diff options
Diffstat (limited to 'drivers/hid/hid-holtek-kbd.c')
| -rw-r--r-- | drivers/hid/hid-holtek-kbd.c | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/drivers/hid/hid-holtek-kbd.c b/drivers/hid/hid-holtek-kbd.c index 6e1a4a4fc0c1..d13543517a6c 100644 --- a/drivers/hid/hid-holtek-kbd.c +++ b/drivers/hid/hid-holtek-kbd.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * HID driver for Holtek keyboard * Copyright (c) 2012 Tom Harwood */ /* - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. */ #include <linux/device.h> @@ -30,7 +27,7 @@ * to the boot interface. */ -static __u8 holtek_kbd_rdesc_fixed[] = { +static const __u8 holtek_kbd_rdesc_fixed[] = { /* Original report descriptor, with reduced number of consumer usages */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x80, /* Usage (Sys Control), */ @@ -105,14 +102,14 @@ static __u8 holtek_kbd_rdesc_fixed[] = { 0xC0, /* End Collection */ }; -static __u8 *holtek_kbd_report_fixup(struct hid_device *hdev, __u8 *rdesc, +static const __u8 *holtek_kbd_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { struct usb_interface *intf = to_usb_interface(hdev->dev.parent); if (intf->cur_altsetting->desc.bInterfaceNumber == 1) { - rdesc = holtek_kbd_rdesc_fixed; *rsize = sizeof(holtek_kbd_rdesc_fixed); + return holtek_kbd_rdesc_fixed; } return rdesc; } @@ -126,9 +123,18 @@ 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); + if (list_empty(&boot_hid->inputs)) { + hid_err(hid, "no inputs found\n"); + return -ENODEV; + } + 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, @@ -138,12 +144,17 @@ static int holtek_kbd_input_event(struct input_dev *dev, unsigned int type, static int holtek_kbd_probe(struct hid_device *hdev, const struct hid_device_id *id) { - struct usb_interface *intf = to_usb_interface(hdev->dev.parent); - int ret = hid_parse(hdev); + struct usb_interface *intf; + int ret; + + if (!hid_is_usb(hdev)) + return -EINVAL; + ret = hid_parse(hdev); if (!ret) ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); + intf = to_usb_interface(hdev->dev.parent); if (!ret && intf->cur_altsetting->desc.bInterfaceNumber == 1) { struct hid_input *hidinput; list_for_each_entry(hidinput, &hdev->inputs, list) { @@ -169,4 +180,5 @@ static struct hid_driver holtek_kbd_driver = { }; module_hid_driver(holtek_kbd_driver); +MODULE_DESCRIPTION("HID driver for Holtek keyboard"); MODULE_LICENSE("GPL"); |