Revision 8718d36cf99f5acf0f37487557ec25aee54b930b authored by Nick Piggin on 31 May 2010, 07:58:02 UTC, committed by Al Viro on 04 June 2010, 21:16:29 UTC
sysfs and configfs setattr functions have error cases after the generic inode's attributes have been changed. Fix consistency by changing the generic inode attributes only when it is guaranteed to succeed. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1 parent 5b54470
hid-ezkey.c
/*
* HID driver for some ezkey "special" devices
*
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
* Copyright (c) 2006-2007 Jiri Kosina
* Copyright (c) 2007 Paul Walmsley
* Copyright (c) 2008 Jiri Slaby
*/
/*
* 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>
#include <linux/input.h>
#include <linux/hid.h>
#include <linux/module.h>
#include "hid-ids.h"
#define ez_map_rel(c) hid_map_usage(hi, usage, bit, max, EV_REL, (c))
#define ez_map_key(c) hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
static int ez_input_mapping(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
return 0;
switch (usage->hid & HID_USAGE) {
case 0x230: ez_map_key(BTN_MOUSE); break;
case 0x231: ez_map_rel(REL_WHEEL); break;
/*
* this keyboard has a scrollwheel implemented in
* totally broken way. We map this usage temporarily
* to HWHEEL and handle it in the event quirk handler
*/
case 0x232: ez_map_rel(REL_HWHEEL); break;
default:
return 0;
}
return 1;
}
static int ez_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
!usage->type)
return 0;
/* handle the temporary quirky mapping to HWHEEL */
if (usage->type == EV_REL && usage->code == REL_HWHEEL) {
struct input_dev *input = field->hidinput->input;
input_event(input, usage->type, REL_WHEEL, -value);
return 1;
}
return 0;
}
static const struct hid_device_id ez_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
{ }
};
MODULE_DEVICE_TABLE(hid, ez_devices);
static struct hid_driver ez_driver = {
.name = "ezkey",
.id_table = ez_devices,
.input_mapping = ez_input_mapping,
.event = ez_event,
};
static int __init ez_init(void)
{
return hid_register_driver(&ez_driver);
}
static void __exit ez_exit(void)
{
hid_unregister_driver(&ez_driver);
}
module_init(ez_init);
module_exit(ez_exit);
MODULE_LICENSE("GPL");
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