[patch] vfio-mdev: fix some error codes in the sample code

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This is just sample code.  We forget to set the error codes in a couple
places.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c
index 6b633a4..40ed3c0 100644
--- a/samples/vfio-mdev/mtty.c
+++ b/samples/vfio-mdev/mtty.c
@@ -1447,6 +1447,7 @@ static int __init mtty_dev_init(void)
 
 	if (IS_ERR(mtty_dev.vd_class)) {
 		pr_err("Error: failed to register mtty_dev class\n");
+		ret = PTR_ERR(mtty_dev.vd_class);
 		goto failed1;
 	}
 
@@ -1458,7 +1459,8 @@ static int __init mtty_dev_init(void)
 	if (ret)
 		goto failed2;
 
-	if (mdev_register_device(&mtty_dev.dev, &mdev_fops) != 0)
+	ret = mdev_register_device(&mtty_dev.dev, &mdev_fops);
+	if (ret)
 		goto failed3;
 
 	mutex_init(&mdev_list_lock);
--
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