HID: use kobj_to_dev()

Use kobj_to_dev() instead of open-coding it.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/hid/hid-roccat-arvo.c b/drivers/hid/hid-roccat-arvo.c
index 1948208fe038..329c5d1270f9 100644
--- a/drivers/hid/hid-roccat-arvo.c
+++ b/drivers/hid/hid-roccat-arvo.c
@@ -191,8 +191,7 @@ static ssize_t arvo_sysfs_write(struct file *fp,
                 struct kobject *kobj, void const *buf,
                 loff_t off, size_t count, size_t real_size, uint command)
 {
-        struct device *dev =
-                        container_of(kobj, struct device, kobj)->parent->parent;
+        struct device *dev = kobj_to_dev(kobj)->parent->parent;
         struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
         int retval;
@@ -211,8 +210,7 @@ static ssize_t arvo_sysfs_read(struct file *fp,
                 struct kobject *kobj, void *buf, loff_t off,
                 size_t count, size_t real_size, uint command)
 {
-        struct device *dev =
-                        container_of(kobj, struct device, kobj)->parent->parent;
+        struct device *dev = kobj_to_dev(kobj)->parent->parent;
         struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
         struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
         int retval;