Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

Conflicts:

	drivers/net/wireless/iwlwifi/iwl4965-base.c

22 files changed, 112 insertions, 76 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index f6944ec..472676d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2107,6 +2107,10 @@ int netif_receive_skb(struct sk_buff *skb)
 
 	rcu_read_lock();
 
+	/* Don't receive packets in an exiting network namespace */
+	if (!net_alive(dev_net(skb->dev)))
+		goto out;
+
 #ifdef CONFIG_NET_CLS_ACT
 	if (skb->tc_verd & TC_NCLS) {
 		skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
@@ -3034,7 +3038,7 @@ EXPORT_SYMBOL(dev_unicast_delete);
 /**
  *	dev_unicast_add		- add a secondary unicast address
  *	@dev: device
- *	@addr: address to delete
+ *	@addr: address to add
  *	@alen: length of @addr
  *
  *	Add a secondary unicast address to the device or increase
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 72b4c18..7c52fe2 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -140,6 +140,9 @@ static void cleanup_net(struct work_struct *work)
 	struct pernet_operations *ops;
 	struct net *net;
 
+	/* Be very certain incoming network packets will not find us */
+	rcu_barrier();
+
 	net = container_of(work, struct net, work);
 
 	mutex_lock(&net_mutex);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 2df012b..7c57156 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1290,12 +1290,14 @@ static int __skb_splice_bits(struct sk_buff *skb, unsigned int *offset,
 {
 	unsigned int nr_pages = spd->nr_pages;
 	unsigned int poff, plen, len, toff, tlen;
-	int headlen, seg;
+	int headlen, seg, error = 0;
 
 	toff = *offset;
 	tlen = *total_len;
-	if (!tlen)
+	if (!tlen) {
+		error = 1;
 		goto err;
+	}
 
 	/*
 	 * if the offset is greater than the linear part, go directly to
@@ -1337,7 +1339,8 @@ static int __skb_splice_bits(struct sk_buff *skb, unsigned int *offset,
 		 * just jump directly to update and return, no point
 		 * in going over fragments when the output is full.
 		 */
-		if (spd_fill_page(spd, virt_to_page(p), plen, poff, skb))
+		error = spd_fill_page(spd, virt_to_page(p), plen, poff, skb);
+		if (error)
 			goto done;
 
 		tlen -= plen;
@@ -1367,7 +1370,8 @@ map_frag:
 		if (!plen)
 			break;
 
-		if (spd_fill_page(spd, f->page, plen, poff, skb))
+		error = spd_fill_page(spd, f->page, plen, poff, skb);
+		if (error)
 			break;
 
 		tlen -= plen;
@@ -1380,7 +1384,10 @@ done:
 		return 0;
 	}
 err:
-	return 1;
+	/* update the offset to reflect the linear part skip, if any */
+	if (!error)
+		*offset = toff;
+	return error;
 }
 
 /*
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index 4ed429b..0546a0b 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -192,14 +192,21 @@ EXPORT_SYMBOL(inet_frag_evictor);
 
 static struct inet_frag_queue *inet_frag_intern(struct netns_frags *nf,
 		struct inet_frag_queue *qp_in, struct inet_frags *f,
-		unsigned int hash, void *arg)
+		void *arg)
 {
 	struct inet_frag_queue *qp;
 #ifdef CONFIG_SMP
 	struct hlist_node *n;
 #endif
+	unsigned int hash;
 
 	write_lock(&f->lock);
+	/*
+	 * While we stayed w/o the lock other CPU could update
+	 * the rnd seed, so we need to re-calculate the hash
+	 * chain. Fortunatelly the qp_in can be used to get one.
+	 */
+	hash = f->hashfn(qp_in);
 #ifdef CONFIG_SMP
 	/* With SMP race we have to recheck hash table, because
 	 * such entry could be created on other cpu, while we
@@ -247,7 +254,7 @@ static struct inet_frag_queue *inet_frag_alloc(struct netns_frags *nf,
 }
 
 static struct inet_frag_queue *inet_frag_create(struct netns_frags *nf,
-		struct inet_frags *f, void *arg, unsigned int hash)
+		struct inet_frags *f, void *arg)
 {
 	struct inet_frag_queue *q;
 
@@ -255,7 +262,7 @@ static struct inet_frag_queue *inet_frag_create(struct netns_frags *nf,
 	if (q == NULL)
 		return NULL;
 
-	return inet_frag_intern(nf, q, f, hash, arg);
+	return inet_frag_intern(nf, q, f, arg);
 }
 
 struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
@@ -264,7 +271,6 @@ struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
 	struct inet_frag_queue *q;
 	struct hlist_node *n;
 
-	read_lock(&f->lock);
 	hlist_for_each_entry(q, n, &f->hash[hash], list) {
 		if (q->net == nf && f->match(q, key)) {
 			atomic_inc(&q->refcnt);
@@ -274,6 +280,6 @@ struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
 	}
 	read_unlock(&f->lock);
 
-	return inet_frag_create(nf, f, key, hash);
+	return inet_frag_create(nf, f, key);
 }
 EXPORT_SYMBOL(inet_frag_find);
diff --git a/net/ipv4/inet_lro.c b/net/ipv4/inet_lro.c
index 4a4d49f..cfd034a 100644
--- a/net/ipv4/inet_lro.c
+++ b/net/ipv4/inet_lro.c
@@ -383,8 +383,7 @@ static int __lro_proc_skb(struct net_lro_mgr *lro_mgr, struct sk_buff *skb,
 out2: /* send aggregated SKBs to stack */
 	lro_flush(lro_mgr, lro_desc);
 
-out:  /* Original SKB has to be posted to stack */
-	skb->ip_summed = lro_mgr->ip_summed;
+out:
 	return 1;
 }
 
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 91e3214..fbd5804 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -227,6 +227,8 @@ static inline struct ipq *ip_find(struct net *net, struct iphdr *iph, u32 user)
 
 	arg.iph = iph;
 	arg.user = user;
+
+	read_lock(&ip4_frags.lock);
 	hash = ipqhashfn(iph->id, iph->saddr, iph->daddr, iph->protocol);
 
 	q = inet_frag_find(&net->ipv4.frags, &ip4_frags, &arg, hash);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index cf0850c..c66ac83 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -258,6 +258,8 @@
 #include <linux/socket.h>
 #include <linux/random.h>
 #include <linux/bootmem.h>
+#include <linux/highmem.h>
+#include <linux/swap.h>
 #include <linux/cache.h>
 #include <linux/err.h>
 #include <linux/crypto.h>
@@ -2688,7 +2690,7 @@ __setup("thash_entries=", set_thash_entries);
 void __init tcp_init(void)
 {
 	struct sk_buff *skb = NULL;
-	unsigned long limit;
+	unsigned long nr_pages, limit;
 	int order, i, max_share;
 
 	BUILD_BUG_ON(sizeof(struct tcp_skb_cb) > sizeof(skb->cb));
@@ -2757,8 +2759,9 @@ void __init tcp_init(void)
 	 * is up to 1/2 at 256 MB, decreasing toward zero with the amount of
 	 * memory, with a floor of 128 pages.
 	 */
-	limit = min(nr_all_pages, 1UL<<(28-PAGE_SHIFT)) >> (20-PAGE_SHIFT);
-	limit = (limit * (nr_all_pages >> (20-PAGE_SHIFT))) >> (PAGE_SHIFT-11);
+	nr_pages = totalram_pages - totalhigh_pages;
+	limit = min(nr_pages, 1UL<<(28-PAGE_SHIFT)) >> (20-PAGE_SHIFT);
+	limit = (limit * (nr_pages >> (20-PAGE_SHIFT))) >> (PAGE_SHIFT-11);
 	limit = max(limit, 128UL);
 	sysctl_tcp_mem[0] = limit / 4 * 3;
 	sysctl_tcp_mem[1] = limit;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 0db9b75..4300bcf 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2189,7 +2189,7 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len)
 	}
 
 	seq_printf(f, "%4d: %08X:%04X %08X:%04X %02X %08X:%08X %02X:%08lX "
-			"%08X %5d %8d %lu %d %p %u %u %u %u %d%n",
+			"%08X %5d %8d %lu %d %p %lu %lu %u %u %d%n",
 		i, src, srcp, dest, destp, sk->sk_state,
 		tp->write_seq - tp->snd_una,
 		sk->sk_state == TCP_LISTEN ? sk->sk_ack_backlog :
@@ -2201,8 +2201,8 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len)
 		icsk->icsk_probes_out,
 		sock_i_ino(sk),
 		atomic_read(&sk->sk_refcnt), sk,
-		icsk->icsk_rto,
-		icsk->icsk_ack.ato,
+		jiffies_to_clock_t(icsk->icsk_rto),
+		jiffies_to_clock_t(icsk->icsk_ack.ato),
 		(icsk->icsk_ack.quick << 1) | icsk->icsk_ack.pingpong,
 		tp->snd_cwnd,
 		tp->snd_ssthresh >= 0xFFFF ? -1 : tp->snd_ssthresh,
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index f77a601..34e5a96 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -100,6 +100,15 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 	if (hdr->version != 6)
 		goto err;
 
+	/*
+	 * RFC4291 2.5.3
+	 * A packet received on an interface with a destination address
+	 * of loopback must be dropped.
+	 */
+	if (!(dev->flags & IFF_LOOPBACK) &&
+	    ipv6_addr_loopback(&hdr->daddr))
+		goto err;
+
 	skb->transport_header = skb->network_header + sizeof(*hdr);
 	IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
 
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index a998884..030c0c9 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -343,18 +343,21 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	case IPV6_DSTOPTS:
 	{
 		struct ipv6_txoptions *opt;
+
+		/* remove any sticky options header with a zero option
+		 * length, per RFC3542.
+		 */
 		if (optlen == 0)
 			optval = NULL;
+		else if (optlen < sizeof(struct ipv6_opt_hdr) ||
+			 optlen & 0x7 || optlen > 8 * 255)
+			goto e_inval;
 
 		/* hop-by-hop / destination options are privileged option */
 		retv = -EPERM;
 		if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
 			break;
 
-		if (optlen < sizeof(struct ipv6_opt_hdr) ||
-		    optlen & 0x7 || optlen > 8 * 255)
-			goto e_inval;
-
 		opt = ipv6_renew_options(sk, np->opt, optname,
 					 (struct ipv6_opt_hdr __user *)optval,
 					 optlen);
diff --git a/net/ipv6/netfilter/ip6table_mangle.c b/net/ipv6/netfilter/ip6table_mangle.c
index 27a5e8b..f405cea 100644
--- a/net/ipv6/netfilter/ip6table_mangle.c
+++ b/net/ipv6/netfilter/ip6table_mangle.c
@@ -129,7 +129,7 @@ static struct nf_hook_ops ip6t_ops[] __read_mostly = {
 		.priority	= NF_IP6_PRI_MANGLE,
 	},
 	{
-		.hook		= ip6t_local_hook,
+		.hook		= ip6t_route_hook,
 		.owner		= THIS_MODULE,
 		.pf		= PF_INET6,
 		.hooknum	= NF_INET_LOCAL_IN,
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index e65e26e..cf20bc4 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -207,9 +207,10 @@ fq_find(__be32 id, struct in6_addr *src, struct in6_addr *dst)
 	arg.id = id;
 	arg.src = src;
 	arg.dst = dst;
+
+	read_lock_bh(&nf_frags.lock);
 	hash = ip6qhashfn(id, src, dst);
 
-	local_bh_disable();
 	q = inet_frag_find(&nf_init_frags, &nf_frags, &arg, hash);
 	local_bh_enable();
 	if (q == NULL)
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 13509f9..6ab957e 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -245,6 +245,8 @@ fq_find(struct net *net, __be32 id, struct in6_addr *src, struct in6_addr *dst,
 	arg.id = id;
 	arg.src = src;
 	arg.dst = dst;
+
+	read_lock(&ip6_frags.lock);
 	hash = ip6qhashfn(id, src, dst);
 
 	q = inet_frag_find(&net->ipv6.frags, &ip6_frags, &arg, hash);
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index efe036a..751e98f 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -238,7 +238,7 @@ static inline int rt6_need_strict(struct in6_addr *daddr)
 static inline struct rt6_info *rt6_device_match(struct net *net,
 						    struct rt6_info *rt,
 						    int oif,
-						    int strict)
+						    int flags)
 {
 	struct rt6_info *local = NULL;
 	struct rt6_info *sprt;
@@ -251,7 +251,7 @@ static inline struct rt6_info *rt6_device_match(struct net *net,
 			if (dev->flags & IFF_LOOPBACK) {
 				if (sprt->rt6i_idev == NULL ||
 				    sprt->rt6i_idev->dev->ifindex != oif) {
-					if (strict && oif)
+					if (flags & RT6_LOOKUP_F_IFACE && oif)
 						continue;
 					if (local && (!oif ||
 						      local->rt6i_idev->dev->ifindex == oif))
@@ -264,7 +264,7 @@ static inline struct rt6_info *rt6_device_match(struct net *net,
 		if (local)
 			return local;
 
-		if (strict)
+		if (flags & RT6_LOOKUP_F_IFACE)
 			return net->ipv6.ip6_null_entry;
 	}
 	return rt;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 09be09c..30dbab7 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1946,7 +1946,7 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
 
 	seq_printf(seq,
 		   "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
-		   "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %u %u %u %u %d\n",
+		   "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %lu %lu %u %u %d\n",
 		   i,
 		   src->s6_addr32[0], src->s6_addr32[1],
 		   src->s6_addr32[2], src->s6_addr32[3], srcp,
@@ -1962,8 +1962,8 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
 		   icsk->icsk_probes_out,
 		   sock_i_ino(sp),
 		   atomic_read(&sp->sk_refcnt), sp,
-		   icsk->icsk_rto,
-		   icsk->icsk_ack.ato,
+		   jiffies_to_clock_t(icsk->icsk_rto),
+		   jiffies_to_clock_t(icsk->icsk_ack.ato),
 		   (icsk->icsk_ack.quick << 1 ) | icsk->icsk_ack.pingpong,
 		   tp->snd_cwnd, tp->snd_ssthresh>=0xFFFF?-1:tp->snd_ssthresh
 		   );
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index d4893bd..6597c77 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -387,6 +387,15 @@ void ieee80211_key_free(struct ieee80211_key *key)
 	if (!key)
 		return;
 
+	if (!key->sdata) {
+		/* The key has not been linked yet, simply free it
+		 * and don't Oops */
+		if (key->conf.alg == ALG_CCMP)
+			ieee80211_aes_key_free(key->u.ccmp.tfm);
+		kfree(key);
+		return;
+	}
+
 	spin_lock_irqsave(&key->sdata->local->key_lock, flags);
 	__ieee80211_key_free(key);
 	spin_unlock_irqrestore(&key->sdata->local->key_lock, flags);
diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index 0099da5..52b2611 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -1534,7 +1534,7 @@ static int netlbl_unlabel_staticlistdef(struct sk_buff *skb,
 		}
 	}
 	list_for_each_entry_rcu(addr6, &iface->addr6_list, list) {
-		if (addr6->valid || iter_addr6++ < skip_addr6)
+		if (!addr6->valid || iter_addr6++ < skip_addr6)
 			continue;
 		if (netlbl_unlabel_staticlist_gen(NLBL_UNLABEL_C_STATICLISTDEF,
 					   iface,
diff --git a/net/netlink/attr.c b/net/netlink/attr.c
index 47bbf45..2d106cf 100644
--- a/net/netlink/attr.c
+++ b/net/netlink/attr.c
@@ -132,6 +132,7 @@ errout:
  * @maxtype: maximum attribute type to be expected
  * @head: head of attribute stream
  * @len: length of attribute stream
+ * @policy: validation policy
  *
  * Parses a stream of attributes and stores a pointer to each attribute in
  * the tb array accessable via the attribute type. Attributes with a type
@@ -194,7 +195,7 @@ struct nlattr *nla_find(struct nlattr *head, int len, int attrtype)
 /**
  * nla_strlcpy - Copy string attribute payload into a sized buffer
  * @dst: where to copy the string to
- * @src: attribute to copy the string from
+ * @nla: attribute to copy the string from
  * @dstsize: size of destination buffer
  *
  * Copies at most dstsize - 1 bytes into the destination buffer.
@@ -340,9 +341,9 @@ struct nlattr *nla_reserve(struct sk_buff *skb, int attrtype, int attrlen)
 }
 
 /**
- * nla_reserve - reserve room for attribute without header
+ * nla_reserve_nohdr - reserve room for attribute without header
  * @skb: socket buffer to reserve room on
- * @len: length of attribute payload
+ * @attrlen: length of attribute payload
  *
  * Reserves room for attribute payload without a header.
  *
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index 82adfe6..9437b27 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -106,17 +106,6 @@ config NET_SCH_PRIO
 	  To compile this code as a module, choose M here: the
 	  module will be called sch_prio.
 
-config NET_SCH_RR
-	tristate "Multi Band Round Robin Queuing (RR)"
-	select NET_SCH_PRIO
-	---help---
-	  Say Y here if you want to use an n-band round robin packet
-	  scheduler.
-
-	  The module uses sch_prio for its framework and is aliased as
-	  sch_rr, so it will load sch_prio, although it is referred
-	  to using sch_rr.
-
 config NET_SCH_RED
 	tristate "Random Early Detection (RED)"
 	---help---
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index d355e5e..13afa72 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -468,7 +468,7 @@ struct Qdisc *qdisc_alloc(struct net_device *dev, struct Qdisc_ops *ops)
 
 	return sch;
 errout:
-	return ERR_PTR(-err);
+	return ERR_PTR(err);
 }
 
 struct Qdisc * qdisc_create_dflt(struct net_device *dev, struct Qdisc_ops *ops,
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index f98650c..43460a1 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4512,7 +4512,9 @@ static int sctp_getsockopt_local_addrs_old(struct sock *sk, int len,
 	if (copy_from_user(&getaddrs, optval, len))
 		return -EFAULT;
 
-	if (getaddrs.addr_num <= 0) return -EINVAL;
+	if (getaddrs.addr_num <= 0 ||
+	    getaddrs.addr_num >= (INT_MAX / sizeof(union sctp_addr)))
+		return -EINVAL;
 	/*
 	 *  For UDP-style sockets, id specifies the association to query.
 	 *  If the id field is set to the value '0' then the locally bound
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index b428049..70ceb16 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -485,8 +485,8 @@ static int unix_socketpair(struct socket *, struct socket *);
 static int unix_accept(struct socket *, struct socket *, int);
 static int unix_getname(struct socket *, struct sockaddr *, int *, int);
 static unsigned int unix_poll(struct file *, struct socket *, poll_table *);
-static unsigned int unix_datagram_poll(struct file *, struct socket *,
-				       poll_table *);
+static unsigned int unix_dgram_poll(struct file *, struct socket *,
+				    poll_table *);
 static int unix_ioctl(struct socket *, unsigned int, unsigned long);
 static int unix_shutdown(struct socket *, int);
 static int unix_stream_sendmsg(struct kiocb *, struct socket *,
@@ -532,7 +532,7 @@ static const struct proto_ops unix_dgram_ops = {
 	.socketpair =	unix_socketpair,
 	.accept =	sock_no_accept,
 	.getname =	unix_getname,
-	.poll =		unix_datagram_poll,
+	.poll =		unix_dgram_poll,
 	.ioctl =	unix_ioctl,
 	.listen =	sock_no_listen,
 	.shutdown =	unix_shutdown,
@@ -553,7 +553,7 @@ static const struct proto_ops unix_seqpacket_ops = {
 	.socketpair =	unix_socketpair,
 	.accept =	unix_accept,
 	.getname =	unix_getname,
-	.poll =		unix_datagram_poll,
+	.poll =		unix_dgram_poll,
 	.ioctl =	unix_ioctl,
 	.listen =	unix_listen,
 	.shutdown =	unix_shutdown,
@@ -1992,29 +1992,13 @@ static unsigned int unix_poll(struct file * file, struct socket *sock, poll_tabl
 	return mask;
 }
 
-static unsigned int unix_datagram_poll(struct file *file, struct socket *sock,
-				       poll_table *wait)
+static unsigned int unix_dgram_poll(struct file *file, struct socket *sock,
+				    poll_table *wait)
 {
-	struct sock *sk = sock->sk, *peer;
-	unsigned int mask;
+	struct sock *sk = sock->sk, *other;
+	unsigned int mask, writable;
 
 	poll_wait(file, sk->sk_sleep, wait);
-
-	peer = unix_peer_get(sk);
-	if (peer) {
-		if (peer != sk) {
-			/*
-			 * Writability of a connected socket additionally
-			 * depends on the state of the receive queue of the
-			 * peer.
-			 */
-			poll_wait(file, &unix_sk(peer)->peer_wait, wait);
-		} else {
-			sock_put(peer);
-			peer = NULL;
-		}
-	}
-
 	mask = 0;
 
 	/* exceptional events? */
@@ -2040,14 +2024,26 @@ static unsigned int unix_datagram_poll(struct file *file, struct socket *sock,
 	}
 
 	/* writable? */
-	if (unix_writable(sk) && !(peer && unix_recvq_full(peer)))
+	writable = unix_writable(sk);
+	if (writable) {
+		other = unix_peer_get(sk);
+		if (other) {
+			if (unix_peer(other) != sk) {
+				poll_wait(file, &unix_sk(other)->peer_wait,
+					  wait);
+				if (unix_recvq_full(other))
+					writable = 0;
+			}
+
+			sock_put(other);
+		}
+	}
+
+	if (writable)
 		mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
 	else
 		set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
 
-	if (peer)
-		sock_put(peer);
-
 	return mask;
 }