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authorChengguang Xu <cgxu519@gmx.com>2019-02-12 13:59:30 +0800
committerAlex Williamson <alex.williamson@redhat.com>2019-02-12 13:21:05 -0700
commit16355214a54efdb82a48d77b5389ee6fcc73015e (patch)
tree439c2ce79daed19dbf2b2e7521e2e99e200342d0 /samples
parent8bcb64a51065e957e170ada58cbbd766be6a9619 (diff)
downloadlinux-stericsson-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')
-rw-r--r--samples/vfio-mdev/mbochs.c8
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;
}