Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  [LRO]: fix lro_gen_skb() alignment
  [TCP]: NAGLE_PUSH seems to be a wrong way around
  [TCP]: Move prior_in_flight collect to more robust place
  [TCP] FRTO: Use of existing funcs make code more obvious & robust
  [IRDA]: Move ircomm_tty_line_info() under #ifdef CONFIG_PROC_FS
  [ROSE]: Trivial compilation CONFIG_INET=n case
  [IPVS]: Fix sched registration race when checking for name collision.
  [IPVS]: Don't leak sysctl tables if the scheduler registration fails.

drivers/net/myri10ge/myri10ge.c

@@ -1979,6 +1979,7 @@ static int myri10ge_open(struct net_device *dev)
 	lro_mgr->lro_arr = mgp->rx_done.lro_desc;
 	lro_mgr->get_frag_header = myri10ge_get_frag_header;
 	lro_mgr->max_aggr = myri10ge_lro_max_pkts;
+	lro_mgr->frag_align_pad = 2;
 	if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
 		lro_mgr->max_aggr = MAX_SKB_FRAGS;
 

include/linux/inet_lro.h

@@ -91,6 +91,9 @@ struct net_lro_mgr {
 	int max_desc; /* Max number of LRO descriptors  */
 	int max_aggr; /* Max number of LRO packets to be aggregated */
 
+	int frag_align_pad; /* Padding required to properly align layer 3
+			     * headers in generated skb when using frags */
+
 	struct net_lro_desc *lro_arr; /* Array of LRO descriptors */
 
 	/*

net/ipv4/inet_lro.c

@@ -401,10 +401,11 @@ static struct sk_buff *lro_gen_skb(struct net_lro_mgr *lro_mgr,
 	int data_len = len;
 	int hdr_len = min(len, hlen);
 
-	skb = netdev_alloc_skb(lro_mgr->dev, hlen);
+	skb = netdev_alloc_skb(lro_mgr->dev, hlen + lro_mgr->frag_align_pad);
 	if (!skb)
 		return NULL;
 
+	skb_reserve(skb, lro_mgr->frag_align_pad);
 	skb->len = len;
 	skb->data_len = len - hdr_len;
 	skb->truesize += true_size;

net/ipv4/ipvs/ip_vs_lblc.c

@@ -580,9 +580,14 @@ static struct ip_vs_scheduler ip_vs_lblc_scheduler =
 
 static int __init ip_vs_lblc_init(void)
 {
+	int ret;
+
 	INIT_LIST_HEAD(&ip_vs_lblc_scheduler.n_list);
 	sysctl_header = register_sysctl_table(lblc_root_table);
-	return register_ip_vs_scheduler(&ip_vs_lblc_scheduler);
+	ret = register_ip_vs_scheduler(&ip_vs_lblc_scheduler);
+	if (ret)
+		unregister_sysctl_table(sysctl_header);
+	return ret;
 }
 
 

net/ipv4/ipvs/ip_vs_lblcr.c

@@ -769,9 +769,14 @@ static struct ip_vs_scheduler ip_vs_lblcr_scheduler =
 
 static int __init ip_vs_lblcr_init(void)
 {
+	int ret;
+
 	INIT_LIST_HEAD(&ip_vs_lblcr_scheduler.n_list);
 	sysctl_header = register_sysctl_table(lblcr_root_table);
-	return register_ip_vs_scheduler(&ip_vs_lblcr_scheduler);
+	ret = register_ip_vs_scheduler(&ip_vs_lblcr_scheduler);
+	if (ret)
+		unregister_sysctl_table(sysctl_header);
+	return ret;
 }
 
 

net/ipv4/ipvs/ip_vs_sched.c

@@ -183,19 +183,6 @@ int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler)
 	/* increase the module use count */
 	ip_vs_use_count_inc();
 
-	/*
-	 *  Make sure that the scheduler with this name doesn't exist
-	 *  in the scheduler list.
-	 */
-	sched = ip_vs_sched_getbyname(scheduler->name);
-	if (sched) {
-		ip_vs_scheduler_put(sched);
-		ip_vs_use_count_dec();
-		IP_VS_ERR("register_ip_vs_scheduler(): [%s] scheduler "
-			  "already existed in the system\n", scheduler->name);
-		return -EINVAL;
-	}
-
 	write_lock_bh(&__ip_vs_sched_lock);
 
 	if (scheduler->n_list.next != &scheduler->n_list) {
@@ -206,6 +193,20 @@ int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler)
 		return -EINVAL;
 	}
 
+	/*
+	 *  Make sure that the scheduler with this name doesn't exist
+	 *  in the scheduler list.
+	 */
+	list_for_each_entry(sched, &ip_vs_schedulers, n_list) {
+		if (strcmp(scheduler->name, sched->name) == 0) {
+			write_unlock_bh(&__ip_vs_sched_lock);
+			ip_vs_use_count_dec();
+			IP_VS_ERR("register_ip_vs_scheduler(): [%s] scheduler "
+					"already existed in the system\n",
+					scheduler->name);
+			return -EINVAL;
+		}
+	}
 	/*
 	 *	Add it into the d-linked scheduler list
 	 */

net/ipv4/tcp_input.c

@@ -3003,17 +3003,13 @@ static int tcp_process_frto(struct sock *sk, int flag)
 	}
 
 	if (tp->frto_counter == 1) {
-		/* Sending of the next skb must be allowed or no F-RTO */
-		if (!tcp_send_head(sk) ||
-		    after(TCP_SKB_CB(tcp_send_head(sk))->end_seq,
-				     tp->snd_una + tp->snd_wnd)) {
-			tcp_enter_frto_loss(sk, (tp->frto_counter == 1 ? 2 : 3),
-					    flag);
-			return 1;
-		}
-
+		/* tcp_may_send_now needs to see updated state */
 		tp->snd_cwnd = tcp_packets_in_flight(tp) + 2;
 		tp->frto_counter = 2;
+
+		if (!tcp_may_send_now(sk))
+			tcp_enter_frto_loss(sk, 2, flag);
+
 		return 1;
 	} else {
 		switch (sysctl_tcp_frto_response) {
@@ -3069,6 +3065,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
 	}
 
 	prior_fackets = tp->fackets_out;
+	prior_in_flight = tcp_packets_in_flight(tp);
 
 	if (!(flag&FLAG_SLOWPATH) && after(ack, prior_snd_una)) {
 		/* Window is constant, pure forward advance.
@@ -3108,8 +3105,6 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
 	if (!prior_packets)
 		goto no_queue;
 
-	prior_in_flight = tcp_packets_in_flight(tp);
-
 	/* See if we can take anything off of the retransmit queue. */
 	flag |= tcp_clean_rtx_queue(sk, &seq_rtt, prior_fackets);
 

net/ipv4/tcp_output.c

@@ -1162,8 +1162,7 @@ int tcp_may_send_now(struct sock *sk)
 	return (skb &&
 		tcp_snd_test(sk, skb, tcp_current_mss(sk, 1),
 			     (tcp_skb_is_last(sk, skb) ?
-			      TCP_NAGLE_PUSH :
-			      tp->nonagle)));
+			      tp->nonagle : TCP_NAGLE_PUSH)));
 }
 
 /* Trim TSO SKB to LEN bytes, put the remaining data into a new packet

net/irda/ircomm/ircomm_tty.c

@@ -1245,6 +1245,7 @@ static void ircomm_tty_flow_indication(void *instance, void *sap,
 	self->flow = cmd;
 }
 
+#ifdef CONFIG_PROC_FS
 static int ircomm_tty_line_info(struct ircomm_tty_cb *self, char *buf)
 {
 	int  ret=0;
@@ -1354,7 +1355,6 @@ static int ircomm_tty_line_info(struct ircomm_tty_cb *self, char *buf)
  *
  *
  */
-#ifdef CONFIG_PROC_FS
 static int ircomm_tty_read_proc(char *buf, char **start, off_t offset, int len,
 				int *eof, void *unused)
 {

net/rose/rose_dev.c

@@ -55,13 +55,13 @@ static int rose_header(struct sk_buff *skb, struct net_device *dev,
 
 static int rose_rebuild_header(struct sk_buff *skb)
 {
+#ifdef CONFIG_INET
 	struct net_device *dev = skb->dev;
 	struct net_device_stats *stats = netdev_priv(dev);
 	unsigned char *bp = (unsigned char *)skb->data;
 	struct sk_buff *skbn;
 	unsigned int len;
 
-#ifdef CONFIG_INET
 	if (arp_find(bp + 7, skb)) {
 		return 1;
 	}