481419ec9f
Fix a crash in the apm-power driver when an input-device, such as keyboard driver module, is unloaded. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
129 lines
2.6 KiB
C
129 lines
2.6 KiB
C
/*
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* Input Power Event -> APM Bridge
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*
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* Copyright (c) 2007 Richard Purdie
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/tty.h>
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/apm-emulation.h>
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static void system_power_event(unsigned int keycode)
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{
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switch (keycode) {
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case KEY_SUSPEND:
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apm_queue_event(APM_USER_SUSPEND);
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printk(KERN_INFO "apm-power: Requesting system suspend...\n");
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break;
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default:
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break;
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}
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}
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static void apmpower_event(struct input_handle *handle, unsigned int type,
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unsigned int code, int value)
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{
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/* only react on key down events */
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if (value != 1)
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return;
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switch (type) {
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case EV_PWR:
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system_power_event(code);
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break;
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default:
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break;
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}
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}
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static int apmpower_connect(struct input_handler *handler,
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struct input_dev *dev,
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const struct input_device_id *id)
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{
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struct input_handle *handle;
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int error;
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handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
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if (!handle)
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return -ENOMEM;
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handle->dev = dev;
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handle->handler = handler;
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handle->name = "apm-power";
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error = input_register_handle(handle);
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if (error) {
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printk(KERN_ERR
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"apm-power: Failed to register input power handler, "
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"error %d\n", error);
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kfree(handle);
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return error;
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}
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error = input_open_device(handle);
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if (error) {
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printk(KERN_ERR
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"apm-power: Failed to open input power device, "
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"error %d\n", error);
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input_unregister_handle(handle);
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kfree(handle);
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return error;
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}
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return 0;
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}
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static void apmpower_disconnect(struct input_handle *handle)
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{
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input_close_device(handle);
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input_unregister_handle(handle);
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kfree(handle);
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}
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static const struct input_device_id apmpower_ids[] = {
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{
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.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
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.evbit = { BIT_MASK(EV_PWR) },
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},
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{ },
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};
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MODULE_DEVICE_TABLE(input, apmpower_ids);
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static struct input_handler apmpower_handler = {
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.event = apmpower_event,
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.connect = apmpower_connect,
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.disconnect = apmpower_disconnect,
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.name = "apm-power",
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.id_table = apmpower_ids,
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};
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static int __init apmpower_init(void)
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{
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return input_register_handler(&apmpower_handler);
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}
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static void __exit apmpower_exit(void)
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{
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input_unregister_handler(&apmpower_handler);
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}
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module_init(apmpower_init);
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module_exit(apmpower_exit);
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MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
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MODULE_DESCRIPTION("Input Power Event -> APM Bridge");
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MODULE_LICENSE("GPL");
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