linux-imx

/*

 * Linux WiMAX

 * Internal API for kernel space WiMAX stack

 *

 *

 * Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com>

 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA.

 *

 *

 * This header file is for declarations and definitions internal to

 * the WiMAX stack. For public APIs and documentation, see

 * include/net/wimax.h and include/linux/wimax.h.

 */

​

#ifndef __WIMAX_INTERNAL_H__

#define __WIMAX_INTERNAL_H__

#ifdef __KERNEL__

​

#ifdef pr_fmt

#undef pr_fmt

#endif

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/device.h>

#include <net/wimax.h>

​

​

/*

 * Decide if a (locked) device is ready for use

 *

 * Before using the device structure, it must be locked

 * (wimax_dev->mutex). As well, most operations need to call this

 * function to check if the state is the right one.

 *

 * An error value will be returned if the state is not the right

 * one. In that case, the caller should not attempt to use the device

 * and just unlock it.

 */

static inline __must_check

int wimax_dev_is_ready(struct wimax_dev *wimax_dev)

{

    if (wimax_dev->state == __WIMAX_ST_NULL)

        return -EINVAL; /* Device is not even registered! */

    if (wimax_dev->state == WIMAX_ST_DOWN)

        return -ENOMEDIUM;

    if (wimax_dev->state == __WIMAX_ST_QUIESCING)

        return -ESHUTDOWN;

    return 0;