@@ -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);
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: Chengguang Xu <cgxu519@gmx.com> --- drivers/vfio/vfio.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)