HID: wacom: generic: Treat serial number and related fields as unsigned

[mirror_ubuntu-bionic-kernel.git] / drivers / hid / hid-holtek-kbd.c

diff --git a/drivers/hid/hid-holtek-kbd.c b/drivers/hid/hid-holtek-kbd.c
index 6e1a4a4fc0c109f7bf60083963d8c239a10939cf..ab9da597106fa5f49d4a12c07cbfff76ad33088d 100644 (file)
--- a/drivers/hid/hid-holtek-kbd.c
+++ b/drivers/hid/hid-holtek-kbd.c
@@ -126,9 +126,14 @@ static int holtek_kbd_input_event(struct input_dev *dev, unsigned int type,
 
        /* Locate the boot interface, to receive the LED change events */
        struct usb_interface *boot_interface = usb_ifnum_to_if(usb_dev, 0);
+       struct hid_device *boot_hid;
+       struct hid_input *boot_hid_input;
 
-       struct hid_device *boot_hid = usb_get_intfdata(boot_interface);
-       struct hid_input *boot_hid_input = list_first_entry(&boot_hid->inputs,
+       if (unlikely(boot_interface == NULL))
+               return -ENODEV;
+
+       boot_hid = usb_get_intfdata(boot_interface);
+       boot_hid_input = list_first_entry(&boot_hid->inputs,
                struct hid_input, list);
 
        return boot_hid_input->input->event(boot_hid_input->input, type, code,