Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 1996 insertions, 0 deletions

diff --git a/kernel/net/irda/irlmp.c b/kernel/net/irda/irlmp.c
new file mode 100644
index 000000000..a26c401ef
--- /dev/null
+++ b/kernel/net/irda/irlmp.c
@@ -0,0 +1,1996 @@
+/*********************************************************************
+ *
+ * Filename:      irlmp.c
+ * Version:       1.0
+ * Description:   IrDA Link Management Protocol (LMP) layer
+ * Status:        Stable.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Sun Aug 17 20:54:32 1997
+ * Modified at:   Wed Jan  5 11:26:03 2000
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ *
+ *     Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>,
+ *     All Rights Reserved.
+ *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
+ *
+ *     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.
+ *
+ *     Neither Dag Brattli nor University of Tromsø admit liability nor
+ *     provide warranty for any of this software. This material is
+ *     provided "AS-IS" and at no charge.
+ *
+ ********************************************************************/
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/kmod.h>
+#include <linux/random.h>
+#include <linux/seq_file.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/timer.h>
+#include <net/irda/qos.h>
+#include <net/irda/irlap.h>
+#include <net/irda/iriap.h>
+#include <net/irda/irlmp.h>
+#include <net/irda/irlmp_frame.h>
+
+#include <asm/unaligned.h>
+
+static __u8 irlmp_find_free_slsap(void);
+static int irlmp_slsap_inuse(__u8 slsap_sel);
+
+/* Master structure */
+struct irlmp_cb *irlmp = NULL;
+
+/* These can be altered by the sysctl interface */
+int  sysctl_discovery         = 0;
+int  sysctl_discovery_timeout = 3; /* 3 seconds by default */
+int  sysctl_discovery_slots   = 6; /* 6 slots by default */
+int  sysctl_lap_keepalive_time = LM_IDLE_TIMEOUT * 1000 / HZ;
+char sysctl_devname[65];
+
+static const char *irlmp_reasons[] = {
+	"ERROR, NOT USED",
+	"LM_USER_REQUEST",
+	"LM_LAP_DISCONNECT",
+	"LM_CONNECT_FAILURE",
+	"LM_LAP_RESET",
+	"LM_INIT_DISCONNECT",
+	"ERROR, NOT USED",
+	"UNKNOWN",
+};
+
+const char *irlmp_reason_str(LM_REASON reason)
+{
+	reason = min_t(size_t, reason, ARRAY_SIZE(irlmp_reasons) - 1);
+	return irlmp_reasons[reason];
+}
+
+/*
+ * Function irlmp_init (void)
+ *
+ *    Create (allocate) the main IrLMP structure
+ *
+ */
+int __init irlmp_init(void)
+{
+	/* Initialize the irlmp structure. */
+	irlmp = kzalloc( sizeof(struct irlmp_cb), GFP_KERNEL);
+	if (irlmp == NULL)
+		return -ENOMEM;
+
+	irlmp->magic = LMP_MAGIC;
+
+	irlmp->clients = hashbin_new(HB_LOCK);
+	irlmp->services = hashbin_new(HB_LOCK);
+	irlmp->links = hashbin_new(HB_LOCK);
+	irlmp->unconnected_lsaps = hashbin_new(HB_LOCK);
+	irlmp->cachelog = hashbin_new(HB_NOLOCK);
+
+	if ((irlmp->clients == NULL) ||
+	    (irlmp->services == NULL) ||
+	    (irlmp->links == NULL) ||
+	    (irlmp->unconnected_lsaps == NULL) ||
+	    (irlmp->cachelog == NULL)) {
+		return -ENOMEM;
+	}
+
+	spin_lock_init(&irlmp->cachelog->hb_spinlock);
+
+	irlmp->last_lsap_sel = 0x0f; /* Reserved 0x00-0x0f */
+	strcpy(sysctl_devname, "Linux");
+
+	init_timer(&irlmp->discovery_timer);
+
+	/* Do discovery every 3 seconds, conditionally */
+	if (sysctl_discovery)
+		irlmp_start_discovery_timer(irlmp,
+					    sysctl_discovery_timeout*HZ);
+
+	return 0;
+}
+
+/*
+ * Function irlmp_cleanup (void)
+ *
+ *    Remove IrLMP layer
+ *
+ */
+void irlmp_cleanup(void)
+{
+	/* Check for main structure */
+	IRDA_ASSERT(irlmp != NULL, return;);
+	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return;);
+
+	del_timer(&irlmp->discovery_timer);
+
+	hashbin_delete(irlmp->links, (FREE_FUNC) kfree);
+	hashbin_delete(irlmp->unconnected_lsaps, (FREE_FUNC) kfree);
+	hashbin_delete(irlmp->clients, (FREE_FUNC) kfree);
+	hashbin_delete(irlmp->services, (FREE_FUNC) kfree);
+	hashbin_delete(irlmp->cachelog, (FREE_FUNC) kfree);
+
+	/* De-allocate main structure */
+	kfree(irlmp);
+	irlmp = NULL;
+}
+
+/*
+ * Function irlmp_open_lsap (slsap, notify)
+ *
+ *   Register with IrLMP and create a local LSAP,
+ *   returns handle to LSAP.
+ */
+struct lsap_cb *irlmp_open_lsap(__u8 slsap_sel, notify_t *notify, __u8 pid)
+{
+	struct lsap_cb *self;
+
+	IRDA_ASSERT(notify != NULL, return NULL;);
+	IRDA_ASSERT(irlmp != NULL, return NULL;);
+	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return NULL;);
+	IRDA_ASSERT(notify->instance != NULL, return NULL;);
+
+	/*  Does the client care which Source LSAP selector it gets?  */
+	if (slsap_sel == LSAP_ANY) {
+		slsap_sel = irlmp_find_free_slsap();
+		if (!slsap_sel)
+			return NULL;
+	} else if (irlmp_slsap_inuse(slsap_sel))
+		return NULL;
+
+	/* Allocate new instance of a LSAP connection */
+	self = kzalloc(sizeof(struct lsap_cb), GFP_ATOMIC);
+	if (self == NULL)
+		return NULL;
+
+	self->magic = LMP_LSAP_MAGIC;
+	self->slsap_sel = slsap_sel;
+
+	/* Fix connectionless LSAP's */
+	if (slsap_sel == LSAP_CONNLESS) {
+#ifdef CONFIG_IRDA_ULTRA
+		self->dlsap_sel = LSAP_CONNLESS;
+		self->pid = pid;
+#endif /* CONFIG_IRDA_ULTRA */
+	} else
+		self->dlsap_sel = LSAP_ANY;
+	/* self->connected = FALSE; -> already NULL via memset() */
+
+	init_timer(&self->watchdog_timer);
+
+	self->notify = *notify;
+
+	self->lsap_state = LSAP_DISCONNECTED;
+
+	/* Insert into queue of unconnected LSAPs */
+	hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self,
+		       (long) self, NULL);
+
+	return self;
+}
+EXPORT_SYMBOL(irlmp_open_lsap);
+
+/*
+ * Function __irlmp_close_lsap (self)
+ *
+ *    Remove an instance of LSAP
+ */
+static void __irlmp_close_lsap(struct lsap_cb *self)
+{
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
+
+	/*
+	 *  Set some of the variables to preset values
+	 */
+	self->magic = 0;
+	del_timer(&self->watchdog_timer); /* Important! */
+
+	if (self->conn_skb)
+		dev_kfree_skb(self->conn_skb);
+
+	kfree(self);
+}
+
+/*
+ * Function irlmp_close_lsap (self)
+ *
+ *    Close and remove LSAP
+ *
+ */
+void irlmp_close_lsap(struct lsap_cb *self)
+{
+	struct lap_cb *lap;
+	struct lsap_cb *lsap = NULL;
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
+
+	/*
+	 *  Find out if we should remove this LSAP from a link or from the
+	 *  list of unconnected lsaps (not associated with a link)
+	 */
+	lap = self->lap;
+	if (lap) {
+		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
+		/* We might close a LSAP before it has completed the
+		 * connection setup. In those case, higher layers won't
+		 * send a proper disconnect request. Harmless, except
+		 * that we will forget to close LAP... - Jean II */
+		if(self->lsap_state != LSAP_DISCONNECTED) {
+			self->lsap_state = LSAP_DISCONNECTED;
+			irlmp_do_lap_event(self->lap,
+					   LM_LAP_DISCONNECT_REQUEST, NULL);
+		}
+		/* Now, remove from the link */
+		lsap = hashbin_remove(lap->lsaps, (long) self, NULL);
+#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
+		lap->cache.valid = FALSE;
+#endif
+	}
+	self->lap = NULL;
+	/* Check if we found the LSAP! If not then try the unconnected lsaps */
+	if (!lsap) {
+		lsap = hashbin_remove(irlmp->unconnected_lsaps, (long) self,
+				      NULL);
+	}
+	if (!lsap) {
+		pr_debug("%s(), Looks like somebody has removed me already!\n",
+			 __func__);
+		return;
+	}
+	__irlmp_close_lsap(self);
+}
+EXPORT_SYMBOL(irlmp_close_lsap);
+
+/*
+ * Function irlmp_register_irlap (saddr, notify)
+ *
+ *    Register IrLAP layer with IrLMP. There is possible to have multiple
+ *    instances of the IrLAP layer, each connected to different IrDA ports
+ *
+ */
+void irlmp_register_link(struct irlap_cb *irlap, __u32 saddr, notify_t *notify)
+{
+	struct lap_cb *lap;
+
+	IRDA_ASSERT(irlmp != NULL, return;);
+	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return;);
+	IRDA_ASSERT(notify != NULL, return;);
+
+	/*
+	 *  Allocate new instance of a LSAP connection
+	 */
+	lap = kzalloc(sizeof(struct lap_cb), GFP_KERNEL);
+	if (lap == NULL)
+		return;
+
+	lap->irlap = irlap;
+	lap->magic = LMP_LAP_MAGIC;
+	lap->saddr = saddr;
+	lap->daddr = DEV_ADDR_ANY;
+#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
+	lap->cache.valid = FALSE;
+#endif
+	lap->lsaps = hashbin_new(HB_LOCK);
+	if (lap->lsaps == NULL) {
+		net_warn_ratelimited("%s(), unable to kmalloc lsaps\n",
+				     __func__);
+		kfree(lap);
+		return;
+	}
+
+	lap->lap_state = LAP_STANDBY;
+
+	init_timer(&lap->idle_timer);
+
+	/*
+	 *  Insert into queue of LMP links
+	 */
+	hashbin_insert(irlmp->links, (irda_queue_t *) lap, lap->saddr, NULL);
+
+	/*
+	 *  We set only this variable so IrLAP can tell us on which link the
+	 *  different events happened on
+	 */
+	irda_notify_init(notify);
+	notify->instance = lap;
+}
+
+/*
+ * Function irlmp_unregister_irlap (saddr)
+ *
+ *    IrLAP layer has been removed!
+ *
+ */
+void irlmp_unregister_link(__u32 saddr)
+{
+	struct lap_cb *link;
+
+	/* We must remove ourselves from the hashbin *first*. This ensure
+	 * that no more LSAPs will be open on this link and no discovery
+	 * will be triggered anymore. Jean II */
+	link = hashbin_remove(irlmp->links, saddr, NULL);
+	if (link) {
+		IRDA_ASSERT(link->magic == LMP_LAP_MAGIC, return;);
+
+		/* Kill all the LSAPs on this link. Jean II */
+		link->reason = LAP_DISC_INDICATION;
+		link->daddr = DEV_ADDR_ANY;
+		irlmp_do_lap_event(link, LM_LAP_DISCONNECT_INDICATION, NULL);
+
+		/* Remove all discoveries discovered at this link */
+		irlmp_expire_discoveries(irlmp->cachelog, link->saddr, TRUE);
+
+		/* Final cleanup */
+		del_timer(&link->idle_timer);
+		link->magic = 0;
+		hashbin_delete(link->lsaps, (FREE_FUNC) __irlmp_close_lsap);
+		kfree(link);
+	}
+}
+
+/*
+ * Function irlmp_connect_request (handle, dlsap, userdata)
+ *
+ *    Connect with a peer LSAP
+ *
+ */
+int irlmp_connect_request(struct lsap_cb *self, __u8 dlsap_sel,
+			  __u32 saddr, __u32 daddr,
+			  struct qos_info *qos, struct sk_buff *userdata)
+{
+	struct sk_buff *tx_skb = userdata;
+	struct lap_cb *lap;
+	struct lsap_cb *lsap;
+	int ret;
+
+	IRDA_ASSERT(self != NULL, return -EBADR;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -EBADR;);
+
+	pr_debug("%s(), slsap_sel=%02x, dlsap_sel=%02x, saddr=%08x, daddr=%08x\n",
+		 __func__, self->slsap_sel, dlsap_sel, saddr, daddr);
+
+	if (test_bit(0, &self->connected)) {
+		ret = -EISCONN;
+		goto err;
+	}
+
+	/* Client must supply destination device address */
+	if (!daddr) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	/* Any userdata? */
+	if (tx_skb == NULL) {
+		tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
+		if (!tx_skb)
+			return -ENOMEM;
+
+		skb_reserve(tx_skb, LMP_MAX_HEADER);
+	}
+
+	/* Make room for MUX control header (3 bytes) */
+	IRDA_ASSERT(skb_headroom(tx_skb) >= LMP_CONTROL_HEADER, return -1;);
+	skb_push(tx_skb, LMP_CONTROL_HEADER);
+
+	self->dlsap_sel = dlsap_sel;
+
+	/*
+	 * Find the link to where we should try to connect since there may
+	 * be more than one IrDA port on this machine. If the client has
+	 * passed us the saddr (and already knows which link to use), then
+	 * we use that to find the link, if not then we have to look in the
+	 * discovery log and check if any of the links has discovered a
+	 * device with the given daddr
+	 */
+	if ((!saddr) || (saddr == DEV_ADDR_ANY)) {
+		discovery_t *discovery;
+		unsigned long flags;
+
+		spin_lock_irqsave(&irlmp->cachelog->hb_spinlock, flags);
+		if (daddr != DEV_ADDR_ANY)
+			discovery = hashbin_find(irlmp->cachelog, daddr, NULL);
+		else {
+			pr_debug("%s(), no daddr\n", __func__);
+			discovery = (discovery_t *)
+				hashbin_get_first(irlmp->cachelog);
+		}
+
+		if (discovery) {
+			saddr = discovery->data.saddr;
+			daddr = discovery->data.daddr;
+		}
+		spin_unlock_irqrestore(&irlmp->cachelog->hb_spinlock, flags);
+	}
+	lap = hashbin_lock_find(irlmp->links, saddr, NULL);
+	if (lap == NULL) {
+		pr_debug("%s(), Unable to find a usable link!\n", __func__);
+		ret = -EHOSTUNREACH;
+		goto err;
+	}
+
+	/* Check if LAP is disconnected or already connected */
+	if (lap->daddr == DEV_ADDR_ANY)
+		lap->daddr = daddr;
+	else if (lap->daddr != daddr) {
+		/* Check if some LSAPs are active on this LAP */
+		if (HASHBIN_GET_SIZE(lap->lsaps) == 0) {
+			/* No active connection, but LAP hasn't been
+			 * disconnected yet (waiting for timeout in LAP).
+			 * Maybe we could give LAP a bit of help in this case.
+			 */
+			pr_debug("%s(), sorry, but I'm waiting for LAP to timeout!\n",
+				 __func__);
+			ret = -EAGAIN;
+			goto err;
+		}
+
+		/* LAP is already connected to a different node, and LAP
+		 * can only talk to one node at a time */
+		pr_debug("%s(), sorry, but link is busy!\n", __func__);
+		ret = -EBUSY;
+		goto err;
+	}
+
+	self->lap = lap;
+
+	/*
+	 *  Remove LSAP from list of unconnected LSAPs and insert it into the
+	 *  list of connected LSAPs for the particular link
+	 */
+	lsap = hashbin_remove(irlmp->unconnected_lsaps, (long) self, NULL);
+
+	IRDA_ASSERT(lsap != NULL, return -1;);
+	IRDA_ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
+	IRDA_ASSERT(lsap->lap != NULL, return -1;);
+	IRDA_ASSERT(lsap->lap->magic == LMP_LAP_MAGIC, return -1;);
+
+	hashbin_insert(self->lap->lsaps, (irda_queue_t *) self, (long) self,
+		       NULL);
+
+	set_bit(0, &self->connected);	/* TRUE */
+
+	/*
+	 *  User supplied qos specifications?
+	 */
+	if (qos)
+		self->qos = *qos;
+
+	irlmp_do_lsap_event(self, LM_CONNECT_REQUEST, tx_skb);
+
+	/* Drop reference count - see irlap_data_request(). */
+	dev_kfree_skb(tx_skb);
+
+	return 0;
+
+err:
+	/* Cleanup */
+	if(tx_skb)
+		dev_kfree_skb(tx_skb);
+	return ret;
+}
+EXPORT_SYMBOL(irlmp_connect_request);
+
+/*
+ * Function irlmp_connect_indication (self)
+ *
+ *    Incoming connection
+ *
+ */
+void irlmp_connect_indication(struct lsap_cb *self, struct sk_buff *skb)
+{
+	int max_seg_size;
+	int lap_header_size;
+	int max_header_size;
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
+	IRDA_ASSERT(skb != NULL, return;);
+	IRDA_ASSERT(self->lap != NULL, return;);
+
+	pr_debug("%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
+		 __func__, self->slsap_sel, self->dlsap_sel);
+
+	/* Note : self->lap is set in irlmp_link_data_indication(),
+	 * (case CONNECT_CMD:) because we have no way to set it here.
+	 * Similarly, self->dlsap_sel is usually set in irlmp_find_lsap().
+	 * Jean II */
+
+	self->qos = *self->lap->qos;
+
+	max_seg_size = self->lap->qos->data_size.value-LMP_HEADER;
+	lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
+	max_header_size = LMP_HEADER + lap_header_size;
+
+	/* Hide LMP_CONTROL_HEADER header from layer above */
+	skb_pull(skb, LMP_CONTROL_HEADER);
+
+	if (self->notify.connect_indication) {
+		/* Don't forget to refcount it - see irlap_driver_rcv(). */
+		skb_get(skb);
+		self->notify.connect_indication(self->notify.instance, self,
+						&self->qos, max_seg_size,
+						max_header_size, skb);
+	}
+}
+
+/*
+ * Function irlmp_connect_response (handle, userdata)
+ *
+ *    Service user is accepting connection
+ *
+ */
+int irlmp_connect_response(struct lsap_cb *self, struct sk_buff *userdata)
+{
+	IRDA_ASSERT(self != NULL, return -1;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
+	IRDA_ASSERT(userdata != NULL, return -1;);
+
+	/* We set the connected bit and move the lsap to the connected list
+	 * in the state machine itself. Jean II */
+
+	pr_debug("%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
+		 __func__, self->slsap_sel, self->dlsap_sel);
+
+	/* Make room for MUX control header (3 bytes) */
+	IRDA_ASSERT(skb_headroom(userdata) >= LMP_CONTROL_HEADER, return -1;);
+	skb_push(userdata, LMP_CONTROL_HEADER);
+
+	irlmp_do_lsap_event(self, LM_CONNECT_RESPONSE, userdata);
+
+	/* Drop reference count - see irlap_data_request(). */
+	dev_kfree_skb(userdata);
+
+	return 0;
+}
+EXPORT_SYMBOL(irlmp_connect_response);
+
+/*
+ * Function irlmp_connect_confirm (handle, skb)
+ *
+ *    LSAP connection confirmed peer device!
+ */
+void irlmp_connect_confirm(struct lsap_cb *self, struct sk_buff *skb)
+{
+	int max_header_size;
+	int lap_header_size;
+	int max_seg_size;
+
+	IRDA_ASSERT(skb != NULL, return;);
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
+	IRDA_ASSERT(self->lap != NULL, return;);
+
+	self->qos = *self->lap->qos;
+
+	max_seg_size    = self->lap->qos->data_size.value-LMP_HEADER;
+	lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
+	max_header_size = LMP_HEADER + lap_header_size;
+
+	pr_debug("%s(), max_header_size=%d\n",
+		 __func__, max_header_size);
+
+	/* Hide LMP_CONTROL_HEADER header from layer above */
+	skb_pull(skb, LMP_CONTROL_HEADER);
+
+	if (self->notify.connect_confirm) {
+		/* Don't forget to refcount it - see irlap_driver_rcv() */
+		skb_get(skb);
+		self->notify.connect_confirm(self->notify.instance, self,
+					     &self->qos, max_seg_size,
+					     max_header_size, skb);
+	}
+}
+
+/*
+ * Function irlmp_dup (orig, instance)
+ *
+ *    Duplicate LSAP, can be used by servers to confirm a connection on a
+ *    new LSAP so it can keep listening on the old one.
+ *
+ */
+struct lsap_cb *irlmp_dup(struct lsap_cb *orig, void *instance)
+{
+	struct lsap_cb *new;
+	unsigned long flags;
+
+	spin_lock_irqsave(&irlmp->unconnected_lsaps->hb_spinlock, flags);
+
+	/* Only allowed to duplicate unconnected LSAP's, and only LSAPs
+	 * that have received a connect indication. Jean II */
+	if ((!hashbin_find(irlmp->unconnected_lsaps, (long) orig, NULL)) ||
+	    (orig->lap == NULL)) {
+		pr_debug("%s(), invalid LSAP (wrong state)\n",
+			 __func__);
+		spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock,
+				       flags);
+		return NULL;
+	}
+
+	/* Allocate a new instance */
+	new = kmemdup(orig, sizeof(*new), GFP_ATOMIC);
+	if (!new)  {
+		pr_debug("%s(), unable to kmalloc\n", __func__);
+		spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock,
+				       flags);
+		return NULL;
+	}
+	/* new->lap = orig->lap; => done in the memcpy() */
+	/* new->slsap_sel = orig->slsap_sel; => done in the memcpy() */
+	new->conn_skb = NULL;
+
+	spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
+
+	/* Not everything is the same */
+	new->notify.instance = instance;
+
+	init_timer(&new->watchdog_timer);
+
+	hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) new,
+		       (long) new, NULL);
+
+#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
+	/* Make sure that we invalidate the LSAP cache */
+	new->lap->cache.valid = FALSE;
+#endif /* CONFIG_IRDA_CACHE_LAST_LSAP */
+
+	return new;
+}
+
+/*
+ * Function irlmp_disconnect_request (handle, userdata)
+ *
+ *    The service user is requesting disconnection, this will not remove the
+ *    LSAP, but only mark it as disconnected
+ */
+int irlmp_disconnect_request(struct lsap_cb *self, struct sk_buff *userdata)
+{
+	struct lsap_cb *lsap;
+
+	IRDA_ASSERT(self != NULL, return -1;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
+	IRDA_ASSERT(userdata != NULL, return -1;);
+
+	/* Already disconnected ?
+	 * There is a race condition between irlmp_disconnect_indication()
+	 * and us that might mess up the hashbins below. This fixes it.
+	 * Jean II */
+	if (! test_and_clear_bit(0, &self->connected)) {
+		pr_debug("%s(), already disconnected!\n", __func__);
+		dev_kfree_skb(userdata);
+		return -1;
+	}
+
+	skb_push(userdata, LMP_CONTROL_HEADER);
+
+	/*
+	 *  Do the event before the other stuff since we must know
+	 *  which lap layer that the frame should be transmitted on
+	 */
+	irlmp_do_lsap_event(self, LM_DISCONNECT_REQUEST, userdata);
+
+	/* Drop reference count - see irlap_data_request(). */
+	dev_kfree_skb(userdata);
+
+	/*
+	 *  Remove LSAP from list of connected LSAPs for the particular link
+	 *  and insert it into the list of unconnected LSAPs
+	 */
+	IRDA_ASSERT(self->lap != NULL, return -1;);
+	IRDA_ASSERT(self->lap->magic == LMP_LAP_MAGIC, return -1;);
+	IRDA_ASSERT(self->lap->lsaps != NULL, return -1;);
+
+	lsap = hashbin_remove(self->lap->lsaps, (long) self, NULL);
+#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
+	self->lap->cache.valid = FALSE;
+#endif
+
+	IRDA_ASSERT(lsap != NULL, return -1;);
+	IRDA_ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
+	IRDA_ASSERT(lsap == self, return -1;);
+
+	hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self,
+		       (long) self, NULL);
+
+	/* Reset some values */
+	self->dlsap_sel = LSAP_ANY;
+	self->lap = NULL;
+
+	return 0;
+}
+EXPORT_SYMBOL(irlmp_disconnect_request);
+
+/*
+ * Function irlmp_disconnect_indication (reason, userdata)
+ *
+ *    LSAP is being closed!
+ */
+void irlmp_disconnect_indication(struct lsap_cb *self, LM_REASON reason,
+				 struct sk_buff *skb)
+{
+	struct lsap_cb *lsap;
+
+	pr_debug("%s(), reason=%s [%d]\n", __func__,
+		 irlmp_reason_str(reason), reason);
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
+
+	pr_debug("%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
+		 __func__, self->slsap_sel, self->dlsap_sel);
+
+	/* Already disconnected ?
+	 * There is a race condition between irlmp_disconnect_request()
+	 * and us that might mess up the hashbins below. This fixes it.
+	 * Jean II */
+	if (! test_and_clear_bit(0, &self->connected)) {
+		pr_debug("%s(), already disconnected!\n", __func__);
+		return;
+	}
+
+	/*
+	 *  Remove association between this LSAP and the link it used
+	 */
+	IRDA_ASSERT(self->lap != NULL, return;);
+	IRDA_ASSERT(self->lap->lsaps != NULL, return;);
+
+	lsap = hashbin_remove(self->lap->lsaps, (long) self, NULL);
+#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
+	self->lap->cache.valid = FALSE;
+#endif
+
+	IRDA_ASSERT(lsap != NULL, return;);
+	IRDA_ASSERT(lsap == self, return;);
+	hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) lsap,
+		       (long) lsap, NULL);
+
+	self->dlsap_sel = LSAP_ANY;
+	self->lap = NULL;
+
+	/*
+	 *  Inform service user
+	 */
+	if (self->notify.disconnect_indication) {
+		/* Don't forget to refcount it - see irlap_driver_rcv(). */
+		if(skb)
+			skb_get(skb);
+		self->notify.disconnect_indication(self->notify.instance,
+						   self, reason, skb);
+	} else {
+		pr_debug("%s(), no handler\n", __func__);
+	}
+}
+
+/*
+ * Function irlmp_do_expiry (void)
+ *
+ *    Do a cleanup of the discovery log (remove old entries)
+ *
+ * Note : separate from irlmp_do_discovery() so that we can handle
+ * passive discovery properly.
+ */
+void irlmp_do_expiry(void)
+{
+	struct lap_cb *lap;
+
+	/*
+	 * Expire discovery on all links which are *not* connected.
+	 * On links which are connected, we can't do discovery
+	 * anymore and can't refresh the log, so we freeze the
+	 * discovery log to keep info about the device we are
+	 * connected to.
+	 * This info is mandatory if we want irlmp_connect_request()
+	 * to work properly. - Jean II
+	 */
+	lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
+	while (lap != NULL) {
+		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
+
+		if (lap->lap_state == LAP_STANDBY) {
+			/* Expire discoveries discovered on this link */
+			irlmp_expire_discoveries(irlmp->cachelog, lap->saddr,
+						 FALSE);
+		}
+		lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
+	}
+}
+
+/*
+ * Function irlmp_do_discovery (nslots)
+ *
+ *    Do some discovery on all links
+ *
+ * Note : log expiry is done above.
+ */
+void irlmp_do_discovery(int nslots)
+{
+	struct lap_cb *lap;
+	__u16 *data_hintsp;
+
+	/* Make sure the value is sane */
+	if ((nslots != 1) && (nslots != 6) && (nslots != 8) && (nslots != 16)){
+		net_warn_ratelimited("%s: invalid value for number of slots!\n",
+				     __func__);
+		nslots = sysctl_discovery_slots = 8;
+	}
+
+	/* Construct new discovery info to be used by IrLAP, */
+	data_hintsp = (__u16 *) irlmp->discovery_cmd.data.hints;
+	put_unaligned(irlmp->hints.word, data_hintsp);
+
+	/*
+	 *  Set character set for device name (we use ASCII), and
+	 *  copy device name. Remember to make room for a \0 at the
+	 *  end
+	 */
+	irlmp->discovery_cmd.data.charset = CS_ASCII;
+	strncpy(irlmp->discovery_cmd.data.info, sysctl_devname,
+		NICKNAME_MAX_LEN);
+	irlmp->discovery_cmd.name_len = strlen(irlmp->discovery_cmd.data.info);
+	irlmp->discovery_cmd.nslots = nslots;
+
+	/*
+	 * Try to send discovery packets on all links
+	 */
+	lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
+	while (lap != NULL) {
+		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
+
+		if (lap->lap_state == LAP_STANDBY) {
+			/* Try to discover */
+			irlmp_do_lap_event(lap, LM_LAP_DISCOVERY_REQUEST,
+					   NULL);
+		}
+		lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
+	}
+}
+
+/*
+ * Function irlmp_discovery_request (nslots)
+ *
+ *    Do a discovery of devices in front of the computer
+ *
+ * If the caller has registered a client discovery callback, this
+ * allow him to receive the full content of the discovery log through
+ * this callback (as normally he will receive only new discoveries).
+ */
+void irlmp_discovery_request(int nslots)
+{
+	/* Return current cached discovery log (in full) */
+	irlmp_discovery_confirm(irlmp->cachelog, DISCOVERY_LOG);
+
+	/*
+	 * Start a single discovery operation if discovery is not already
+	 * running
+	 */
+	if (!sysctl_discovery) {
+		/* Check if user wants to override the default */
+		if (nslots == DISCOVERY_DEFAULT_SLOTS)
+			nslots = sysctl_discovery_slots;
+
+		irlmp_do_discovery(nslots);
+		/* Note : we never do expiry here. Expiry will run on the
+		 * discovery timer regardless of the state of sysctl_discovery
+		 * Jean II */
+	}
+}
+EXPORT_SYMBOL(irlmp_discovery_request);
+
+/*
+ * Function irlmp_get_discoveries (pn, mask, slots)
+ *
+ *    Return the current discovery log
+ *
+ * If discovery is not enabled, you should call this function again
+ * after 1 or 2 seconds (i.e. after discovery has been done).
+ */
+struct irda_device_info *irlmp_get_discoveries(int *pn, __u16 mask, int nslots)
+{
+	/* If discovery is not enabled, it's likely that the discovery log
+	 * will be empty. So, we trigger a single discovery, so that next
+	 * time the user call us there might be some results in the log.
+	 * Jean II
+	 */
+	if (!sysctl_discovery) {
+		/* Check if user wants to override the default */
+		if (nslots == DISCOVERY_DEFAULT_SLOTS)
+			nslots = sysctl_discovery_slots;
+
+		/* Start discovery - will complete sometime later */
+		irlmp_do_discovery(nslots);
+		/* Note : we never do expiry here. Expiry will run on the
+		 * discovery timer regardless of the state of sysctl_discovery
+		 * Jean II */
+	}
+
+	/* Return current cached discovery log */
+	return irlmp_copy_discoveries(irlmp->cachelog, pn, mask, TRUE);
+}
+EXPORT_SYMBOL(irlmp_get_discoveries);
+
+/*
+ * Function irlmp_notify_client (log)
+ *
+ *    Notify all about discovered devices
+ *
+ * Clients registered with IrLMP are :
+ *	o IrComm
+ *	o IrLAN
+ *	o Any socket (in any state - ouch, that may be a lot !)
+ * The client may have defined a callback to be notified in case of
+ * partial/selective discovery based on the hints that it passed to IrLMP.
+ */
+static inline void
+irlmp_notify_client(irlmp_client_t *client,
+		    hashbin_t *log, DISCOVERY_MODE mode)
+{
+	discinfo_t *discoveries;	/* Copy of the discovery log */
+	int	number;			/* Number of nodes in the log */
+	int	i;
+
+	/* Check if client wants or not partial/selective log (optimisation) */
+	if (!client->disco_callback)
+		return;
+
+	/*
+	 * Locking notes :
+	 * the old code was manipulating the log directly, which was
+	 * very racy. Now, we use copy_discoveries, that protects
+	 * itself while dumping the log for us.
+	 * The overhead of the copy is compensated by the fact that
+	 * we only pass new discoveries in normal mode and don't
+	 * pass the same old entry every 3s to the caller as we used
+	 * to do (virtual function calling is expensive).
+	 * Jean II
+	 */
+
+	/*
+	 * Now, check all discovered devices (if any), and notify client
+	 * only about the services that the client is interested in
+	 * We also notify only about the new devices unless the caller
+	 * explicitly request a dump of the log. Jean II
+	 */
+	discoveries = irlmp_copy_discoveries(log, &number,
+					     client->hint_mask.word,
+					     (mode == DISCOVERY_LOG));
+	/* Check if the we got some results */
+	if (discoveries == NULL)
+		return;	/* No nodes discovered */
+
+	/* Pass all entries to the listener */
+	for(i = 0; i < number; i++)
+		client->disco_callback(&(discoveries[i]), mode, client->priv);
+
+	/* Free up our buffer */
+	kfree(discoveries);
+}
+
+/*
+ * Function irlmp_discovery_confirm ( self, log)
+ *
+ *    Some device(s) answered to our discovery request! Check to see which
+ *    device it is, and give indication to the client(s)
+ *
+ */
+void irlmp_discovery_confirm(hashbin_t *log, DISCOVERY_MODE mode)
+{
+	irlmp_client_t *client;
+	irlmp_client_t *client_next;
+
+	IRDA_ASSERT(log != NULL, return;);
+
+	if (!(HASHBIN_GET_SIZE(log)))
+		return;
+
+	/* For each client - notify callback may touch client list */
+	client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
+	while (NULL != hashbin_find_next(irlmp->clients, (long) client, NULL,
+					 (void *) &client_next) ) {
+		/* Check if we should notify client */
+		irlmp_notify_client(client, log, mode);
+
+		client = client_next;
+	}
+}
+
+/*
+ * Function irlmp_discovery_expiry (expiry)
+ *
+ *	This device is no longer been discovered, and therefore it is being
+ *	purged from the discovery log. Inform all clients who have
+ *	registered for this event...
+ *
+ *	Note : called exclusively from discovery.c
+ *	Note : this is no longer called under discovery spinlock, so the
+ *		client can do whatever he wants in the callback.
+ */
+void irlmp_discovery_expiry(discinfo_t *expiries, int number)
+{
+	irlmp_client_t *client;
+	irlmp_client_t *client_next;
+	int		i;
+
+	IRDA_ASSERT(expiries != NULL, return;);
+
+	/* For each client - notify callback may touch client list */
+	client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
+	while (NULL != hashbin_find_next(irlmp->clients, (long) client, NULL,
+					 (void *) &client_next) ) {
+
+		/* Pass all entries to the listener */
+		for(i = 0; i < number; i++) {
+			/* Check if we should notify client */
+			if ((client->expir_callback) &&
+			    (client->hint_mask.word &
+			     get_unaligned((__u16 *)expiries[i].hints)
+			     & 0x7f7f) )
+				client->expir_callback(&(expiries[i]),
+						       EXPIRY_TIMEOUT,
+						       client->priv);
+		}
+
+		/* Next client */
+		client = client_next;
+	}
+}
+
+/*
+ * Function irlmp_get_discovery_response ()
+ *
+ *    Used by IrLAP to get the discovery info it needs when answering
+ *    discovery requests by other devices.
+ */
+discovery_t *irlmp_get_discovery_response(void)
+{
+	IRDA_ASSERT(irlmp != NULL, return NULL;);
+
+	put_unaligned(irlmp->hints.word, (__u16 *)irlmp->discovery_rsp.data.hints);
+
+	/*
+	 *  Set character set for device name (we use ASCII), and
+	 *  copy device name. Remember to make room for a \0 at the
+	 *  end
+	 */
+	irlmp->discovery_rsp.data.charset = CS_ASCII;
+
+	strncpy(irlmp->discovery_rsp.data.info, sysctl_devname,
+		NICKNAME_MAX_LEN);
+	irlmp->discovery_rsp.name_len = strlen(irlmp->discovery_rsp.data.info);
+
+	return &irlmp->discovery_rsp;
+}
+
+/*
+ * Function irlmp_data_request (self, skb)
+ *
+ *    Send some data to peer device
+ *
+ * Note on skb management :
+ * After calling the lower layers of the IrDA stack, we always
+ * kfree() the skb, which drop the reference count (and potentially
+ * destroy it).
+ * IrLMP and IrLAP may queue the packet, and in those cases will need
+ * to use skb_get() to keep it around.
+ * Jean II
+ */
+int irlmp_data_request(struct lsap_cb *self, struct sk_buff *userdata)
+{
+	int	ret;
+
+	IRDA_ASSERT(self != NULL, return -1;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
+
+	/* Make room for MUX header */
+	IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER, return -1;);
+	skb_push(userdata, LMP_HEADER);
+
+	ret = irlmp_do_lsap_event(self, LM_DATA_REQUEST, userdata);
+
+	/* Drop reference count - see irlap_data_request(). */
+	dev_kfree_skb(userdata);
+
+	return ret;
+}
+EXPORT_SYMBOL(irlmp_data_request);
+
+/*
+ * Function irlmp_data_indication (handle, skb)
+ *
+ *    Got data from LAP layer so pass it up to upper layer
+ *
+ */
+void irlmp_data_indication(struct lsap_cb *self, struct sk_buff *skb)
+{
+	/* Hide LMP header from layer above */
+	skb_pull(skb, LMP_HEADER);
+
+	if (self->notify.data_indication) {
+		/* Don't forget to refcount it - see irlap_driver_rcv(). */
+		skb_get(skb);
+		self->notify.data_indication(self->notify.instance, self, skb);
+	}
+}
+
+/*
+ * Function irlmp_udata_request (self, skb)
+ */
+int irlmp_udata_request(struct lsap_cb *self, struct sk_buff *userdata)
+{
+	int	ret;
+
+	IRDA_ASSERT(userdata != NULL, return -1;);
+
+	/* Make room for MUX header */
+	IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER, return -1;);
+	skb_push(userdata, LMP_HEADER);
+
+	ret = irlmp_do_lsap_event(self, LM_UDATA_REQUEST, userdata);
+
+	/* Drop reference count - see irlap_data_request(). */
+	dev_kfree_skb(userdata);
+
+	return ret;
+}
+
+/*
+ * Function irlmp_udata_indication (self, skb)
+ *
+ *    Send unreliable data (but still within the connection)
+ *
+ */
+void irlmp_udata_indication(struct lsap_cb *self, struct sk_buff *skb)
+{
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
+	IRDA_ASSERT(skb != NULL, return;);
+
+	/* Hide LMP header from layer above */
+	skb_pull(skb, LMP_HEADER);
+
+	if (self->notify.udata_indication) {
+		/* Don't forget to refcount it - see irlap_driver_rcv(). */
+		skb_get(skb);
+		self->notify.udata_indication(self->notify.instance, self,
+					      skb);
+	}
+}
+
+/*
+ * Function irlmp_connless_data_request (self, skb)
+ */
+#ifdef CONFIG_IRDA_ULTRA
+int irlmp_connless_data_request(struct lsap_cb *self, struct sk_buff *userdata,
+				__u8 pid)
+{
+	struct sk_buff *clone_skb;
+	struct lap_cb *lap;
+
+	IRDA_ASSERT(userdata != NULL, return -1;);
+
+	/* Make room for MUX and PID header */
+	IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER+LMP_PID_HEADER,
+		    return -1;);
+
+	/* Insert protocol identifier */
+	skb_push(userdata, LMP_PID_HEADER);
+	if(self != NULL)
+	  userdata->data[0] = self->pid;
+	else
+	  userdata->data[0] = pid;
+
+	/* Connectionless sockets must use 0x70 */
+	skb_push(userdata, LMP_HEADER);
+	userdata->data[0] = userdata->data[1] = LSAP_CONNLESS;
+
+	/* Try to send Connectionless  packets out on all links */
+	lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
+	while (lap != NULL) {
+		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return -1;);
+
+		clone_skb = skb_clone(userdata, GFP_ATOMIC);
+		if (!clone_skb) {
+			dev_kfree_skb(userdata);
+			return -ENOMEM;
+		}
+
+		irlap_unitdata_request(lap->irlap, clone_skb);
+		/* irlap_unitdata_request() don't increase refcount,
+		 * so no dev_kfree_skb() - Jean II */
+
+		lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
+	}
+	dev_kfree_skb(userdata);
+
+	return 0;
+}
+#endif /* CONFIG_IRDA_ULTRA */
+
+/*
+ * Function irlmp_connless_data_indication (self, skb)
+ *
+ *    Receive unreliable data outside any connection. Mostly used by Ultra
+ *
+ */
+#ifdef CONFIG_IRDA_ULTRA
+void irlmp_connless_data_indication(struct lsap_cb *self, struct sk_buff *skb)
+{
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
+	IRDA_ASSERT(skb != NULL, return;);
+
+	/* Hide LMP and PID header from layer above */
+	skb_pull(skb, LMP_HEADER+LMP_PID_HEADER);
+
+	if (self->notify.udata_indication) {
+		/* Don't forget to refcount it - see irlap_driver_rcv(). */
+		skb_get(skb);
+		self->notify.udata_indication(self->notify.instance, self,
+					      skb);
+	}
+}
+#endif /* CONFIG_IRDA_ULTRA */
+
+/*
+ * Propagate status indication from LAP to LSAPs (via LMP)
+ * This don't trigger any change of state in lap_cb, lmp_cb or lsap_cb,
+ * and the event is stateless, therefore we can bypass both state machines
+ * and send the event direct to the LSAP user.
+ * Jean II
+ */
+void irlmp_status_indication(struct lap_cb *self,
+			     LINK_STATUS link, LOCK_STATUS lock)
+{
+	struct lsap_cb *next;
+	struct lsap_cb *curr;
+
+	/* Send status_indication to all LSAPs using this link */
+	curr = (struct lsap_cb *) hashbin_get_first( self->lsaps);
+	while (NULL != hashbin_find_next(self->lsaps, (long) curr, NULL,
+					 (void *) &next) ) {
+		IRDA_ASSERT(curr->magic == LMP_LSAP_MAGIC, return;);
+		/*
+		 *  Inform service user if he has requested it
+		 */
+		if (curr->notify.status_indication != NULL)
+			curr->notify.status_indication(curr->notify.instance,
+						       link, lock);
+		else
+			pr_debug("%s(), no handler\n", __func__);
+
+		curr = next;
+	}
+}
+
+/*
+ * Receive flow control indication from LAP.
+ * LAP want us to send it one more frame. We implement a simple round
+ * robin scheduler between the active sockets so that we get a bit of
+ * fairness. Note that the round robin is far from perfect, but it's
+ * better than nothing.
+ * We then poll the selected socket so that we can do synchronous
+ * refilling of IrLAP (which allow to minimise the number of buffers).
+ * Jean II
+ */
+void irlmp_flow_indication(struct lap_cb *self, LOCAL_FLOW flow)
+{
+	struct lsap_cb *next;
+	struct lsap_cb *curr;
+	int	lsap_todo;
+
+	IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
+	IRDA_ASSERT(flow == FLOW_START, return;);
+
+	/* Get the number of lsap. That's the only safe way to know
+	 * that we have looped around... - Jean II */
+	lsap_todo = HASHBIN_GET_SIZE(self->lsaps);
+	pr_debug("%s() : %d lsaps to scan\n", __func__, lsap_todo);
+
+	/* Poll lsap in order until the queue is full or until we
+	 * tried them all.
+	 * Most often, the current LSAP will have something to send,
+	 * so we will go through this loop only once. - Jean II */
+	while((lsap_todo--) &&
+	      (IRLAP_GET_TX_QUEUE_LEN(self->irlap) < LAP_HIGH_THRESHOLD)) {
+		/* Try to find the next lsap we should poll. */
+		next = self->flow_next;
+		/* If we have no lsap, restart from first one */
+		if(next == NULL)
+			next = (struct lsap_cb *) hashbin_get_first(self->lsaps);
+		/* Verify current one and find the next one */
+		curr = hashbin_find_next(self->lsaps, (long) next, NULL,
+					 (void *) &self->flow_next);
+		/* Uh-oh... Paranoia */
+		if(curr == NULL)
+			break;
+		pr_debug("%s() : curr is %p, next was %p and is now %p, still %d to go - queue len = %d\n",
+			 __func__, curr, next, self->flow_next, lsap_todo,
+			 IRLAP_GET_TX_QUEUE_LEN(self->irlap));
+
+		/* Inform lsap user that it can send one more packet. */
+		if (curr->notify.flow_indication != NULL)
+			curr->notify.flow_indication(curr->notify.instance,
+						     curr, flow);
+		else
+			pr_debug("%s(), no handler\n", __func__);
+	}
+}
+
+#if 0
+/*
+ * Function irlmp_hint_to_service (hint)
+ *
+ *    Returns a list of all servics contained in the given hint bits. This
+ *    function assumes that the hint bits have the size of two bytes only
+ */
+__u8 *irlmp_hint_to_service(__u8 *hint)
+{
+	__u8 *service;
+	int i = 0;
+
+	/*
+	 * Allocate array to store services in. 16 entries should be safe
+	 * since we currently only support 2 hint bytes
+	 */
+	service = kmalloc(16, GFP_ATOMIC);
+	if (!service)
+		return NULL;
+
+	if (!hint[0]) {
+		pr_debug("<None>\n");
+		kfree(service);
+		return NULL;
+	}
+	if (hint[0] & HINT_PNP)
+		pr_debug("PnP Compatible ");
+	if (hint[0] & HINT_PDA)
+		pr_debug("PDA/Palmtop ");
+	if (hint[0] & HINT_COMPUTER)
+		pr_debug("Computer ");
+	if (hint[0] & HINT_PRINTER) {
+		pr_debug("Printer ");
+		service[i++] = S_PRINTER;
+	}
+	if (hint[0] & HINT_MODEM)
+		pr_debug("Modem ");
+	if (hint[0] & HINT_FAX)
+		pr_debug("Fax ");
+	if (hint[0] & HINT_LAN) {
+		pr_debug("LAN Access ");
+		service[i++] = S_LAN;
+	}
+	/*
+	 *  Test if extension byte exists. This byte will usually be
+	 *  there, but this is not really required by the standard.
+	 *  (IrLMP p. 29)
+	 */
+	if (hint[0] & HINT_EXTENSION) {
+		if (hint[1] & HINT_TELEPHONY) {
+			pr_debug("Telephony ");
+			service[i++] = S_TELEPHONY;
+		}
+		if (hint[1] & HINT_FILE_SERVER)
+			pr_debug("File Server ");
+
+		if (hint[1] & HINT_COMM) {
+			pr_debug("IrCOMM ");
+			service[i++] = S_COMM;
+		}
+		if (hint[1] & HINT_OBEX) {
+			pr_debug("IrOBEX ");
+			service[i++] = S_OBEX;
+		}
+	}
+	pr_debug("\n");
+
+	/* So that client can be notified about any discovery */
+	service[i++] = S_ANY;
+
+	service[i] = S_END;
+
+	return service;
+}
+#endif
+
+static const __u16 service_hint_mapping[S_END][2] = {
+	{ HINT_PNP,		0 },			/* S_PNP */
+	{ HINT_PDA,		0 },			/* S_PDA */
+	{ HINT_COMPUTER,	0 },			/* S_COMPUTER */
+	{ HINT_PRINTER,		0 },			/* S_PRINTER */
+	{ HINT_MODEM,		0 },			/* S_MODEM */
+	{ HINT_FAX,		0 },			/* S_FAX */
+	{ HINT_LAN,		0 },			/* S_LAN */
+	{ HINT_EXTENSION,	HINT_TELEPHONY },	/* S_TELEPHONY */
+	{ HINT_EXTENSION,	HINT_COMM },		/* S_COMM */
+	{ HINT_EXTENSION,	HINT_OBEX },		/* S_OBEX */
+	{ 0xFF,			0xFF },			/* S_ANY */
+};
+
+/*
+ * Function irlmp_service_to_hint (service)
+ *
+ *    Converts a service type, to a hint bit
+ *
+ *    Returns: a 16 bit hint value, with the service bit set
+ */
+__u16 irlmp_service_to_hint(int service)
+{
+	__u16_host_order hint;
+
+	hint.byte[0] = service_hint_mapping[service][0];
+	hint.byte[1] = service_hint_mapping[service][1];
+
+	return hint.word;
+}
+EXPORT_SYMBOL(irlmp_service_to_hint);
+
+/*
+ * Function irlmp_register_service (service)
+ *
+ *    Register local service with IrLMP
+ *
+ */
+void *irlmp_register_service(__u16 hints)
+{
+	irlmp_service_t *service;
+
+	pr_debug("%s(), hints = %04x\n", __func__, hints);
+
+	/* Make a new registration */
+	service = kmalloc(sizeof(irlmp_service_t), GFP_ATOMIC);
+	if (!service)
+		return NULL;
+
+	service->hints.word = hints;
+	hashbin_insert(irlmp->services, (irda_queue_t *) service,
+		       (long) service, NULL);
+
+	irlmp->hints.word |= hints;
+
+	return (void *)service;
+}
+EXPORT_SYMBOL(irlmp_register_service);
+
+/*
+ * Function irlmp_unregister_service (handle)
+ *
+ *    Unregister service with IrLMP.
+ *
+ *    Returns: 0 on success, -1 on error
+ */
+int irlmp_unregister_service(void *handle)
+{
+	irlmp_service_t *service;
+	unsigned long flags;
+
+	if (!handle)
+		return -1;
+
+	/* Caller may call with invalid handle (it's legal) - Jean II */
+	service = hashbin_lock_find(irlmp->services, (long) handle, NULL);
+	if (!service) {
+		pr_debug("%s(), Unknown service!\n", __func__);
+		return -1;
+	}
+
+	hashbin_remove_this(irlmp->services, (irda_queue_t *) service);
+	kfree(service);
+
+	/* Remove old hint bits */
+	irlmp->hints.word = 0;
+
+	/* Refresh current hint bits */
+	spin_lock_irqsave(&irlmp->services->hb_spinlock, flags);
+	service = (irlmp_service_t *) hashbin_get_first(irlmp->services);
+	while (service) {
+		irlmp->hints.word |= service->hints.word;
+
+		service = (irlmp_service_t *)hashbin_get_next(irlmp->services);
+	}
+	spin_unlock_irqrestore(&irlmp->services->hb_spinlock, flags);
+	return 0;
+}
+EXPORT_SYMBOL(irlmp_unregister_service);
+
+/*
+ * Function irlmp_register_client (hint_mask, callback1, callback2)
+ *
+ *    Register a local client with IrLMP
+ *	First callback is selective discovery (based on hints)
+ *	Second callback is for selective discovery expiries
+ *
+ *    Returns: handle > 0 on success, 0 on error
+ */
+void *irlmp_register_client(__u16 hint_mask, DISCOVERY_CALLBACK1 disco_clb,
+			    DISCOVERY_CALLBACK2 expir_clb, void *priv)
+{
+	irlmp_client_t *client;
+
+	IRDA_ASSERT(irlmp != NULL, return NULL;);
+
+	/* Make a new registration */
+	client = kmalloc(sizeof(irlmp_client_t), GFP_ATOMIC);
+	if (!client)
+		return NULL;
+
+	/* Register the details */
+	client->hint_mask.word = hint_mask;
+	client->disco_callback = disco_clb;
+	client->expir_callback = expir_clb;
+	client->priv = priv;
+
+	hashbin_insert(irlmp->clients, (irda_queue_t *) client,
+		       (long) client, NULL);
+
+	return (void *) client;
+}
+EXPORT_SYMBOL(irlmp_register_client);
+
+/*
+ * Function irlmp_update_client (handle, hint_mask, callback1, callback2)
+ *
+ *    Updates specified client (handle) with possibly new hint_mask and
+ *    callback
+ *
+ *    Returns: 0 on success, -1 on error
+ */
+int irlmp_update_client(void *handle, __u16 hint_mask,
+			DISCOVERY_CALLBACK1 disco_clb,
+			DISCOVERY_CALLBACK2 expir_clb, void *priv)
+{
+	irlmp_client_t *client;
+
+	if (!handle)
+		return -1;
+
+	client = hashbin_lock_find(irlmp->clients, (long) handle, NULL);
+	if (!client) {
+		pr_debug("%s(), Unknown client!\n", __func__);
+		return -1;
+	}
+
+	client->hint_mask.word = hint_mask;
+	client->disco_callback = disco_clb;
+	client->expir_callback = expir_clb;
+	client->priv = priv;
+
+	return 0;
+}
+EXPORT_SYMBOL(irlmp_update_client);
+
+/*
+ * Function irlmp_unregister_client (handle)
+ *
+ *    Returns: 0 on success, -1 on error
+ *
+ */
+int irlmp_unregister_client(void *handle)
+{
+	struct irlmp_client *client;
+
+	if (!handle)
+		return -1;
+
+	/* Caller may call with invalid handle (it's legal) - Jean II */
+	client = hashbin_lock_find(irlmp->clients, (long) handle, NULL);
+	if (!client) {
+		pr_debug("%s(), Unknown client!\n", __func__);
+		return -1;
+	}
+
+	pr_debug("%s(), removing client!\n", __func__);
+	hashbin_remove_this(irlmp->clients, (irda_queue_t *) client);
+	kfree(client);
+
+	return 0;
+}
+EXPORT_SYMBOL(irlmp_unregister_client);
+
+/*
+ * Function irlmp_slsap_inuse (slsap)
+ *
+ *    Check if the given source LSAP selector is in use
+ *
+ * This function is clearly not very efficient. On the mitigating side, the
+ * stack make sure that in 99% of the cases, we are called only once
+ * for each socket allocation. We could probably keep a bitmap
+ * of the allocated LSAP, but I'm not sure the complexity is worth it.
+ * Jean II
+ */
+static int irlmp_slsap_inuse(__u8 slsap_sel)
+{
+	struct lsap_cb *self;
+	struct lap_cb *lap;
+	unsigned long flags;
+
+	IRDA_ASSERT(irlmp != NULL, return TRUE;);
+	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return TRUE;);
+	IRDA_ASSERT(slsap_sel != LSAP_ANY, return TRUE;);
+
+#ifdef CONFIG_IRDA_ULTRA
+	/* Accept all bindings to the connectionless LSAP */
+	if (slsap_sel == LSAP_CONNLESS)
+		return FALSE;
+#endif /* CONFIG_IRDA_ULTRA */
+
+	/* Valid values are between 0 and 127 (0x0-0x6F) */
+	if (slsap_sel > LSAP_MAX)
+		return TRUE;
+
+	/*
+	 *  Check if slsap is already in use. To do this we have to loop over
+	 *  every IrLAP connection and check every LSAP associated with each
+	 *  the connection.
+	 */
+	spin_lock_irqsave_nested(&irlmp->links->hb_spinlock, flags,
+			SINGLE_DEPTH_NESTING);
+	lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
+	while (lap != NULL) {
+		IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, goto errlap;);
+
+		/* Careful for priority inversions here !
+		 * irlmp->links is never taken while another IrDA
+		 * spinlock is held, so we are safe. Jean II */
+		spin_lock(&lap->lsaps->hb_spinlock);
+
+		/* For this IrLAP, check all the LSAPs */
+		self = (struct lsap_cb *) hashbin_get_first(lap->lsaps);
+		while (self != NULL) {
+			IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC,
+				    goto errlsap;);
+
+			if ((self->slsap_sel == slsap_sel)) {
+				pr_debug("Source LSAP selector=%02x in use\n",
+					 self->slsap_sel);
+				goto errlsap;
+			}
+			self = (struct lsap_cb*) hashbin_get_next(lap->lsaps);
+		}
+		spin_unlock(&lap->lsaps->hb_spinlock);
+
+		/* Next LAP */
+		lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
+	}
+	spin_unlock_irqrestore(&irlmp->links->hb_spinlock, flags);
+
+	/*
+	 * Server sockets are typically waiting for connections and
+	 * therefore reside in the unconnected list. We don't want
+	 * to give out their LSAPs for obvious reasons...
+	 * Jean II
+	 */
+	spin_lock_irqsave(&irlmp->unconnected_lsaps->hb_spinlock, flags);
+
+	self = (struct lsap_cb *) hashbin_get_first(irlmp->unconnected_lsaps);
+	while (self != NULL) {
+		IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, goto erruncon;);
+		if ((self->slsap_sel == slsap_sel)) {
+			pr_debug("Source LSAP selector=%02x in use (unconnected)\n",
+				 self->slsap_sel);
+			goto erruncon;
+		}
+		self = (struct lsap_cb*) hashbin_get_next(irlmp->unconnected_lsaps);
+	}
+	spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
+
+	return FALSE;
+
+	/* Error exit from within one of the two nested loops.
+	 * Make sure we release the right spinlock in the righ order.
+	 * Jean II */
+errlsap:
+	spin_unlock(&lap->lsaps->hb_spinlock);
+IRDA_ASSERT_LABEL(errlap:)
+	spin_unlock_irqrestore(&irlmp->links->hb_spinlock, flags);
+	return TRUE;
+
+	/* Error exit from within the unconnected loop.
+	 * Just one spinlock to release... Jean II */
+erruncon:
+	spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
+	return TRUE;
+}
+
+/*
+ * Function irlmp_find_free_slsap ()
+ *
+ *    Find a free source LSAP to use. This function is called if the service
+ *    user has requested a source LSAP equal to LM_ANY
+ */
+static __u8 irlmp_find_free_slsap(void)
+{
+	__u8 lsap_sel;
+	int wrapped = 0;
+
+	IRDA_ASSERT(irlmp != NULL, return -1;);
+	IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return -1;);
+
+	/* Most users don't really care which LSAPs they are given,
+	 * and therefore we automatically give them a free LSAP.
+	 * This function try to find a suitable LSAP, i.e. which is
+	 * not in use and is within the acceptable range. Jean II */
+
+	do {
+		/* Always increment to LSAP number before using it.
+		 * In theory, we could reuse the last LSAP number, as long
+		 * as it is no longer in use. Some IrDA stack do that.
+		 * However, the previous socket may be half closed, i.e.
+		 * we closed it, we think it's no longer in use, but the
+		 * other side did not receive our close and think it's
+		 * active and still send data on it.
+		 * This is similar to what is done with PIDs and TCP ports.
+		 * Also, this reduce the number of calls to irlmp_slsap_inuse()
+		 * which is an expensive function to call.
+		 * Jean II */
+		irlmp->last_lsap_sel++;
+
+		/* Check if we need to wraparound (0x70-0x7f are reserved) */
+		if (irlmp->last_lsap_sel > LSAP_MAX) {
+			/* 0x00-0x10 are also reserved for well know ports */
+			irlmp->last_lsap_sel = 0x10;
+
+			/* Make sure we terminate the loop */
+			if (wrapped++) {
+				net_err_ratelimited("%s: no more free LSAPs !\n",
+						    __func__);
+				return 0;
+			}
+		}
+
+		/* If the LSAP is in use, try the next one.
+		 * Despite the autoincrement, we need to check if the lsap
+		 * is really in use or not, first because LSAP may be
+		 * directly allocated in irlmp_open_lsap(), and also because
+		 * we may wraparound on old sockets. Jean II */
+	} while (irlmp_slsap_inuse(irlmp->last_lsap_sel));
+
+	/* Got it ! */
+	lsap_sel = irlmp->last_lsap_sel;
+	pr_debug("%s(), found free lsap_sel=%02x\n",
+		 __func__, lsap_sel);
+
+	return lsap_sel;
+}
+
+/*
+ * Function irlmp_convert_lap_reason (lap_reason)
+ *
+ *    Converts IrLAP disconnect reason codes to IrLMP disconnect reason
+ *    codes
+ *
+ */
+LM_REASON irlmp_convert_lap_reason( LAP_REASON lap_reason)
+{
+	int reason = LM_LAP_DISCONNECT;
+
+	switch (lap_reason) {
+	case LAP_DISC_INDICATION: /* Received a disconnect request from peer */
+		pr_debug("%s(), LAP_DISC_INDICATION\n", __func__);
+		reason = LM_USER_REQUEST;
+		break;
+	case LAP_NO_RESPONSE:    /* To many retransmits without response */
+		pr_debug("%s(), LAP_NO_RESPONSE\n", __func__);
+		reason = LM_LAP_DISCONNECT;
+		break;
+	case LAP_RESET_INDICATION:
+		pr_debug("%s(), LAP_RESET_INDICATION\n", __func__);
+		reason = LM_LAP_RESET;
+		break;
+	case LAP_FOUND_NONE:
+	case LAP_MEDIA_BUSY:
+	case LAP_PRIMARY_CONFLICT:
+		pr_debug("%s(), LAP_FOUND_NONE, LAP_MEDIA_BUSY or LAP_PRIMARY_CONFLICT\n",
+			 __func__);
+		reason = LM_CONNECT_FAILURE;
+		break;
+	default:
+		pr_debug("%s(), Unknown IrLAP disconnect reason %d!\n",
+			 __func__, lap_reason);
+		reason = LM_LAP_DISCONNECT;
+		break;
+	}
+
+	return reason;
+}
+
+#ifdef CONFIG_PROC_FS
+
+struct irlmp_iter_state {
+	hashbin_t *hashbin;
+};
+
+#define LSAP_START_TOKEN	((void *)1)
+#define LINK_START_TOKEN	((void *)2)
+
+static void *irlmp_seq_hb_idx(struct irlmp_iter_state *iter, loff_t *off)
+{
+	void *element;
+
+	spin_lock_irq(&iter->hashbin->hb_spinlock);
+	for (element = hashbin_get_first(iter->hashbin);
+	     element != NULL;
+	     element = hashbin_get_next(iter->hashbin)) {
+		if (!off || *off-- == 0) {
+			/* NB: hashbin left locked */
+			return element;
+		}
+	}
+	spin_unlock_irq(&iter->hashbin->hb_spinlock);
+	iter->hashbin = NULL;
+	return NULL;
+}
+
+
+static void *irlmp_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	struct irlmp_iter_state *iter = seq->private;
+	void *v;
+	loff_t off = *pos;
+
+	iter->hashbin = NULL;
+	if (off-- == 0)
+		return LSAP_START_TOKEN;
+
+	iter->hashbin = irlmp->unconnected_lsaps;
+	v = irlmp_seq_hb_idx(iter, &off);
+	if (v)
+		return v;
+
+	if (off-- == 0)
+		return LINK_START_TOKEN;
+
+	iter->hashbin = irlmp->links;
+	return irlmp_seq_hb_idx(iter, &off);
+}
+
+static void *irlmp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct irlmp_iter_state *iter = seq->private;
+
+	++*pos;
+
+	if (v == LSAP_START_TOKEN) {		/* start of list of lsaps */
+		iter->hashbin = irlmp->unconnected_lsaps;
+		v = irlmp_seq_hb_idx(iter, NULL);
+		return v ? v : LINK_START_TOKEN;
+	}
+
+	if (v == LINK_START_TOKEN) {		/* start of list of links */
+		iter->hashbin = irlmp->links;
+		return irlmp_seq_hb_idx(iter, NULL);
+	}
+
+	v = hashbin_get_next(iter->hashbin);
+
+	if (v == NULL) {			/* no more in this hash bin */
+		spin_unlock_irq(&iter->hashbin->hb_spinlock);
+
+		if (iter->hashbin == irlmp->unconnected_lsaps)
+			v =  LINK_START_TOKEN;
+
+		iter->hashbin = NULL;
+	}
+	return v;
+}
+
+static void irlmp_seq_stop(struct seq_file *seq, void *v)
+{
+	struct irlmp_iter_state *iter = seq->private;
+
+	if (iter->hashbin)
+		spin_unlock_irq(&iter->hashbin->hb_spinlock);
+}
+
+static int irlmp_seq_show(struct seq_file *seq, void *v)
+{
+	const struct irlmp_iter_state *iter = seq->private;
+	struct lsap_cb *self = v;
+
+	if (v == LSAP_START_TOKEN)
+		seq_puts(seq, "Unconnected LSAPs:\n");
+	else if (v == LINK_START_TOKEN)
+		seq_puts(seq, "\nRegistered Link Layers:\n");
+	else if (iter->hashbin == irlmp->unconnected_lsaps) {
+		self = v;
+		IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -EINVAL; );
+		seq_printf(seq, "lsap state: %s, ",
+			   irlsap_state[ self->lsap_state]);
+		seq_printf(seq,
+			   "slsap_sel: %#02x, dlsap_sel: %#02x, ",
+			   self->slsap_sel, self->dlsap_sel);
+		seq_printf(seq, "(%s)", self->notify.name);
+		seq_printf(seq, "\n");
+	} else if (iter->hashbin == irlmp->links) {
+		struct lap_cb *lap = v;
+
+		seq_printf(seq, "lap state: %s, ",
+			   irlmp_state[lap->lap_state]);
+
+		seq_printf(seq, "saddr: %#08x, daddr: %#08x, ",
+			   lap->saddr, lap->daddr);
+		seq_printf(seq, "num lsaps: %d",
+			   HASHBIN_GET_SIZE(lap->lsaps));
+		seq_printf(seq, "\n");
+
+		/* Careful for priority inversions here !
+		 * All other uses of attrib spinlock are independent of
+		 * the object spinlock, so we are safe. Jean II */
+		spin_lock(&lap->lsaps->hb_spinlock);
+
+		seq_printf(seq, "\n  Connected LSAPs:\n");
+		for (self = (struct lsap_cb *) hashbin_get_first(lap->lsaps);
+		     self != NULL;
+		     self = (struct lsap_cb *)hashbin_get_next(lap->lsaps)) {
+			IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC,
+				    goto outloop;);
+			seq_printf(seq, "  lsap state: %s, ",
+				   irlsap_state[ self->lsap_state]);
+			seq_printf(seq,
+				   "slsap_sel: %#02x, dlsap_sel: %#02x, ",
+				   self->slsap_sel, self->dlsap_sel);
+			seq_printf(seq, "(%s)", self->notify.name);
+			seq_putc(seq, '\n');
+
+		}
+	IRDA_ASSERT_LABEL(outloop:)
+		spin_unlock(&lap->lsaps->hb_spinlock);
+		seq_putc(seq, '\n');
+	} else
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct seq_operations irlmp_seq_ops = {
+	.start  = irlmp_seq_start,
+	.next   = irlmp_seq_next,
+	.stop   = irlmp_seq_stop,
+	.show   = irlmp_seq_show,
+};
+
+static int irlmp_seq_open(struct inode *inode, struct file *file)
+{
+	IRDA_ASSERT(irlmp != NULL, return -EINVAL;);
+
+	return seq_open_private(file, &irlmp_seq_ops,
+			sizeof(struct irlmp_iter_state));
+}
+
+const struct file_operations irlmp_seq_fops = {
+	.owner		= THIS_MODULE,
+	.open           = irlmp_seq_open,
+	.read           = seq_read,
+	.llseek         = seq_lseek,
+	.release	= seq_release_private,
+};
+
+#endif /* PROC_FS */