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authorChengguang Xu <cgxu519@gmx.com>2019-02-12 13:59:31 +0800
committerAlex Williamson <alex.williamson@redhat.com>2019-02-12 13:21:14 -0700
commit18bc04bc8a2aa95c33c6613c5fffc4d3535397f0 (patch)
treef712d693bcb34811336782b63c47f298e84cb4d8 /samples
parent16355214a54efdb82a48d77b5389ee6fcc73015e (diff)
downloadlinux-stericsson-18bc04bc8a2aa95c33c6613c5fffc4d3535397f0.tar.gz
samples/vfio-mdev/mdpy: 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/mdpy.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/samples/vfio-mdev/mdpy.c b/samples/vfio-mdev/mdpy.c
index 96e7969c473a..cc86bf6566e4 100644
--- a/samples/vfio-mdev/mdpy.c
+++ b/samples/vfio-mdev/mdpy.c
@@ -752,13 +752,13 @@ static int __init mdpy_dev_init(void)
{
int ret = 0;
- ret = alloc_chrdev_region(&mdpy_devt, 0, MINORMASK, MDPY_NAME);
+ ret = alloc_chrdev_region(&mdpy_devt, 0, MINORMASK + 1, MDPY_NAME);
if (ret < 0) {
pr_err("Error: failed to register mdpy_dev, err: %d\n", ret);
return ret;
}
cdev_init(&mdpy_cdev, &vd_fops);
- cdev_add(&mdpy_cdev, mdpy_devt, MINORMASK);
+ cdev_add(&mdpy_cdev, mdpy_devt, MINORMASK + 1);
pr_info("%s: major %d\n", __func__, MAJOR(mdpy_devt));
mdpy_class = class_create(THIS_MODULE, MDPY_CLASS_NAME);
@@ -787,7 +787,7 @@ failed2:
class_destroy(mdpy_class);
failed1:
cdev_del(&mdpy_cdev);
- unregister_chrdev_region(mdpy_devt, MINORMASK);
+ unregister_chrdev_region(mdpy_devt, MINORMASK + 1);
return ret;
}
@@ -798,7 +798,7 @@ static void __exit mdpy_dev_exit(void)
device_unregister(&mdpy_dev);
cdev_del(&mdpy_cdev);
- unregister_chrdev_region(mdpy_devt, MINORMASK);
+ unregister_chrdev_region(mdpy_devt, MINORMASK + 1);
class_destroy(mdpy_class);
mdpy_class = NULL;
}