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, 817 deletions

diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
deleted file mode 100644
index 094f7e27e91..00000000000
--- a/net/nfc/llcp/commands.c
+++ /dev/null
@@ -1,817 +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/module.h>
-#include <linux/nfc.h>
-
-#include <net/nfc/nfc.h>
-
-#include "../nfc.h"
-#include "llcp.h"
-
-static u8 llcp_tlv_length[LLCP_TLV_MAX] = {
-	0,
-	1, /* VERSION */
-	2, /* MIUX */
-	2, /* WKS */
-	1, /* LTO */
-	1, /* RW */
-	0, /* SN */
-	1, /* OPT */
-	0, /* SDREQ */
-	2, /* SDRES */
-
-};
-
-static u8 llcp_tlv8(u8 *tlv, u8 type)
-{
-	if (tlv[0] != type || tlv[1] != llcp_tlv_length[tlv[0]])
-		return 0;
-
-	return tlv[2];
-}
-
-static u16 llcp_tlv16(u8 *tlv, u8 type)
-{
-	if (tlv[0] != type || tlv[1] != llcp_tlv_length[tlv[0]])
-		return 0;
-
-	return be16_to_cpu(*((__be16 *)(tlv + 2)));
-}
-
-
-static u8 llcp_tlv_version(u8 *tlv)
-{
-	return llcp_tlv8(tlv, LLCP_TLV_VERSION);
-}
-
-static u16 llcp_tlv_miux(u8 *tlv)
-{
-	return llcp_tlv16(tlv, LLCP_TLV_MIUX) & 0x7ff;
-}
-
-static u16 llcp_tlv_wks(u8 *tlv)
-{
-	return llcp_tlv16(tlv, LLCP_TLV_WKS);
-}
-
-static u16 llcp_tlv_lto(u8 *tlv)
-{
-	return llcp_tlv8(tlv, LLCP_TLV_LTO);
-}
-
-static u8 llcp_tlv_opt(u8 *tlv)
-{
-	return llcp_tlv8(tlv, LLCP_TLV_OPT);
-}
-
-static u8 llcp_tlv_rw(u8 *tlv)
-{
-	return llcp_tlv8(tlv, LLCP_TLV_RW) & 0xf;
-}
-
-u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length)
-{
-	u8 *tlv, length;
-
-	pr_debug("type %d\n", type);
-
-	if (type >= LLCP_TLV_MAX)
-		return NULL;
-
-	length = llcp_tlv_length[type];
-	if (length == 0 && value_length == 0)
-		return NULL;
-	else if (length == 0)
-		length = value_length;
-
-	*tlv_length = 2 + length;
-	tlv = kzalloc(2 + length, GFP_KERNEL);
-	if (tlv == NULL)
-		return tlv;
-
-	tlv[0] = type;
-	tlv[1] = length;
-	memcpy(tlv + 2, value, length);
-
-	return tlv;
-}
-
-struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap)
-{
-	struct nfc_llcp_sdp_tlv *sdres;
-	u8 value[2];
-
-	sdres = kzalloc(sizeof(struct nfc_llcp_sdp_tlv), GFP_KERNEL);
-	if (sdres == NULL)
-		return NULL;
-
-	value[0] = tid;
-	value[1] = sap;
-
-	sdres->tlv = nfc_llcp_build_tlv(LLCP_TLV_SDRES, value, 2,
-					&sdres->tlv_len);
-	if (sdres->tlv == NULL) {
-		kfree(sdres);
-		return NULL;
-	}
-
-	sdres->tid = tid;
-	sdres->sap = sap;
-
-	INIT_HLIST_NODE(&sdres->node);
-
-	return sdres;
-}
-
-struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri,
-						  size_t uri_len)
-{
-	struct nfc_llcp_sdp_tlv *sdreq;
-
-	pr_debug("uri: %s, len: %zu\n", uri, uri_len);
-
-	sdreq = kzalloc(sizeof(struct nfc_llcp_sdp_tlv), GFP_KERNEL);
-	if (sdreq == NULL)
-		return NULL;
-
-	sdreq->tlv_len = uri_len + 3;
-
-	if (uri[uri_len - 1] == 0)
-		sdreq->tlv_len--;
-
-	sdreq->tlv = kzalloc(sdreq->tlv_len + 1, GFP_KERNEL);
-	if (sdreq->tlv == NULL) {
-		kfree(sdreq);
-		return NULL;
-	}
-
-	sdreq->tlv[0] = LLCP_TLV_SDREQ;
-	sdreq->tlv[1] = sdreq->tlv_len - 2;
-	sdreq->tlv[2] = tid;
-
-	sdreq->tid = tid;
-	sdreq->uri = sdreq->tlv + 3;
-	memcpy(sdreq->uri, uri, uri_len);
-
-	sdreq->time = jiffies;
-
-	INIT_HLIST_NODE(&sdreq->node);
-
-	return sdreq;
-}
-
-void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp)
-{
-	kfree(sdp->tlv);
-	kfree(sdp);
-}
-
-void nfc_llcp_free_sdp_tlv_list(struct hlist_head *head)
-{
-	struct nfc_llcp_sdp_tlv *sdp;
-	struct hlist_node *n;
-
-	hlist_for_each_entry_safe(sdp, n, head, node) {
-		hlist_del(&sdp->node);
-
-		nfc_llcp_free_sdp_tlv(sdp);
-	}
-}
-
-int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local,
-			  u8 *tlv_array, u16 tlv_array_len)
-{
-	u8 *tlv = tlv_array, type, length, offset = 0;
-
-	pr_debug("TLV array length %d\n", tlv_array_len);
-
-	if (local == NULL)
-		return -ENODEV;
-
-	while (offset < tlv_array_len) {
-		type = tlv[0];
-		length = tlv[1];
-
-		pr_debug("type 0x%x length %d\n", type, length);
-
-		switch (type) {
-		case LLCP_TLV_VERSION:
-			local->remote_version = llcp_tlv_version(tlv);
-			break;
-		case LLCP_TLV_MIUX:
-			local->remote_miu = llcp_tlv_miux(tlv) + 128;
-			break;
-		case LLCP_TLV_WKS:
-			local->remote_wks = llcp_tlv_wks(tlv);
-			break;
-		case LLCP_TLV_LTO:
-			local->remote_lto = llcp_tlv_lto(tlv) * 10;
-			break;
-		case LLCP_TLV_OPT:
-			local->remote_opt = llcp_tlv_opt(tlv);
-			break;
-		default:
-			pr_err("Invalid gt tlv value 0x%x\n", type);
-			break;
-		}
-
-		offset += length + 2;
-		tlv += length + 2;
-	}
-
-	pr_debug("version 0x%x miu %d lto %d opt 0x%x wks 0x%x\n",
-		 local->remote_version, local->remote_miu,
-		 local->remote_lto, local->remote_opt,
-		 local->remote_wks);
-
-	return 0;
-}
-
-int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock,
-				  u8 *tlv_array, u16 tlv_array_len)
-{
-	u8 *tlv = tlv_array, type, length, offset = 0;
-
-	pr_debug("TLV array length %d\n", tlv_array_len);
-
-	if (sock == NULL)
-		return -ENOTCONN;
-
-	while (offset < tlv_array_len) {
-		type = tlv[0];
-		length = tlv[1];
-
-		pr_debug("type 0x%x length %d\n", type, length);
-
-		switch (type) {
-		case LLCP_TLV_MIUX:
-			sock->remote_miu = llcp_tlv_miux(tlv) + 128;
-			break;
-		case LLCP_TLV_RW:
-			sock->remote_rw = llcp_tlv_rw(tlv);
-			break;
-		case LLCP_TLV_SN:
-			break;
-		default:
-			pr_err("Invalid gt tlv value 0x%x\n", type);
-			break;
-		}
-
-		offset += length + 2;
-		tlv += length + 2;
-	}
-
-	pr_debug("sock %p rw %d miu %d\n", sock,
-		 sock->remote_rw, sock->remote_miu);
-
-	return 0;
-}
-
-static struct sk_buff *llcp_add_header(struct sk_buff *pdu,
-				       u8 dsap, u8 ssap, u8 ptype)
-{
-	u8 header[2];
-
-	pr_debug("ptype 0x%x dsap 0x%x ssap 0x%x\n", ptype, dsap, ssap);
-
-	header[0] = (u8)((dsap << 2) | (ptype >> 2));
-	header[1] = (u8)((ptype << 6) | ssap);
-
-	pr_debug("header 0x%x 0x%x\n", header[0], header[1]);
-
-	memcpy(skb_put(pdu, LLCP_HEADER_SIZE), header, LLCP_HEADER_SIZE);
-
-	return pdu;
-}
-
-static struct sk_buff *llcp_add_tlv(struct sk_buff *pdu, u8 *tlv,
-				    u8 tlv_length)
-{
-	/* XXX Add an skb length check */
-
-	if (tlv == NULL)
-		return NULL;
-
-	memcpy(skb_put(pdu, tlv_length), tlv, tlv_length);
-
-	return pdu;
-}
-
-static struct sk_buff *llcp_allocate_pdu(struct nfc_llcp_sock *sock,
-					 u8 cmd, u16 size)
-{
-	struct sk_buff *skb;
-	int err;
-
-	if (sock->ssap == 0)
-		return NULL;
-
-	skb = nfc_alloc_send_skb(sock->dev, &sock->sk, MSG_DONTWAIT,
-				 size + LLCP_HEADER_SIZE, &err);
-	if (skb == NULL) {
-		pr_err("Could not allocate PDU\n");
-		return NULL;
-	}
-
-	skb = llcp_add_header(skb, sock->dsap, sock->ssap, cmd);
-
-	return skb;
-}
-
-int nfc_llcp_disconnect(struct nfc_llcp_sock *sock)
-{
-	struct sk_buff *skb;
-	struct nfc_dev *dev;
-	struct nfc_llcp_local *local;
-
-	pr_debug("Sending DISC\n");
-
-	local = sock->local;
-	if (local == NULL)
-		return -ENODEV;
-
-	dev = sock->dev;
-	if (dev == NULL)
-		return -ENODEV;
-
-	skb = llcp_allocate_pdu(sock, LLCP_PDU_DISC, 0);
-	if (skb == NULL)
-		return -ENOMEM;
-
-	skb_queue_tail(&local->tx_queue, skb);
-
-	return 0;
-}
-
-int nfc_llcp_send_symm(struct nfc_dev *dev)
-{
-	struct sk_buff *skb;
-	struct nfc_llcp_local *local;
-	u16 size = 0;
-
-	pr_debug("Sending SYMM\n");
-
-	local = nfc_llcp_find_local(dev);
-	if (local == NULL)
-		return -ENODEV;
-
-	size += LLCP_HEADER_SIZE;
-	size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
-
-	skb = alloc_skb(size, GFP_KERNEL);
-	if (skb == NULL)
-		return -ENOMEM;
-
-	skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
-
-	skb = llcp_add_header(skb, 0, 0, LLCP_PDU_SYMM);
-
-	__net_timestamp(skb);
-
-	nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_TX);
-
-	return nfc_data_exchange(dev, local->target_idx, skb,
-				 nfc_llcp_recv, local);
-}
-
-int nfc_llcp_send_connect(struct nfc_llcp_sock *sock)
-{
-	struct nfc_llcp_local *local;
-	struct sk_buff *skb;
-	u8 *service_name_tlv = NULL, service_name_tlv_length;
-	u8 *miux_tlv = NULL, miux_tlv_length;
-	u8 *rw_tlv = NULL, rw_tlv_length, rw;
-	int err;
-	u16 size = 0, miux;
-
-	pr_debug("Sending CONNECT\n");
-
-	local = sock->local;
-	if (local == NULL)
-		return -ENODEV;
-
-	if (sock->service_name != NULL) {
-		service_name_tlv = nfc_llcp_build_tlv(LLCP_TLV_SN,
-						      sock->service_name,
-						      sock->service_name_len,
-						      &service_name_tlv_length);
-		size += service_name_tlv_length;
-	}
-
-	/* If the socket parameters are not set, use the local ones */
-	miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ?
-		local->miux : sock->miux;
-	rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw;
-
-	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
-				      &miux_tlv_length);
-	size += miux_tlv_length;
-
-	rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
-	size += rw_tlv_length;
-
-	pr_debug("SKB size %d SN length %zu\n", size, sock->service_name_len);
-
-	skb = llcp_allocate_pdu(sock, LLCP_PDU_CONNECT, size);
-	if (skb == NULL) {
-		err = -ENOMEM;
-		goto error_tlv;
-	}
-
-	if (service_name_tlv != NULL)
-		skb = llcp_add_tlv(skb, service_name_tlv,
-				   service_name_tlv_length);
-
-	skb = llcp_add_tlv(skb, miux_tlv, miux_tlv_length);
-	skb = llcp_add_tlv(skb, rw_tlv, rw_tlv_length);
-
-	skb_queue_tail(&local->tx_queue, skb);
-
-	return 0;
-
-error_tlv:
-	pr_err("error %d\n", err);
-
-	kfree(service_name_tlv);
-	kfree(miux_tlv);
-	kfree(rw_tlv);
-
-	return err;
-}
-
-int nfc_llcp_send_cc(struct nfc_llcp_sock *sock)
-{
-	struct nfc_llcp_local *local;
-	struct sk_buff *skb;
-	u8 *miux_tlv = NULL, miux_tlv_length;
-	u8 *rw_tlv = NULL, rw_tlv_length, rw;
-	int err;
-	u16 size = 0, miux;
-
-	pr_debug("Sending CC\n");
-
-	local = sock->local;
-	if (local == NULL)
-		return -ENODEV;
-
-	/* If the socket parameters are not set, use the local ones */
-	miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ?
-		local->miux : sock->miux;
-	rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw;
-
-	miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0,
-				      &miux_tlv_length);
-	size += miux_tlv_length;
-
-	rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length);
-	size += rw_tlv_length;
-
-	skb = llcp_allocate_pdu(sock, LLCP_PDU_CC, size);
-	if (skb == NULL) {
-		err = -ENOMEM;
-		goto error_tlv;
-	}
-
-	skb = llcp_add_tlv(skb, miux_tlv, miux_tlv_length);
-	skb = llcp_add_tlv(skb, rw_tlv, rw_tlv_length);
-
-	skb_queue_tail(&local->tx_queue, skb);
-
-	return 0;
-
-error_tlv:
-	pr_err("error %d\n", err);
-
-	kfree(miux_tlv);
-	kfree(rw_tlv);
-
-	return err;
-}
-
-static struct sk_buff *nfc_llcp_allocate_snl(struct nfc_llcp_local *local,
-					     size_t tlv_length)
-{
-	struct sk_buff *skb;
-	struct nfc_dev *dev;
-	u16 size = 0;
-
-	if (local == NULL)
-		return ERR_PTR(-ENODEV);
-
-	dev = local->dev;
-	if (dev == NULL)
-		return ERR_PTR(-ENODEV);
-
-	size += LLCP_HEADER_SIZE;
-	size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
-	size += tlv_length;
-
-	skb = alloc_skb(size, GFP_KERNEL);
-	if (skb == NULL)
-		return ERR_PTR(-ENOMEM);
-
-	skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
-
-	skb = llcp_add_header(skb, LLCP_SAP_SDP, LLCP_SAP_SDP, LLCP_PDU_SNL);
-
-	return skb;
-}
-
-int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local,
-			    struct hlist_head *tlv_list, size_t tlvs_len)
-{
-	struct nfc_llcp_sdp_tlv *sdp;
-	struct hlist_node *n;
-	struct sk_buff *skb;
-
-	skb = nfc_llcp_allocate_snl(local, tlvs_len);
-	if (IS_ERR(skb))
-		return PTR_ERR(skb);
-
-	hlist_for_each_entry_safe(sdp, n, tlv_list, node) {
-		memcpy(skb_put(skb, sdp->tlv_len), sdp->tlv, sdp->tlv_len);
-
-		hlist_del(&sdp->node);
-
-		nfc_llcp_free_sdp_tlv(sdp);
-	}
-
-	skb_queue_tail(&local->tx_queue, skb);
-
-	return 0;
-}
-
-int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local,
-			    struct hlist_head *tlv_list, size_t tlvs_len)
-{
-	struct nfc_llcp_sdp_tlv *sdreq;
-	struct hlist_node *n;
-	struct sk_buff *skb;
-
-	skb = nfc_llcp_allocate_snl(local, tlvs_len);
-	if (IS_ERR(skb))
-		return PTR_ERR(skb);
-
-	mutex_lock(&local->sdreq_lock);
-
-	if (hlist_empty(&local->pending_sdreqs))
-		mod_timer(&local->sdreq_timer,
-			  jiffies + msecs_to_jiffies(3 * local->remote_lto));
-
-	hlist_for_each_entry_safe(sdreq, n, tlv_list, node) {
-		pr_debug("tid %d for %s\n", sdreq->tid, sdreq->uri);
-
-		memcpy(skb_put(skb, sdreq->tlv_len), sdreq->tlv,
-		       sdreq->tlv_len);
-
-		hlist_del(&sdreq->node);
-
-		hlist_add_head(&sdreq->node, &local->pending_sdreqs);
-	}
-
-	mutex_unlock(&local->sdreq_lock);
-
-	skb_queue_tail(&local->tx_queue, skb);
-
-	return 0;
-}
-
-int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason)
-{
-	struct sk_buff *skb;
-	struct nfc_dev *dev;
-	u16 size = 1; /* Reason code */
-
-	pr_debug("Sending DM reason 0x%x\n", reason);
-
-	if (local == NULL)
-		return -ENODEV;
-
-	dev = local->dev;
-	if (dev == NULL)
-		return -ENODEV;
-
-	size += LLCP_HEADER_SIZE;
-	size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
-
-	skb = alloc_skb(size, GFP_KERNEL);
-	if (skb == NULL)
-		return -ENOMEM;
-
-	skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
-
-	skb = llcp_add_header(skb, dsap, ssap, LLCP_PDU_DM);
-
-	memcpy(skb_put(skb, 1), &reason, 1);
-
-	skb_queue_head(&local->tx_queue, skb);
-
-	return 0;
-}
-
-int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock)
-{
-	struct sk_buff *skb;
-	struct nfc_llcp_local *local;
-
-	pr_debug("Send DISC\n");
-
-	local = sock->local;
-	if (local == NULL)
-		return -ENODEV;
-
-	skb = llcp_allocate_pdu(sock, LLCP_PDU_DISC, 0);
-	if (skb == NULL)
-		return -ENOMEM;
-
-	skb_queue_head(&local->tx_queue, skb);
-
-	return 0;
-}
-
-int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
-			  struct msghdr *msg, size_t len)
-{
-	struct sk_buff *pdu;
-	struct sock *sk = &sock->sk;
-	struct nfc_llcp_local *local;
-	size_t frag_len = 0, remaining_len;
-	u8 *msg_data, *msg_ptr;
-	u16 remote_miu;
-
-	pr_debug("Send I frame len %zd\n", len);
-
-	local = sock->local;
-	if (local == NULL)
-		return -ENODEV;
-
-	/* Remote is ready but has not acknowledged our frames */
-	if((sock->remote_ready &&
-	    skb_queue_len(&sock->tx_pending_queue) >= sock->remote_rw &&
-	    skb_queue_len(&sock->tx_queue) >= 2 * sock->remote_rw)) {
-		pr_err("Pending queue is full %d frames\n",
-		       skb_queue_len(&sock->tx_pending_queue));
-		return -ENOBUFS;
-	}
-
-	/* Remote is not ready and we've been queueing enough frames */
-	if ((!sock->remote_ready &&
-	     skb_queue_len(&sock->tx_queue) >= 2 * sock->remote_rw)) {
-		pr_err("Tx queue is full %d frames\n",
-		       skb_queue_len(&sock->tx_queue));
-		return -ENOBUFS;
-	}
-
-	msg_data = kzalloc(len, GFP_KERNEL);
-	if (msg_data == NULL)
-		return -ENOMEM;
-
-	if (memcpy_fromiovec(msg_data, msg->msg_iov, len)) {
-		kfree(msg_data);
-		return -EFAULT;
-	}
-
-	remaining_len = len;
-	msg_ptr = msg_data;
-
-	do {
-		remote_miu = sock->remote_miu > LLCP_MAX_MIU ?
-				local->remote_miu : sock->remote_miu;
-
-		frag_len = min_t(size_t, remote_miu, remaining_len);
-
-		pr_debug("Fragment %zd bytes remaining %zd",
-			 frag_len, remaining_len);
-
-		pdu = llcp_allocate_pdu(sock, LLCP_PDU_I,
-					frag_len + LLCP_SEQUENCE_SIZE);
-		if (pdu == NULL)
-			return -ENOMEM;
-
-		skb_put(pdu, LLCP_SEQUENCE_SIZE);
-
-		if (likely(frag_len > 0))
-			memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
-
-		skb_queue_tail(&sock->tx_queue, pdu);
-
-		lock_sock(sk);
-
-		nfc_llcp_queue_i_frames(sock);
-
-		release_sock(sk);
-
-		remaining_len -= frag_len;
-		msg_ptr += frag_len;
-	} while (remaining_len > 0);
-
-	kfree(msg_data);
-
-	return len;
-}
-
-int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
-			   struct msghdr *msg, size_t len)
-{
-	struct sk_buff *pdu;
-	struct nfc_llcp_local *local;
-	size_t frag_len = 0, remaining_len;
-	u8 *msg_ptr, *msg_data;
-	u16 remote_miu;
-	int err;
-
-	pr_debug("Send UI frame len %zd\n", len);
-
-	local = sock->local;
-	if (local == NULL)
-		return -ENODEV;
-
-	msg_data = kzalloc(len, GFP_KERNEL);
-	if (msg_data == NULL)
-		return -ENOMEM;
-
-	if (memcpy_fromiovec(msg_data, msg->msg_iov, len)) {
-		kfree(msg_data);
-		return -EFAULT;
-	}
-
-	remaining_len = len;
-	msg_ptr = msg_data;
-
-	do {
-		remote_miu = sock->remote_miu > LLCP_MAX_MIU ?
-				local->remote_miu : sock->remote_miu;
-
-		frag_len = min_t(size_t, remote_miu, remaining_len);
-
-		pr_debug("Fragment %zd bytes remaining %zd",
-			 frag_len, remaining_len);
-
-		pdu = nfc_alloc_send_skb(sock->dev, &sock->sk, MSG_DONTWAIT,
-					 frag_len + LLCP_HEADER_SIZE, &err);
-		if (pdu == NULL) {
-			pr_err("Could not allocate PDU\n");
-			continue;
-		}
-
-		pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI);
-
-		if (likely(frag_len > 0))
-			memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
-
-		/* No need to check for the peer RW for UI frames */
-		skb_queue_tail(&local->tx_queue, pdu);
-
-		remaining_len -= frag_len;
-		msg_ptr += frag_len;
-	} while (remaining_len > 0);
-
-	kfree(msg_data);
-
-	return len;
-}
-
-int nfc_llcp_send_rr(struct nfc_llcp_sock *sock)
-{
-	struct sk_buff *skb;
-	struct nfc_llcp_local *local;
-
-	pr_debug("Send rr nr %d\n", sock->recv_n);
-
-	local = sock->local;
-	if (local == NULL)
-		return -ENODEV;
-
-	skb = llcp_allocate_pdu(sock, LLCP_PDU_RR, LLCP_SEQUENCE_SIZE);
-	if (skb == NULL)
-		return -ENOMEM;
-
-	skb_put(skb, LLCP_SEQUENCE_SIZE);
-
-	skb->data[2] = sock->recv_n;
-
-	skb_queue_head(&local->tx_queue, skb);
-
-	return 0;
-}