linux-imx

/*

 * 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 <linux/uaccess.h>

#include "input-compat.h"

​

#ifdef CONFIG_COMPAT

​

int input_event_from_user(const char __user *buffer,

              struct input_event *event)

{

    if (in_compat_syscall() && !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->input_event_sec = compat_event.sec;

        event->input_event_usec = compat_event.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 (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) {

        struct input_event_compat compat_event;

​

        compat_event.sec = event->input_event_sec;

        compat_event.usec = event->input_event_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;

}