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| author | Chengguang Xu <cgxu519@gmx.com> | 2019-02-12 13:59:30 +0800 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2019-02-12 13:21:05 -0700 |
| commit | 16355214a54efdb82a48d77b5389ee6fcc73015e (patch) | |
| tree | 439c2ce79daed19dbf2b2e7521e2e99e200342d0 /samples/vfio-mdev | |
| parent | 8bcb64a51065e957e170ada58cbbd766be6a9619 (diff) | |
| download | linux-16355214a54efdb82a48d77b5389ee6fcc73015e.tar.gz | |
samples/vfio-mdev/mbochs: 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: Chengguang Xu <cgxu519@gmx.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'samples/vfio-mdev')
| -rw-r--r-- | samples/vfio-mdev/mbochs.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c index ca7960adf5a3..b038aa9f5a70 100644 --- a/samples/vfio-mdev/mbochs.c +++ b/samples/vfio-mdev/mbochs.c @@ -1448,13 +1448,13 @@ static int __init mbochs_dev_init(void) { int ret = 0; - ret = alloc_chrdev_region(&mbochs_devt, 0, MINORMASK, MBOCHS_NAME); + ret = alloc_chrdev_region(&mbochs_devt, 0, MINORMASK + 1, MBOCHS_NAME); if (ret < 0) { pr_err("Error: failed to register mbochs_dev, err: %d\n", ret); return ret; } cdev_init(&mbochs_cdev, &vd_fops); - cdev_add(&mbochs_cdev, mbochs_devt, MINORMASK); + cdev_add(&mbochs_cdev, mbochs_devt, MINORMASK + 1); pr_info("%s: major %d\n", __func__, MAJOR(mbochs_devt)); mbochs_class = class_create(THIS_MODULE, MBOCHS_CLASS_NAME); @@ -1483,7 +1483,7 @@ failed2: class_destroy(mbochs_class); failed1: cdev_del(&mbochs_cdev); - unregister_chrdev_region(mbochs_devt, MINORMASK); + unregister_chrdev_region(mbochs_devt, MINORMASK + 1); return ret; } @@ -1494,7 +1494,7 @@ static void __exit mbochs_dev_exit(void) device_unregister(&mbochs_dev); cdev_del(&mbochs_cdev); - unregister_chrdev_region(mbochs_devt, MINORMASK); + unregister_chrdev_region(mbochs_devt, MINORMASK + 1); class_destroy(mbochs_class); mbochs_class = NULL; } |