forked from luck/tmp_suning_uos_patched
d8e4ebf8b6
Fix oops caused by dereferencing field->hidinput in cases where the device hasn't been claimed by hid-input. Reported-by: Andreas Demmer <mail@andreas-demmer.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/*
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* HID driver for some gyration "special" devices
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*
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* Copyright (c) 1999 Andreas Gal
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* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
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* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
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* Copyright (c) 2007 Paul Walmsley
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* Copyright (c) 2008 Jiri Slaby
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* Copyright (c) 2006-2008 Jiri Kosina
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/device.h>
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#include <linux/input.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include "hid-ids.h"
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#define gy_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
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EV_KEY, (c))
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static int gyration_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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if ((usage->hid & HID_USAGE_PAGE) != HID_UP_LOGIVENDOR)
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return 0;
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set_bit(EV_REP, hi->input->evbit);
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switch (usage->hid & HID_USAGE) {
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/* Reported on Gyration MCE Remote */
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case 0x00d: gy_map_key_clear(KEY_HOME); break;
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case 0x024: gy_map_key_clear(KEY_DVD); break;
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case 0x025: gy_map_key_clear(KEY_PVR); break;
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case 0x046: gy_map_key_clear(KEY_MEDIA); break;
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case 0x047: gy_map_key_clear(KEY_MP3); break;
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case 0x048: gy_map_key_clear(KEY_MEDIA); break;
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case 0x049: gy_map_key_clear(KEY_CAMERA); break;
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case 0x04a: gy_map_key_clear(KEY_VIDEO); break;
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default:
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return 0;
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}
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return 1;
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}
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static int gyration_event(struct hid_device *hdev, struct hid_field *field,
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struct hid_usage *usage, __s32 value)
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{
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if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)
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return 0;
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if ((usage->hid & HID_USAGE_PAGE) == HID_UP_GENDESK &&
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(usage->hid & 0xff) == 0x82) {
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struct input_dev *input = field->hidinput->input;
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input_event(input, usage->type, usage->code, 1);
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input_sync(input);
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input_event(input, usage->type, usage->code, 0);
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input_sync(input);
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return 1;
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}
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return 0;
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}
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static const struct hid_device_id gyration_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, gyration_devices);
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static struct hid_driver gyration_driver = {
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.name = "gyration",
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.id_table = gyration_devices,
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.input_mapping = gyration_input_mapping,
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.event = gyration_event,
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};
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static int __init gyration_init(void)
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{
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return hid_register_driver(&gyration_driver);
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}
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static void __exit gyration_exit(void)
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{
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hid_unregister_driver(&gyration_driver);
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}
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module_init(gyration_init);
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module_exit(gyration_exit);
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MODULE_LICENSE("GPL");
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