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Commit 8bcb64a5 authored by Chengguang Xu's avatar Chengguang Xu Committed by Alex Williamson
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vfio: expand minor range when registering chrdev region 



Actually, total amount of available minor number
for a single major is MINORMARK + 1. So expand
minor range when registering chrdev region.

Signed-off-by: default avatarChengguang Xu <cgxu519@gmx.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent 3c8d7ef8

drivers/vfio/vfio.c

+4 −4
Original line number Diff line number Diff line
@@ -2219,12 +2219,12 @@ static int __init vfio_init(void) 


	vfio.class->devnode = vfio_devnode;



	ret = alloc_chrdev_region(&vfio.group_devt, 0, MINORMASK, "vfio");

	ret = alloc_chrdev_region(&vfio.group_devt, 0, MINORMASK + 1, "vfio");

	if (ret)

		goto err_alloc_chrdev;



	cdev_init(&vfio.group_cdev, &vfio_group_fops);

	ret = cdev_add(&vfio.group_cdev, vfio.group_devt, MINORMASK);

	ret = cdev_add(&vfio.group_cdev, vfio.group_devt, MINORMASK + 1);

	if (ret)

		goto err_cdev_add;
@@ -2236,7 +2236,7 @@ static int __init vfio_init(void) 
	return 0;



err_cdev_add:

	unregister_chrdev_region(vfio.group_devt, MINORMASK);

	unregister_chrdev_region(vfio.group_devt, MINORMASK + 1);

err_alloc_chrdev:

	class_destroy(vfio.class);

	vfio.class = NULL;
@@ -2254,7 +2254,7 @@ static void __exit vfio_cleanup(void) 
#endif

	idr_destroy(&vfio.group_idr);

	cdev_del(&vfio.group_cdev);

	unregister_chrdev_region(vfio.group_devt, MINORMASK);

	unregister_chrdev_region(vfio.group_devt, MINORMASK + 1);

	class_destroy(vfio.class);

	vfio.class = NULL;

	misc_deregister(&vfio_dev);