linux-imx

/*

 * Copyright (C) 2011 Instituto Nokia de Tecnologia

 *

 * Authors:

 *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>

 *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>

 *

 * 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.

 *

 * 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, see <http://www.gnu.org/licenses/>.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__

​

#include <net/tcp_states.h>

#include <linux/nfc.h>

#include <linux/export.h>

​

#include "nfc.h"

​

static struct nfc_sock_list raw_sk_list = {

    .lock = __RW_LOCK_UNLOCKED(raw_sk_list.lock)

};

​

static void nfc_sock_link(struct nfc_sock_list *l, struct sock *sk)

{

    write_lock(&l->lock);

    sk_add_node(sk, &l->head);

    write_unlock(&l->lock);

}

​

static void nfc_sock_unlink(struct nfc_sock_list *l, struct sock *sk)

{

    write_lock(&l->lock);

    sk_del_node_init(sk);

    write_unlock(&l->lock);

}

​

static void rawsock_write_queue_purge(struct sock *sk)

{

    pr_debug("sk=%p\n", sk);

​

    spin_lock_bh(&sk->sk_write_queue.lock);

    __skb_queue_purge(&sk->sk_write_queue);

    nfc_rawsock(sk)->tx_work_scheduled = false;

    spin_unlock_bh(&sk->sk_write_queue.lock);

}

​

static void rawsock_report_error(struct sock *sk, int err)

{

    pr_debug("sk=%p err=%d\n", sk, err);

​

    sk->sk_shutdown = SHUTDOWN_MASK;

    sk->sk_err = -err;