NFC: Move LLCP code to the NFC top level diirectory

And stop making it optional. LLCP is a fundamental part of the NFC
specifications and making it optional does not make much sense.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 0 insertions, 1624 deletions

diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
deleted file mode 100644
index 9e483c8..0000000
--- a/net/nfc/llcp/llcp.c
+++ /dev/null
@@ -1,1624 +0,0 @@
-/*
- * Copyright (C) 2011  Intel Corporation. All rights reserved.
- *
- * 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, write to the
- * Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#define pr_fmt(fmt) "llcp: %s: " fmt, __func__
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/nfc.h>
-
-#include "../nfc.h"
-#include "llcp.h"
-
-static u8 llcp_magic[3] = {0x46, 0x66, 0x6d};
-
-static struct list_head llcp_devices;
-
-static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb);
-
-void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *sk)
-{
-	write_lock(&l->lock);
-	sk_add_node(sk, &l->head);
-	write_unlock(&l->lock);
-}
-
-void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk)
-{
-	write_lock(&l->lock);
-	sk_del_node_init(sk);
-	write_unlock(&l->lock);
-}
-
-void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock)
-{
-	sock->remote_rw = LLCP_DEFAULT_RW;
-	sock->remote_miu = LLCP_MAX_MIU + 1;
-}
-
-static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock)
-{
-	struct nfc_llcp_local *local = sock->local;
-	struct sk_buff *s, *tmp;
-
-	pr_debug("%p\n", &sock->sk);
-
-	skb_queue_purge(&sock->tx_queue);
-	skb_queue_purge(&sock->tx_pending_queue);
-
-	if (local == NULL)
-		return;
-
-	/* Search for local pending SKBs that are related to this socket */
-	skb_queue_walk_safe(&local->tx_queue, s, tmp) {
-		if (s->sk != &sock->sk)
-			continue;
-
-		skb_unlink(s, &local->tx_queue);
-		kfree_skb(s);
-	}
-}
-
-static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool device,
-				    int err)
-{
-	struct sock *sk;
-	struct hlist_node *tmp;
-	struct nfc_llcp_sock *llcp_sock;
-
-	skb_queue_purge(&local->tx_queue);
-
-	write_lock(&local->sockets.lock);
-
-	sk_for_each_safe(sk, tmp, &local->sockets.head) {
-		llcp_sock = nfc_llcp_sock(sk);
-
-		bh_lock_sock(sk);
-
-		nfc_llcp_socket_purge(llcp_sock);
-
-		if (sk->sk_state == LLCP_CONNECTED)
-			nfc_put_device(llcp_sock->dev);
-
-		if (sk->sk_state == LLCP_LISTEN) {
-			struct nfc_llcp_sock *lsk, *n;
-			struct sock *accept_sk;
-
-			list_for_each_entry_safe(lsk, n,
-						 &llcp_sock->accept_queue,
-						 accept_queue) {
-				accept_sk = &lsk->sk;
-				bh_lock_sock(accept_sk);
-
-				nfc_llcp_accept_unlink(accept_sk);
-
-				if (err)
-					accept_sk->sk_err = err;
-				accept_sk->sk_state = LLCP_CLOSED;
-				accept_sk->sk_state_change(sk);
-
-				bh_unlock_sock(accept_sk);
-			}
-		}
-
-		if (err)
-			sk->sk_err = err;
-		sk->sk_state = LLCP_CLOSED;
-		sk->sk_state_change(sk);
-
-		bh_unlock_sock(sk);
-
-		sk_del_node_init(sk);
-	}
-
-	write_unlock(&local->sockets.lock);
-
-	/* If we still have a device, we keep the RAW sockets alive */
-	if (device == true)
-		return;
-
-	write_lock(&local->raw_sockets.lock);
-
-	sk_for_each_safe(sk, tmp, &local->raw_sockets.head) {
-		llcp_sock = nfc_llcp_sock(sk);
-
-		bh_lock_sock(sk);
-
-		nfc_llcp_socket_purge(llcp_sock);
-
-		if (err)
-			sk->sk_err = err;
-		sk->sk_state = LLCP_CLOSED;
-		sk->sk_state_change(sk);
-
-		bh_unlock_sock(sk);
-
-		sk_del_node_init(sk);
-	}
-
-	write_unlock(&local->raw_sockets.lock);
-}
-
-struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local)
-{
-	kref_get(&local->ref);
-
-	return local;
-}
-
-static void local_cleanup(struct nfc_llcp_local *local)
-{
-	nfc_llcp_socket_release(local, false, ENXIO);
-	del_timer_sync(&local->link_timer);
-	skb_queue_purge(&local->tx_queue);
-	cancel_work_sync(&local->tx_work);
-	cancel_work_sync(&local->rx_work);
-	cancel_work_sync(&local->timeout_work);
-	kfree_skb(local->rx_pending);
-	del_timer_sync(&local->sdreq_timer);
-	cancel_work_sync(&local->sdreq_timeout_work);
-	nfc_llcp_free_sdp_tlv_list(&local->pending_sdreqs);
-}
-
-static void local_release(struct kref *ref)
-{
-	struct nfc_llcp_local *local;
-
-	local = container_of(ref, struct nfc_llcp_local, ref);
-
-	list_del(&local->list);
-	local_cleanup(local);
-	kfree(local);
-}
-
-int nfc_llcp_local_put(struct nfc_llcp_local *local)
-{
-	if (local == NULL)
-		return 0;
-
-	return kref_put(&local->ref, local_release);
-}
-
-static struct nfc_llcp_sock *nfc_llcp_sock_get(struct nfc_llcp_local *local,
-					       u8 ssap, u8 dsap)
-{
-	struct sock *sk;
-	struct nfc_llcp_sock *llcp_sock, *tmp_sock;
-
-	pr_debug("ssap dsap %d %d\n", ssap, dsap);
-
-	if (ssap == 0 && dsap == 0)
-		return NULL;
-
-	read_lock(&local->sockets.lock);
-
-	llcp_sock = NULL;
-
-	sk_for_each(sk, &local->sockets.head) {
-		tmp_sock = nfc_llcp_sock(sk);
-
-		if (tmp_sock->ssap == ssap && tmp_sock->dsap == dsap) {
-			llcp_sock = tmp_sock;
-			break;
-		}
-	}
-
-	read_unlock(&local->sockets.lock);
-
-	if (llcp_sock == NULL)
-		return NULL;
-
-	sock_hold(&llcp_sock->sk);
-
-	return llcp_sock;
-}
-
-static void nfc_llcp_sock_put(struct nfc_llcp_sock *sock)
-{
-	sock_put(&sock->sk);
-}
-
-static void nfc_llcp_timeout_work(struct work_struct *work)
-{
-	struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
-						    timeout_work);
-
-	nfc_dep_link_down(local->dev);
-}
-
-static void nfc_llcp_symm_timer(unsigned long data)
-{
-	struct nfc_llcp_local *local = (struct nfc_llcp_local *) data;
-
-	pr_err("SYMM timeout\n");
-
-	schedule_work(&local->timeout_work);
-}
-
-static void nfc_llcp_sdreq_timeout_work(struct work_struct *work)
-{
-	unsigned long time;
-	HLIST_HEAD(nl_sdres_list);
-	struct hlist_node *n;
-	struct nfc_llcp_sdp_tlv *sdp;
-	struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
-						    sdreq_timeout_work);
-
-	mutex_lock(&local->sdreq_lock);
-
-	time = jiffies - msecs_to_jiffies(3 * local->remote_lto);
-
-	hlist_for_each_entry_safe(sdp, n, &local->pending_sdreqs, node) {
-		if (time_after(sdp->time, time))
-			continue;
-
-		sdp->sap = LLCP_SDP_UNBOUND;
-
-		hlist_del(&sdp->node);
-
-		hlist_add_head(&sdp->node, &nl_sdres_list);
-	}
-
-	if (!hlist_empty(&local->pending_sdreqs))
-		mod_timer(&local->sdreq_timer,
-			  jiffies + msecs_to_jiffies(3 * local->remote_lto));
-
-	mutex_unlock(&local->sdreq_lock);
-
-	if (!hlist_empty(&nl_sdres_list))
-		nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list);
-}
-
-static void nfc_llcp_sdreq_timer(unsigned long data)
-{
-	struct nfc_llcp_local *local = (struct nfc_llcp_local *) data;
-
-	schedule_work(&local->sdreq_timeout_work);
-}
-
-struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
-{
-	struct nfc_llcp_local *local, *n;
-
-	list_for_each_entry_safe(local, n, &llcp_devices, list)
-		if (local->dev == dev)
-			return local;
-
-	pr_debug("No device found\n");
-
-	return NULL;
-}
-
-static char *wks[] = {
-	NULL,
-	NULL, /* SDP */
-	"urn:nfc:sn:ip",
-	"urn:nfc:sn:obex",
-	"urn:nfc:sn:snep",
-};
-
-static int nfc_llcp_wks_sap(char *service_name, size_t service_name_len)
-{
-	int sap, num_wks;
-
-	pr_debug("%s\n", service_name);
-
-	if (service_name == NULL)
-		return -EINVAL;
-
-	num_wks = ARRAY_SIZE(wks);
-
-	for (sap = 0; sap < num_wks; sap++) {
-		if (wks[sap] == NULL)
-			continue;
-
-		if (strncmp(wks[sap], service_name, service_name_len) == 0)
-			return sap;
-	}
-
-	return -EINVAL;
-}
-
-static
-struct nfc_llcp_sock *nfc_llcp_sock_from_sn(struct nfc_llcp_local *local,
-					    u8 *sn, size_t sn_len)
-{
-	struct sock *sk;
-	struct nfc_llcp_sock *llcp_sock, *tmp_sock;
-
-	pr_debug("sn %zd %p\n", sn_len, sn);
-
-	if (sn == NULL || sn_len == 0)
-		return NULL;
-
-	read_lock(&local->sockets.lock);
-
-	llcp_sock = NULL;
-
-	sk_for_each(sk, &local->sockets.head) {
-		tmp_sock = nfc_llcp_sock(sk);
-
-		pr_debug("llcp sock %p\n", tmp_sock);
-
-		if (tmp_sock->sk.sk_type == SOCK_STREAM &&
-		    tmp_sock->sk.sk_state != LLCP_LISTEN)
-			continue;
-
-		if (tmp_sock->sk.sk_type == SOCK_DGRAM &&
-		    tmp_sock->sk.sk_state != LLCP_BOUND)
-			continue;
-
-		if (tmp_sock->service_name == NULL ||
-		    tmp_sock->service_name_len == 0)
-			continue;
-
-		if (tmp_sock->service_name_len != sn_len)
-			continue;
-
-		if (memcmp(sn, tmp_sock->service_name, sn_len) == 0) {
-			llcp_sock = tmp_sock;
-			break;
-		}
-	}
-
-	read_unlock(&local->sockets.lock);
-
-	pr_debug("Found llcp sock %p\n", llcp_sock);
-
-	return llcp_sock;
-}
-
-u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
-			 struct nfc_llcp_sock *sock)
-{
-	mutex_lock(&local->sdp_lock);
-
-	if (sock->service_name != NULL && sock->service_name_len > 0) {
-		int ssap = nfc_llcp_wks_sap(sock->service_name,
-					    sock->service_name_len);
-
-		if (ssap > 0) {
-			pr_debug("WKS %d\n", ssap);
-
-			/* This is a WKS, let's check if it's free */
-			if (local->local_wks & BIT(ssap)) {
-				mutex_unlock(&local->sdp_lock);
-
-				return LLCP_SAP_MAX;
-			}
-
-			set_bit(ssap, &local->local_wks);
-			mutex_unlock(&local->sdp_lock);
-
-			return ssap;
-		}
-
-		/*
-		 * Check if there already is a non WKS socket bound
-		 * to this service name.
-		 */
-		if (nfc_llcp_sock_from_sn(local, sock->service_name,
-					  sock->service_name_len) != NULL) {
-			mutex_unlock(&local->sdp_lock);
-
-			return LLCP_SAP_MAX;
-		}
-
-		mutex_unlock(&local->sdp_lock);
-
-		return LLCP_SDP_UNBOUND;
-
-	} else if (sock->ssap != 0 && sock->ssap < LLCP_WKS_NUM_SAP) {
-		if (!test_bit(sock->ssap, &local->local_wks)) {
-			set_bit(sock->ssap, &local->local_wks);
-			mutex_unlock(&local->sdp_lock);
-
-			return sock->ssap;
-		}
-	}
-
-	mutex_unlock(&local->sdp_lock);
-
-	return LLCP_SAP_MAX;
-}
-
-u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local)
-{
-	u8 local_ssap;
-
-	mutex_lock(&local->sdp_lock);
-
-	local_ssap = find_first_zero_bit(&local->local_sap, LLCP_LOCAL_NUM_SAP);
-	if (local_ssap == LLCP_LOCAL_NUM_SAP) {
-		mutex_unlock(&local->sdp_lock);
-		return LLCP_SAP_MAX;
-	}
-
-	set_bit(local_ssap, &local->local_sap);
-
-	mutex_unlock(&local->sdp_lock);
-
-	return local_ssap + LLCP_LOCAL_SAP_OFFSET;
-}
-
-void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap)
-{
-	u8 local_ssap;
-	unsigned long *sdp;
-
-	if (ssap < LLCP_WKS_NUM_SAP) {
-		local_ssap = ssap;
-		sdp = &local->local_wks;
-	} else if (ssap < LLCP_LOCAL_NUM_SAP) {
-		atomic_t *client_cnt;
-
-		local_ssap = ssap - LLCP_WKS_NUM_SAP;
-		sdp = &local->local_sdp;
-		client_cnt = &local->local_sdp_cnt[local_ssap];
-
-		pr_debug("%d clients\n", atomic_read(client_cnt));
-
-		mutex_lock(&local->sdp_lock);
-
-		if (atomic_dec_and_test(client_cnt)) {
-			struct nfc_llcp_sock *l_sock;
-
-			pr_debug("No more clients for SAP %d\n", ssap);
-
-			clear_bit(local_ssap, sdp);
-
-			/* Find the listening sock and set it back to UNBOUND */
-			l_sock = nfc_llcp_sock_get(local, ssap, LLCP_SAP_SDP);
-			if (l_sock) {
-				l_sock->ssap = LLCP_SDP_UNBOUND;
-				nfc_llcp_sock_put(l_sock);
-			}
-		}
-
-		mutex_unlock(&local->sdp_lock);
-
-		return;
-	} else if (ssap < LLCP_MAX_SAP) {
-		local_ssap = ssap - LLCP_LOCAL_NUM_SAP;
-		sdp = &local->local_sap;
-	} else {
-		return;
-	}
-
-	mutex_lock(&local->sdp_lock);
-
-	clear_bit(local_ssap, sdp);
-
-	mutex_unlock(&local->sdp_lock);
-}
-
-static u8 nfc_llcp_reserve_sdp_ssap(struct nfc_llcp_local *local)
-{
-	u8 ssap;
-
-	mutex_lock(&local->sdp_lock);
-
-	ssap = find_first_zero_bit(&local->local_sdp, LLCP_SDP_NUM_SAP);
-	if (ssap == LLCP_SDP_NUM_SAP) {
-		mutex_unlock(&local->sdp_lock);
-
-		return LLCP_SAP_MAX;
-	}
-
-	pr_debug("SDP ssap %d\n", LLCP_WKS_NUM_SAP + ssap);
-
-	set_bit(ssap, &local->local_sdp);
-
-	mutex_unlock(&local->sdp_lock);
-
-	return LLCP_WKS_NUM_SAP + ssap;
-}
-
-static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
-{
-	u8 *gb_cur, *version_tlv, version, version_length;
-	u8 *lto_tlv, lto_length;
-	u8 *wks_tlv, wks_length;
-	u8 *miux_tlv, miux_length;
-	u8 gb_len = 0;
-	int ret = 0;
-
-	version = LLCP_VERSION_11;
-	version_tlv = nfc_llcp_build_tlv(LLCP_TLV_VERSION, &version,
-					 1, &version_length);
-	gb_len += version_length;
-
-	lto_tlv = nfc_llcp_build_tlv(LLCP_TLV_LTO, &local->lto, 1, &lto_length);
-	gb_len += lto_length;
-
-	pr_debug("Local wks 0x%lx\n", local->local_wks);
-	wks_tlv = nfc_llcp_build_tlv(LLCP_TLV_WKS, (u8 *)&local->local_wks, 2,
-				     &wks_length);
-	gb_len += wks_length;
-
-	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&local->miux, 0,
-				      &miux_length);
-	gb_len += miux_length;
-
-	gb_len += ARRAY_SIZE(llcp_magic);
-
-	if (gb_len > NFC_MAX_GT_LEN) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	gb_cur = local->gb;
-
-	memcpy(gb_cur, llcp_magic, ARRAY_SIZE(llcp_magic));
-	gb_cur += ARRAY_SIZE(llcp_magic);
-
-	memcpy(gb_cur, version_tlv, version_length);
-	gb_cur += version_length;
-
-	memcpy(gb_cur, lto_tlv, lto_length);
-	gb_cur += lto_length;
-
-	memcpy(gb_cur, wks_tlv, wks_length);
-	gb_cur += wks_length;
-
-	memcpy(gb_cur, miux_tlv, miux_length);
-	gb_cur += miux_length;
-
-	local->gb_len = gb_len;
-
-out:
-	kfree(version_tlv);
-	kfree(lto_tlv);
-	kfree(wks_tlv);
-	kfree(miux_tlv);
-
-	return ret;
-}
-
-u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len)
-{
-	struct nfc_llcp_local *local;
-
-	local = nfc_llcp_find_local(dev);
-	if (local == NULL) {
-		*general_bytes_len = 0;
-		return NULL;
-	}
-
-	nfc_llcp_build_gb(local);
-
-	*general_bytes_len = local->gb_len;
-
-	return local->gb;
-}
-
-int nfc_llcp_set_remote_gb(struct nfc_dev *dev, u8 *gb, u8 gb_len)
-{
-	struct nfc_llcp_local *local = nfc_llcp_find_local(dev);
-
-	if (local == NULL) {
-		pr_err("No LLCP device\n");
-		return -ENODEV;
-	}
-	if (gb_len < 3)
-		return -EINVAL;
-
-	memset(local->remote_gb, 0, NFC_MAX_GT_LEN);
-	memcpy(local->remote_gb, gb, gb_len);
-	local->remote_gb_len = gb_len;
-
-	if (memcmp(local->remote_gb, llcp_magic, 3)) {
-		pr_err("MAC does not support LLCP\n");
-		return -EINVAL;
-	}
-
-	return nfc_llcp_parse_gb_tlv(local,
-				     &local->remote_gb[3],
-				     local->remote_gb_len - 3);
-}
-
-static u8 nfc_llcp_dsap(struct sk_buff *pdu)
-{
-	return (pdu->data[0] & 0xfc) >> 2;
-}
-
-static u8 nfc_llcp_ptype(struct sk_buff *pdu)
-{
-	return ((pdu->data[0] & 0x03) << 2) | ((pdu->data[1] & 0xc0) >> 6);
-}
-
-static u8 nfc_llcp_ssap(struct sk_buff *pdu)
-{
-	return pdu->data[1] & 0x3f;
-}
-
-static u8 nfc_llcp_ns(struct sk_buff *pdu)
-{
-	return pdu->data[2] >> 4;
-}
-
-static u8 nfc_llcp_nr(struct sk_buff *pdu)
-{
-	return pdu->data[2] & 0xf;
-}
-
-static void nfc_llcp_set_nrns(struct nfc_llcp_sock *sock, struct sk_buff *pdu)
-{
-	pdu->data[2] = (sock->send_n << 4) | (sock->recv_n);
-	sock->send_n = (sock->send_n + 1) % 16;
-	sock->recv_ack_n = (sock->recv_n - 1) % 16;
-}
-
-void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
-			       struct sk_buff *skb, u8 direction)
-{
-	struct sk_buff *skb_copy = NULL, *nskb;
-	struct sock *sk;
-	u8 *data;
-
-	read_lock(&local->raw_sockets.lock);
-
-	sk_for_each(sk, &local->raw_sockets.head) {
-		if (sk->sk_state != LLCP_BOUND)
-			continue;
-
-		if (skb_copy == NULL) {
-			skb_copy = __pskb_copy(skb, NFC_LLCP_RAW_HEADER_SIZE,
-					       GFP_ATOMIC);
-
-			if (skb_copy == NULL)
-				continue;
-
-			data = skb_push(skb_copy, NFC_LLCP_RAW_HEADER_SIZE);
-
-			data[0] = local->dev ? local->dev->idx : 0xFF;
-			data[1] = direction;
-		}
-
-		nskb = skb_clone(skb_copy, GFP_ATOMIC);
-		if (!nskb)
-			continue;
-
-		if (sock_queue_rcv_skb(sk, nskb))
-			kfree_skb(nskb);
-	}
-
-	read_unlock(&local->raw_sockets.lock);
-
-	kfree_skb(skb_copy);
-}
-
-static void nfc_llcp_tx_work(struct work_struct *work)
-{
-	struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
-						    tx_work);
-	struct sk_buff *skb;
-	struct sock *sk;
-	struct nfc_llcp_sock *llcp_sock;
-
-	skb = skb_dequeue(&local->tx_queue);
-	if (skb != NULL) {
-		sk = skb->sk;
-		llcp_sock = nfc_llcp_sock(sk);
-
-		if (llcp_sock == NULL && nfc_llcp_ptype(skb) == LLCP_PDU_I) {
-			nfc_llcp_send_symm(local->dev);
-		} else {
-			struct sk_buff *copy_skb = NULL;
-			u8 ptype = nfc_llcp_ptype(skb);
-			int ret;
-
-			pr_debug("Sending pending skb\n");
-			print_hex_dump(KERN_DEBUG, "LLCP Tx: ",
-				       DUMP_PREFIX_OFFSET, 16, 1,
-				       skb->data, skb->len, true);
-
-			if (ptype == LLCP_PDU_I)
-				copy_skb = skb_copy(skb, GFP_ATOMIC);
-
-			__net_timestamp(skb);
-
-			nfc_llcp_send_to_raw_sock(local, skb,
-						  NFC_LLCP_DIRECTION_TX);
-
-			ret = nfc_data_exchange(local->dev, local->target_idx,
-						skb, nfc_llcp_recv, local);
-
-			if (ret) {
-				kfree_skb(copy_skb);
-				goto out;
-			}
-
-			if (ptype == LLCP_PDU_I && copy_skb)
-				skb_queue_tail(&llcp_sock->tx_pending_queue,
-					       copy_skb);
-		}
-	} else {
-		nfc_llcp_send_symm(local->dev);
-	}
-
-out:
-	mod_timer(&local->link_timer,
-		  jiffies + msecs_to_jiffies(2 * local->remote_lto));
-}
-
-static struct nfc_llcp_sock *nfc_llcp_connecting_sock_get(struct nfc_llcp_local *local,
-							  u8 ssap)
-{
-	struct sock *sk;
-	struct nfc_llcp_sock *llcp_sock;
-
-	read_lock(&local->connecting_sockets.lock);
-
-	sk_for_each(sk, &local->connecting_sockets.head) {
-		llcp_sock = nfc_llcp_sock(sk);
-
-		if (llcp_sock->ssap == ssap) {
-			sock_hold(&llcp_sock->sk);
-			goto out;
-		}
-	}
-
-	llcp_sock = NULL;
-
-out:
-	read_unlock(&local->connecting_sockets.lock);
-
-	return llcp_sock;
-}
-
-static struct nfc_llcp_sock *nfc_llcp_sock_get_sn(struct nfc_llcp_local *local,
-						  u8 *sn, size_t sn_len)
-{
-	struct nfc_llcp_sock *llcp_sock;
-
-	llcp_sock = nfc_llcp_sock_from_sn(local, sn, sn_len);
-
-	if (llcp_sock == NULL)
-		return NULL;
-
-	sock_hold(&llcp_sock->sk);
-
-	return llcp_sock;
-}
-
-static u8 *nfc_llcp_connect_sn(struct sk_buff *skb, size_t *sn_len)
-{
-	u8 *tlv = &skb->data[2], type, length;
-	size_t tlv_array_len = skb->len - LLCP_HEADER_SIZE, offset = 0;
-
-	while (offset < tlv_array_len) {
-		type = tlv[0];
-		length = tlv[1];
-
-		pr_debug("type 0x%x length %d\n", type, length);
-
-		if (type == LLCP_TLV_SN) {
-			*sn_len = length;
-			return &tlv[2];
-		}
-
-		offset += length + 2;
-		tlv += length + 2;
-	}
-
-	return NULL;
-}
-
-static void nfc_llcp_recv_ui(struct nfc_llcp_local *local,
-			     struct sk_buff *skb)
-{
-	struct nfc_llcp_sock *llcp_sock;
-	struct nfc_llcp_ui_cb *ui_cb;
-	u8 dsap, ssap;
-
-	dsap = nfc_llcp_dsap(skb);
-	ssap = nfc_llcp_ssap(skb);
-
-	ui_cb = nfc_llcp_ui_skb_cb(skb);
-	ui_cb->dsap = dsap;
-	ui_cb->ssap = ssap;
-
-	pr_debug("%d %d\n", dsap, ssap);
-
-	/* We're looking for a bound socket, not a client one */
-	llcp_sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP);
-	if (llcp_sock == NULL || llcp_sock->sk.sk_type != SOCK_DGRAM)
-		return;
-
-	/* There is no sequence with UI frames */
-	skb_pull(skb, LLCP_HEADER_SIZE);
-	if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
-		/*
-		 * UI frames will be freed from the socket layer, so we
-		 * need to keep them alive until someone receives them.
-		 */
-		skb_get(skb);
-	} else {
-		pr_err("Receive queue is full\n");
-	}
-
-	nfc_llcp_sock_put(llcp_sock);
-}
-
-static void nfc_llcp_recv_connect(struct nfc_llcp_local *local,
-				  struct sk_buff *skb)
-{
-	struct sock *new_sk, *parent;
-	struct nfc_llcp_sock *sock, *new_sock;
-	u8 dsap, ssap, reason;
-
-	dsap = nfc_llcp_dsap(skb);
-	ssap = nfc_llcp_ssap(skb);
-
-	pr_debug("%d %d\n", dsap, ssap);
-
-	if (dsap != LLCP_SAP_SDP) {
-		sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP);
-		if (sock == NULL || sock->sk.sk_state != LLCP_LISTEN) {
-			reason = LLCP_DM_NOBOUND;
-			goto fail;
-		}
-	} else {
-		u8 *sn;
-		size_t sn_len;
-
-		sn = nfc_llcp_connect_sn(skb, &sn_len);
-		if (sn == NULL) {
-			reason = LLCP_DM_NOBOUND;
-			goto fail;
-		}
-
-		pr_debug("Service name length %zu\n", sn_len);
-
-		sock = nfc_llcp_sock_get_sn(local, sn, sn_len);
-		if (sock == NULL) {
-			reason = LLCP_DM_NOBOUND;
-			goto fail;
-		}
-	}
-
-	lock_sock(&sock->sk);
-
-	parent = &sock->sk;
-
-	if (sk_acceptq_is_full(parent)) {
-		reason = LLCP_DM_REJ;
-		release_sock(&sock->sk);
-		sock_put(&sock->sk);
-		goto fail;
-	}
-
-	if (sock->ssap == LLCP_SDP_UNBOUND) {
-		u8 ssap = nfc_llcp_reserve_sdp_ssap(local);
-
-		pr_debug("First client, reserving %d\n", ssap);
-
-		if (ssap == LLCP_SAP_MAX) {
-			reason = LLCP_DM_REJ;
-			release_sock(&sock->sk);
-			sock_put(&sock->sk);
-			goto fail;
-		}
-
-		sock->ssap = ssap;
-	}
-
-	new_sk = nfc_llcp_sock_alloc(NULL, parent->sk_type, GFP_ATOMIC);
-	if (new_sk == NULL) {
-		reason = LLCP_DM_REJ;
-		release_sock(&sock->sk);
-		sock_put(&sock->sk);
-		goto fail;
-	}
-
-	new_sock = nfc_llcp_sock(new_sk);
-	new_sock->dev = local->dev;
-	new_sock->local = nfc_llcp_local_get(local);
-	new_sock->rw = sock->rw;
-	new_sock->miux = sock->miux;
-	new_sock->remote_miu = local->remote_miu;
-	new_sock->nfc_protocol = sock->nfc_protocol;
-	new_sock->dsap = ssap;
-	new_sock->target_idx = local->target_idx;
-	new_sock->parent = parent;
-	new_sock->ssap = sock->ssap;
-	if (sock->ssap < LLCP_LOCAL_NUM_SAP && sock->ssap >= LLCP_WKS_NUM_SAP) {
-		atomic_t *client_count;
-
-		pr_debug("reserved_ssap %d for %p\n", sock->ssap, new_sock);
-
-		client_count =
-			&local->local_sdp_cnt[sock->ssap - LLCP_WKS_NUM_SAP];
-
-		atomic_inc(client_count);
-		new_sock->reserved_ssap = sock->ssap;
-	}
-
-	nfc_llcp_parse_connection_tlv(new_sock, &skb->data[LLCP_HEADER_SIZE],
-				      skb->len - LLCP_HEADER_SIZE);
-
-	pr_debug("new sock %p sk %p\n", new_sock, &new_sock->sk);
-
-	nfc_llcp_sock_link(&local->sockets, new_sk);
-
-	nfc_llcp_accept_enqueue(&sock->sk, new_sk);
-
-	nfc_get_device(local->dev->idx);
-
-	new_sk->sk_state = LLCP_CONNECTED;
-
-	/* Wake the listening processes */
-	parent->sk_data_ready(parent, 0);
-
-	/* Send CC */
-	nfc_llcp_send_cc(new_sock);
-
-	release_sock(&sock->sk);
-	sock_put(&sock->sk);
-
-	return;
-
-fail:
-	/* Send DM */
-	nfc_llcp_send_dm(local, dsap, ssap, reason);
-}
-
-int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock)
-{
-	int nr_frames = 0;
-	struct nfc_llcp_local *local = sock->local;
-
-	pr_debug("Remote ready %d tx queue len %d remote rw %d",
-		 sock->remote_ready, skb_queue_len(&sock->tx_pending_queue),
-		 sock->remote_rw);
-
-	/* Try to queue some I frames for transmission */
-	while (sock->remote_ready &&
-	       skb_queue_len(&sock->tx_pending_queue) < sock->remote_rw) {
-		struct sk_buff *pdu;
-
-		pdu = skb_dequeue(&sock->tx_queue);
-		if (pdu == NULL)
-			break;
-
-		/* Update N(S)/N(R) */
-		nfc_llcp_set_nrns(sock, pdu);
-
-		skb_queue_tail(&local->tx_queue, pdu);
-		nr_frames++;
-	}
-
-	return nr_frames;
-}
-
-static void nfc_llcp_recv_hdlc(struct nfc_llcp_local *local,
-			       struct sk_buff *skb)
-{
-	struct nfc_llcp_sock *llcp_sock;
-	struct sock *sk;
-	u8 dsap, ssap, ptype, ns, nr;
-
-	ptype = nfc_llcp_ptype(skb);
-	dsap = nfc_llcp_dsap(skb);
-	ssap = nfc_llcp_ssap(skb);
-	ns = nfc_llcp_ns(skb);
-	nr = nfc_llcp_nr(skb);
-
-	pr_debug("%d %d R %d S %d\n", dsap, ssap, nr, ns);
-
-	llcp_sock = nfc_llcp_sock_get(local, dsap, ssap);
-	if (llcp_sock == NULL) {
-		nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN);
-		return;
-	}
-
-	sk = &llcp_sock->sk;
-	lock_sock(sk);
-	if (sk->sk_state == LLCP_CLOSED) {
-		release_sock(sk);
-		nfc_llcp_sock_put(llcp_sock);
-	}
-
-	/* Pass the payload upstream */
-	if (ptype == LLCP_PDU_I) {
-		pr_debug("I frame, queueing on %p\n", &llcp_sock->sk);
-
-		if (ns == llcp_sock->recv_n)
-			llcp_sock->recv_n = (llcp_sock->recv_n + 1) % 16;
-		else
-			pr_err("Received out of sequence I PDU\n");
-
-		skb_pull(skb, LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE);
-		if (!sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
-			/*
-			 * I frames will be freed from the socket layer, so we
-			 * need to keep them alive until someone receives them.
-			 */
-			skb_get(skb);
-		} else {
-			pr_err("Receive queue is full\n");
-		}
-	}
-
-	/* Remove skbs from the pending queue */
-	if (llcp_sock->send_ack_n != nr) {
-		struct sk_buff *s, *tmp;
-		u8 n;
-
-		llcp_sock->send_ack_n = nr;
-
-		/* Remove and free all skbs until ns == nr */
-		skb_queue_walk_safe(&llcp_sock->tx_pending_queue, s, tmp) {
-			n = nfc_llcp_ns(s);
-
-			skb_unlink(s, &llcp_sock->tx_pending_queue);
-			kfree_skb(s);
-
-			if (n == nr)
-				break;
-		}
-
-		/* Re-queue the remaining skbs for transmission */
-		skb_queue_reverse_walk_safe(&llcp_sock->tx_pending_queue,
-					    s, tmp) {
-			skb_unlink(s, &llcp_sock->tx_pending_queue);
-			skb_queue_head(&local->tx_queue, s);
-		}
-	}
-
-	if (ptype == LLCP_PDU_RR)
-		llcp_sock->remote_ready = true;
-	else if (ptype == LLCP_PDU_RNR)
-		llcp_sock->remote_ready = false;
-
-	if (nfc_llcp_queue_i_frames(llcp_sock) == 0 && ptype == LLCP_PDU_I)
-		nfc_llcp_send_rr(llcp_sock);
-
-	release_sock(sk);
-	nfc_llcp_sock_put(llcp_sock);
-}
-
-static void nfc_llcp_recv_disc(struct nfc_llcp_local *local,
-			       struct sk_buff *skb)
-{
-	struct nfc_llcp_sock *llcp_sock;
-	struct sock *sk;
-	u8 dsap, ssap;
-
-	dsap = nfc_llcp_dsap(skb);
-	ssap = nfc_llcp_ssap(skb);
-
-	if ((dsap == 0) && (ssap == 0)) {
-		pr_debug("Connection termination");
-		nfc_dep_link_down(local->dev);
-		return;
-	}
-
-	llcp_sock = nfc_llcp_sock_get(local, dsap, ssap);
-	if (llcp_sock == NULL) {
-		nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN);
-		return;
-	}
-
-	sk = &llcp_sock->sk;
-	lock_sock(sk);
-
-	nfc_llcp_socket_purge(llcp_sock);
-
-	if (sk->sk_state == LLCP_CLOSED) {
-		release_sock(sk);
-		nfc_llcp_sock_put(llcp_sock);
-	}
-
-	if (sk->sk_state == LLCP_CONNECTED) {
-		nfc_put_device(local->dev);
-		sk->sk_state = LLCP_CLOSED;
-		sk->sk_state_change(sk);
-	}
-
-	nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_DISC);
-
-	release_sock(sk);
-	nfc_llcp_sock_put(llcp_sock);
-}
-
-static void nfc_llcp_recv_cc(struct nfc_llcp_local *local, struct sk_buff *skb)
-{
-	struct nfc_llcp_sock *llcp_sock;
-	struct sock *sk;
-	u8 dsap, ssap;
-
-	dsap = nfc_llcp_dsap(skb);
-	ssap = nfc_llcp_ssap(skb);
-
-	llcp_sock = nfc_llcp_connecting_sock_get(local, dsap);
-	if (llcp_sock == NULL) {
-		pr_err("Invalid CC\n");
-		nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN);
-
-		return;
-	}
-
-	sk = &llcp_sock->sk;
-
-	/* Unlink from connecting and link to the client array */
-	nfc_llcp_sock_unlink(&local->connecting_sockets, sk);
-	nfc_llcp_sock_link(&local->sockets, sk);
-	llcp_sock->dsap = ssap;
-
-	nfc_llcp_parse_connection_tlv(llcp_sock, &skb->data[LLCP_HEADER_SIZE],
-				      skb->len - LLCP_HEADER_SIZE);
-
-	sk->sk_state = LLCP_CONNECTED;
-	sk->sk_state_change(sk);
-
-	nfc_llcp_sock_put(llcp_sock);
-}
-
-static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb)
-{
-	struct nfc_llcp_sock *llcp_sock;
-	struct sock *sk;
-	u8 dsap, ssap, reason;
-
-	dsap = nfc_llcp_dsap(skb);
-	ssap = nfc_llcp_ssap(skb);
-	reason = skb->data[2];
-
-	pr_debug("%d %d reason %d\n", ssap, dsap, reason);
-
-	switch (reason) {
-	case LLCP_DM_NOBOUND:
-	case LLCP_DM_REJ:
-		llcp_sock = nfc_llcp_connecting_sock_get(local, dsap);
-		break;
-
-	default:
-		llcp_sock = nfc_llcp_sock_get(local, dsap, ssap);
-		break;
-	}
-
-	if (llcp_sock == NULL) {
-		pr_debug("Already closed\n");
-		return;
-	}
-
-	sk = &llcp_sock->sk;
-
-	sk->sk_err = ENXIO;
-	sk->sk_state = LLCP_CLOSED;
-	sk->sk_state_change(sk);
-
-	nfc_llcp_sock_put(llcp_sock);
-}
-
-static void nfc_llcp_recv_snl(struct nfc_llcp_local *local,
-			      struct sk_buff *skb)
-{
-	struct nfc_llcp_sock *llcp_sock;
-	u8 dsap, ssap, *tlv, type, length, tid, sap;
-	u16 tlv_len, offset;
-	char *service_name;
-	size_t service_name_len;
-	struct nfc_llcp_sdp_tlv *sdp;
-	HLIST_HEAD(llc_sdres_list);
-	size_t sdres_tlvs_len;
-	HLIST_HEAD(nl_sdres_list);
-
-	dsap = nfc_llcp_dsap(skb);
-	ssap = nfc_llcp_ssap(skb);
-
-	pr_debug("%d %d\n", dsap, ssap);
-
-	if (dsap != LLCP_SAP_SDP || ssap != LLCP_SAP_SDP) {
-		pr_err("Wrong SNL SAP\n");
-		return;
-	}
-
-	tlv = &skb->data[LLCP_HEADER_SIZE];
-	tlv_len = skb->len - LLCP_HEADER_SIZE;
-	offset = 0;
-	sdres_tlvs_len = 0;
-
-	while (offset < tlv_len) {
-		type = tlv[0];
-		length = tlv[1];
-
-		switch (type) {
-		case LLCP_TLV_SDREQ:
-			tid = tlv[2];
-			service_name = (char *) &tlv[3];
-			service_name_len = length - 1;
-
-			pr_debug("Looking for %.16s\n", service_name);
-
-			if (service_name_len == strlen("urn:nfc:sn:sdp") &&
-			    !strncmp(service_name, "urn:nfc:sn:sdp",
-				     service_name_len)) {
-				sap = 1;
-				goto add_snl;
-			}
-
-			llcp_sock = nfc_llcp_sock_from_sn(local, service_name,
-							  service_name_len);
-			if (!llcp_sock) {
-				sap = 0;
-				goto add_snl;
-			}
-
-			/*
-			 * We found a socket but its ssap has not been reserved
-			 * yet. We need to assign it for good and send a reply.
-			 * The ssap will be freed when the socket is closed.
-			 */
-			if (llcp_sock->ssap == LLCP_SDP_UNBOUND) {
-				atomic_t *client_count;
-
-				sap = nfc_llcp_reserve_sdp_ssap(local);
-
-				pr_debug("Reserving %d\n", sap);
-
-				if (sap == LLCP_SAP_MAX) {
-					sap = 0;
-					goto add_snl;
-				}
-
-				client_count =
-					&local->local_sdp_cnt[sap -
-							      LLCP_WKS_NUM_SAP];
-
-				atomic_inc(client_count);
-
-				llcp_sock->ssap = sap;
-				llcp_sock->reserved_ssap = sap;
-			} else {
-				sap = llcp_sock->ssap;
-			}
-
-			pr_debug("%p %d\n", llcp_sock, sap);
-
-add_snl:
-			sdp = nfc_llcp_build_sdres_tlv(tid, sap);
-			if (sdp == NULL)
-				goto exit;
-
-			sdres_tlvs_len += sdp->tlv_len;
-			hlist_add_head(&sdp->node, &llc_sdres_list);
-			break;
-
-		case LLCP_TLV_SDRES:
-			mutex_lock(&local->sdreq_lock);
-
-			pr_debug("LLCP_TLV_SDRES: searching tid %d\n", tlv[2]);
-
-			hlist_for_each_entry(sdp, &local->pending_sdreqs, node) {
-				if (sdp->tid != tlv[2])
-					continue;
-
-				sdp->sap = tlv[3];
-
-				pr_debug("Found: uri=%s, sap=%d\n",
-					 sdp->uri, sdp->sap);
-
-				hlist_del(&sdp->node);
-
-				hlist_add_head(&sdp->node, &nl_sdres_list);
-
-				break;
-			}
-
-			mutex_unlock(&local->sdreq_lock);
-			break;
-
-		default:
-			pr_err("Invalid SNL tlv value 0x%x\n", type);
-			break;
-		}
-
-		offset += length + 2;
-		tlv += length + 2;
-	}
-
-exit:
-	if (!hlist_empty(&nl_sdres_list))
-		nfc_genl_llc_send_sdres(local->dev, &nl_sdres_list);
-
-	if (!hlist_empty(&llc_sdres_list))
-		nfc_llcp_send_snl_sdres(local, &llc_sdres_list, sdres_tlvs_len);
-}
-
-static void nfc_llcp_recv_agf(struct nfc_llcp_local *local, struct sk_buff *skb)
-{
-	u8 ptype;
-	u16 pdu_len;
-	struct sk_buff *new_skb;
-
-	if (skb->len <= LLCP_HEADER_SIZE) {
-		pr_err("Malformed AGF PDU\n");
-		return;
-	}
-
-	skb_pull(skb, LLCP_HEADER_SIZE);
-
-	while (skb->len > LLCP_AGF_PDU_HEADER_SIZE) {
-		pdu_len = skb->data[0] << 8 | skb->data[1];
-
-		skb_pull(skb, LLCP_AGF_PDU_HEADER_SIZE);
-
-		if (pdu_len < LLCP_HEADER_SIZE || pdu_len > skb->len) {
-			pr_err("Malformed AGF PDU\n");
-			return;
-		}
-
-		ptype = nfc_llcp_ptype(skb);
-
-		if (ptype == LLCP_PDU_SYMM || ptype == LLCP_PDU_AGF)
-			goto next;
-
-		new_skb = nfc_alloc_recv_skb(pdu_len, GFP_KERNEL);
-		if (new_skb == NULL) {
-			pr_err("Could not allocate PDU\n");
-			return;
-		}
-
-		memcpy(skb_put(new_skb, pdu_len), skb->data, pdu_len);
-
-		nfc_llcp_rx_skb(local, new_skb);
-
-		kfree_skb(new_skb);
-next:
-		skb_pull(skb, pdu_len);
-	}
-}
-
-static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb)
-{
-	u8 dsap, ssap, ptype;
-
-	ptype = nfc_llcp_ptype(skb);
-	dsap = nfc_llcp_dsap(skb);
-	ssap = nfc_llcp_ssap(skb);
-
-	pr_debug("ptype 0x%x dsap 0x%x ssap 0x%x\n", ptype, dsap, ssap);
-
-	if (ptype != LLCP_PDU_SYMM)
-		print_hex_dump(KERN_DEBUG, "LLCP Rx: ", DUMP_PREFIX_OFFSET,
-			       16, 1, skb->data, skb->len, true);
-
-	switch (ptype) {
-	case LLCP_PDU_SYMM:
-		pr_debug("SYMM\n");
-		break;
-
-	case LLCP_PDU_UI:
-		pr_debug("UI\n");
-		nfc_llcp_recv_ui(local, skb);
-		break;
-
-	case LLCP_PDU_CONNECT:
-		pr_debug("CONNECT\n");
-		nfc_llcp_recv_connect(local, skb);
-		break;
-
-	case LLCP_PDU_DISC:
-		pr_debug("DISC\n");
-		nfc_llcp_recv_disc(local, skb);
-		break;
-
-	case LLCP_PDU_CC:
-		pr_debug("CC\n");
-		nfc_llcp_recv_cc(local, skb);
-		break;
-
-	case LLCP_PDU_DM:
-		pr_debug("DM\n");
-		nfc_llcp_recv_dm(local, skb);
-		break;
-
-	case LLCP_PDU_SNL:
-		pr_debug("SNL\n");
-		nfc_llcp_recv_snl(local, skb);
-		break;
-
-	case LLCP_PDU_I:
-	case LLCP_PDU_RR:
-	case LLCP_PDU_RNR:
-		pr_debug("I frame\n");
-		nfc_llcp_recv_hdlc(local, skb);
-		break;
-
-	case LLCP_PDU_AGF:
-		pr_debug("AGF frame\n");
-		nfc_llcp_recv_agf(local, skb);
-		break;
-	}
-}
-
-static void nfc_llcp_rx_work(struct work_struct *work)
-{
-	struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
-						    rx_work);
-	struct sk_buff *skb;
-
-	skb = local->rx_pending;
-	if (skb == NULL) {
-		pr_debug("No pending SKB\n");
-		return;
-	}
-
-	__net_timestamp(skb);
-
-	nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX);
-
-	nfc_llcp_rx_skb(local, skb);
-
-	schedule_work(&local->tx_work);
-	kfree_skb(local->rx_pending);
-	local->rx_pending = NULL;
-}
-
-static void __nfc_llcp_recv(struct nfc_llcp_local *local, struct sk_buff *skb)
-{
-	local->rx_pending = skb;
-	del_timer(&local->link_timer);
-	schedule_work(&local->rx_work);
-}
-
-void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
-{
-	struct nfc_llcp_local *local = (struct nfc_llcp_local *) data;
-
-	pr_debug("Received an LLCP PDU\n");
-	if (err < 0) {
-		pr_err("err %d\n", err);
-		return;
-	}
-
-	__nfc_llcp_recv(local, skb);
-}
-
-int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb)
-{
-	struct nfc_llcp_local *local;
-
-	local = nfc_llcp_find_local(dev);
-	if (local == NULL)
-		return -ENODEV;
-
-	__nfc_llcp_recv(local, skb);
-
-	return 0;
-}
-
-void nfc_llcp_mac_is_down(struct nfc_dev *dev)
-{
-	struct nfc_llcp_local *local;
-
-	local = nfc_llcp_find_local(dev);
-	if (local == NULL)
-		return;
-
-	local->remote_miu = LLCP_DEFAULT_MIU;
-	local->remote_lto = LLCP_DEFAULT_LTO;
-
-	/* Close and purge all existing sockets */
-	nfc_llcp_socket_release(local, true, 0);
-}
-
-void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
-			u8 comm_mode, u8 rf_mode)
-{
-	struct nfc_llcp_local *local;
-
-	pr_debug("rf mode %d\n", rf_mode);
-
-	local = nfc_llcp_find_local(dev);
-	if (local == NULL)
-		return;
-
-	local->target_idx = target_idx;
-	local->comm_mode = comm_mode;
-	local->rf_mode = rf_mode;
-
-	if (rf_mode == NFC_RF_INITIATOR) {
-		pr_debug("Queueing Tx work\n");
-
-		schedule_work(&local->tx_work);
-	} else {
-		mod_timer(&local->link_timer,
-			  jiffies + msecs_to_jiffies(local->remote_lto));
-	}
-}
-
-int nfc_llcp_register_device(struct nfc_dev *ndev)
-{
-	struct nfc_llcp_local *local;
-
-	local = kzalloc(sizeof(struct nfc_llcp_local), GFP_KERNEL);
-	if (local == NULL)
-		return -ENOMEM;
-
-	local->dev = ndev;
-	INIT_LIST_HEAD(&local->list);
-	kref_init(&local->ref);
-	mutex_init(&local->sdp_lock);
-	init_timer(&local->link_timer);
-	local->link_timer.data = (unsigned long) local;
-	local->link_timer.function = nfc_llcp_symm_timer;
-
-	skb_queue_head_init(&local->tx_queue);
-	INIT_WORK(&local->tx_work, nfc_llcp_tx_work);
-
-	local->rx_pending = NULL;
-	INIT_WORK(&local->rx_work, nfc_llcp_rx_work);
-
-	INIT_WORK(&local->timeout_work, nfc_llcp_timeout_work);
-
-	rwlock_init(&local->sockets.lock);
-	rwlock_init(&local->connecting_sockets.lock);
-	rwlock_init(&local->raw_sockets.lock);
-
-	local->lto = 150; /* 1500 ms */
-	local->rw = LLCP_MAX_RW;
-	local->miux = cpu_to_be16(LLCP_MAX_MIUX);
-
-	nfc_llcp_build_gb(local);
-
-	local->remote_miu = LLCP_DEFAULT_MIU;
-	local->remote_lto = LLCP_DEFAULT_LTO;
-
-	mutex_init(&local->sdreq_lock);
-	INIT_HLIST_HEAD(&local->pending_sdreqs);
-	init_timer(&local->sdreq_timer);
-	local->sdreq_timer.data = (unsigned long) local;
-	local->sdreq_timer.function = nfc_llcp_sdreq_timer;
-	INIT_WORK(&local->sdreq_timeout_work, nfc_llcp_sdreq_timeout_work);
-
-	list_add(&local->list, &llcp_devices);
-
-	return 0;
-}
-
-void nfc_llcp_unregister_device(struct nfc_dev *dev)
-{
-	struct nfc_llcp_local *local = nfc_llcp_find_local(dev);
-
-	if (local == NULL) {
-		pr_debug("No such device\n");
-		return;
-	}
-
-	local_cleanup(local);
-
-	nfc_llcp_local_put(local);
-}
-
-int __init nfc_llcp_init(void)
-{
-	INIT_LIST_HEAD(&llcp_devices);
-
-	return nfc_llcp_sock_init();
-}
-
-void nfc_llcp_exit(void)
-{
-	nfc_llcp_sock_exit();
-}