mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
f930a7a0f4
Enable the input system to be used with a compat ABI with 64-bit time. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
/*
|
|
* 32bit compatibility wrappers for the input subsystem.
|
|
*
|
|
* Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <asm/uaccess.h>
|
|
#include "input-compat.h"
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
int input_event_from_user(const char __user *buffer,
|
|
struct input_event *event)
|
|
{
|
|
if (INPUT_COMPAT_TEST && !COMPAT_USE_64BIT_TIME) {
|
|
struct input_event_compat compat_event;
|
|
|
|
if (copy_from_user(&compat_event, buffer,
|
|
sizeof(struct input_event_compat)))
|
|
return -EFAULT;
|
|
|
|
event->time.tv_sec = compat_event.time.tv_sec;
|
|
event->time.tv_usec = compat_event.time.tv_usec;
|
|
event->type = compat_event.type;
|
|
event->code = compat_event.code;
|
|
event->value = compat_event.value;
|
|
|
|
} else {
|
|
if (copy_from_user(event, buffer, sizeof(struct input_event)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int input_event_to_user(char __user *buffer,
|
|
const struct input_event *event)
|
|
{
|
|
if (INPUT_COMPAT_TEST && !COMPAT_USE_64BIT_TIME) {
|
|
struct input_event_compat compat_event;
|
|
|
|
compat_event.time.tv_sec = event->time.tv_sec;
|
|
compat_event.time.tv_usec = event->time.tv_usec;
|
|
compat_event.type = event->type;
|
|
compat_event.code = event->code;
|
|
compat_event.value = event->value;
|
|
|
|
if (copy_to_user(buffer, &compat_event,
|
|
sizeof(struct input_event_compat)))
|
|
return -EFAULT;
|
|
|
|
} else {
|
|
if (copy_to_user(buffer, event, sizeof(struct input_event)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int input_ff_effect_from_user(const char __user *buffer, size_t size,
|
|
struct ff_effect *effect)
|
|
{
|
|
if (INPUT_COMPAT_TEST) {
|
|
struct ff_effect_compat *compat_effect;
|
|
|
|
if (size != sizeof(struct ff_effect_compat))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* It so happens that the pointer which needs to be changed
|
|
* is the last field in the structure, so we can retrieve the
|
|
* whole thing and replace just the pointer.
|
|
*/
|
|
compat_effect = (struct ff_effect_compat *)effect;
|
|
|
|
if (copy_from_user(compat_effect, buffer,
|
|
sizeof(struct ff_effect_compat)))
|
|
return -EFAULT;
|
|
|
|
if (compat_effect->type == FF_PERIODIC &&
|
|
compat_effect->u.periodic.waveform == FF_CUSTOM)
|
|
effect->u.periodic.custom_data =
|
|
compat_ptr(compat_effect->u.periodic.custom_data);
|
|
} else {
|
|
if (size != sizeof(struct ff_effect))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
int input_event_from_user(const char __user *buffer,
|
|
struct input_event *event)
|
|
{
|
|
if (copy_from_user(event, buffer, sizeof(struct input_event)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int input_event_to_user(char __user *buffer,
|
|
const struct input_event *event)
|
|
{
|
|
if (copy_to_user(buffer, event, sizeof(struct input_event)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int input_ff_effect_from_user(const char __user *buffer, size_t size,
|
|
struct ff_effect *effect)
|
|
{
|
|
if (size != sizeof(struct ff_effect))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(effect, buffer, sizeof(struct ff_effect)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_COMPAT */
|
|
|
|
EXPORT_SYMBOL_GPL(input_event_from_user);
|
|
EXPORT_SYMBOL_GPL(input_event_to_user);
|
|
EXPORT_SYMBOL_GPL(input_ff_effect_from_user);
|