&mdpy_dev, "%s", MDPY_NAME);
 
@@ -735,7 +735,7 @@ err_device:
 	device_del(&mdpy_dev);
 err_put:
 	put_device(&mdpy_dev);
-	class_destroy(mdpy_class);
+	class_unregister(&mdpy_class);
 err_driver:
 	mdev_unregister_driver(&mdpy_driver);
 err_cdev:
@@ -753,8 +753,7 @@ static void __exit mdpy_dev_exit(void)
 	mdev_unregister_driver(&mdpy_driver);
 	cdev_del(&mdpy_cdev);
 	unregister_chrdev_region(mdpy_devt, MINORMASK + 1);
-	class_destroy(mdpy_class);
-	mdpy_class = NULL;
+	class_unregister(&mdpy_class);
 }
 
 module_param_named(count, mdpy_driver.max_instances, int, 0444);
diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index 2284b3751240..59eefe2fed10 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -927,7 +927,6 @@ static const struct file_operations mtty_save_fops = {
 	.unlocked_ioctl = mtty_precopy_ioctl,
 	.compat_ioctl = compat_ptr_ioctl,
 	.release = mtty_release_migf,
-	.llseek = no_llseek,
 };
 
 static void mtty_save_state(struct mdev_state *mdev_state)
@@ -1082,7 +1081,6 @@ static const struct file_operations mtty_resume_fops = {
 	.owner = THIS_MODULE,
 	.write = mtty_resume_write,
 	.release = mtty_release_migf,
-	.llseek = no_llseek,
 };
 
 static struct mtty_migration_file *
@@ -2058,6 +2056,6 @@ module_init(mtty_dev_init)
 module_exit(mtty_dev_exit)
 
 MODULE_LICENSE("GPL v2");
-MODULE_INFO(supported, "Test driver that simulate serial port over PCI");
+MODULE_DESCRIPTION("Test driver that simulate serial port over PCI");
 MODULE_VERSION(VERSION_STRING);
 MODULE_AUTHOR(DRIVER_AUTHOR);