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:
  ipsec: Fix deadlock in xfrm_state management.
  ipv: Re-enable IP when MTU > 68
  net/xfrm: Use an IS_ERR test rather than a NULL test
  ath9: Fix ath_rx_flush_tid() for IRQs disabled kernel warning message.
  ath9k: Incorrect key used when group and pairwise ciphers are different.
  rt2x00: Compiler warning unmasked by fix of BUILD_BUG_ON
  mac80211: Fix debugfs union misuse and pointer corruption
  wireless/libertas/if_cs.c: fix memory leaks
  orinoco: Multicast to the specified addresses
  iwlwifi: fix 64bit platform firmware loading
  iwlwifi: fix apm_stop (wrong bit polarity for FLAG_INIT_DONE)
  iwlwifi: workaround interrupt handling no some platforms
  iwlwifi: do not use GFP_DMA in iwl_tx_queue_init
  net/wireless/Kconfig: clarify the description for CONFIG_WIRELESS_EXT_SYSFS
  net: Unbreak userspace usage of linux/mroute.h
  pkt_sched: Fix locking of qdisc_root with qdisc_root_sleeping_lock()
  ipv6: When we droped a packet, we should return NET_RX_DROP instead of 0

14 files changed, 59 insertions, 35 deletions

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 91d3d96..b12dae2 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1029,6 +1029,11 @@ skip:
 	}
 }
 
+static inline bool inetdev_valid_mtu(unsigned mtu)
+{
+	return mtu >= 68;
+}
+
 /* Called only under RTNL semaphore */
 
 static int inetdev_event(struct notifier_block *this, unsigned long event,
@@ -1048,6 +1053,10 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
 				IN_DEV_CONF_SET(in_dev, NOXFRM, 1);
 				IN_DEV_CONF_SET(in_dev, NOPOLICY, 1);
 			}
+		} else if (event == NETDEV_CHANGEMTU) {
+			/* Re-enabling IP */
+			if (inetdev_valid_mtu(dev->mtu))
+				in_dev = inetdev_init(dev);
 		}
 		goto out;
 	}
@@ -1058,7 +1067,7 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
 		dev->ip_ptr = NULL;
 		break;
 	case NETDEV_UP:
-		if (dev->mtu < 68)
+		if (!inetdev_valid_mtu(dev->mtu))
 			break;
 		if (dev->flags & IFF_LOOPBACK) {
 			struct in_ifaddr *ifa;
@@ -1080,9 +1089,9 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
 		ip_mc_down(in_dev);
 		break;
 	case NETDEV_CHANGEMTU:
-		if (dev->mtu >= 68)
+		if (inetdev_valid_mtu(dev->mtu))
 			break;
-		/* MTU falled under 68, disable IP */
+		/* disable IP when MTU is not enough */
 	case NETDEV_UNREGISTER:
 		inetdev_destroy(in_dev);
 		break;
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 01d4767..e53e493 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -377,14 +377,14 @@ static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
 	    skb_checksum_complete(skb)) {
 		atomic_inc(&sk->sk_drops);
 		kfree_skb(skb);
-		return 0;
+		return NET_RX_DROP;
 	}
 
 	/* Charge it to the socket. */
 	if (sock_queue_rcv_skb(sk,skb)<0) {
 		atomic_inc(&sk->sk_drops);
 		kfree_skb(skb);
-		return 0;
+		return NET_RX_DROP;
 	}
 
 	return 0;
@@ -429,7 +429,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
 		if (skb_checksum_complete(skb)) {
 			atomic_inc(&sk->sk_drops);
 			kfree_skb(skb);
-			return 0;
+			return NET_RX_DROP;
 		}
 	}
 
diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
index 7439b63..cf82ace 100644
--- a/net/mac80211/debugfs_key.c
+++ b/net/mac80211/debugfs_key.c
@@ -265,7 +265,7 @@ void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
 	key = sdata->default_key;
 	if (key) {
 		sprintf(buf, "../keys/%d", key->debugfs.cnt);
-		sdata->debugfs.default_key =
+		sdata->common_debugfs.default_key =
 			debugfs_create_symlink("default_key",
 					       sdata->debugfsdir, buf);
 	} else
@@ -277,8 +277,8 @@ void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
 	if (!sdata)
 		return;
 
-	debugfs_remove(sdata->debugfs.default_key);
-	sdata->debugfs.default_key = NULL;
+	debugfs_remove(sdata->common_debugfs.default_key);
+	sdata->common_debugfs.default_key = NULL;
 }
 
 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 586a9b4..4498d87 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -496,8 +496,10 @@ struct ieee80211_sub_if_data {
 		struct {
 			struct dentry *mode;
 		} monitor;
-		struct dentry *default_key;
 	} debugfs;
+	struct {
+		struct dentry *default_key;
+	} common_debugfs;
 
 #ifdef CONFIG_MAC80211_MESH
 	struct dentry *mesh_stats_dir;
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 5cafdd4..8eb79e9 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -205,7 +205,7 @@ replay:
 		}
 	}
 
-	root_lock = qdisc_root_lock(q);
+	root_lock = qdisc_root_sleeping_lock(q);
 
 	if (tp == NULL) {
 		/* Proto-tcf does not exist, create new one */
diff --git a/net/sched/cls_route.c b/net/sched/cls_route.c
index 481260a..e3d8455 100644
--- a/net/sched/cls_route.c
+++ b/net/sched/cls_route.c
@@ -75,7 +75,7 @@ static __inline__ int route4_fastmap_hash(u32 id, int iif)
 static inline
 void route4_reset_fastmap(struct Qdisc *q, struct route4_head *head, u32 id)
 {
-	spinlock_t *root_lock = qdisc_root_lock(q);
+	spinlock_t *root_lock = qdisc_root_sleeping_lock(q);
 
 	spin_lock_bh(root_lock);
 	memset(head->fastmap, 0, sizeof(head->fastmap));
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 506b709..1122c95 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1169,8 +1169,8 @@ static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid,
 	if (q->stab && qdisc_dump_stab(skb, q->stab) < 0)
 		goto nla_put_failure;
 
-	if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS,
-					 TCA_XSTATS, qdisc_root_lock(q), &d) < 0)
+	if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
+					 qdisc_root_sleeping_lock(q), &d) < 0)
 		goto nla_put_failure;
 
 	if (q->ops->dump_stats && q->ops->dump_stats(q, &d) < 0)
@@ -1461,8 +1461,8 @@ static int tc_fill_tclass(struct sk_buff *skb, struct Qdisc *q,
 	if (cl_ops->dump && cl_ops->dump(q, cl, skb, tcm) < 0)
 		goto nla_put_failure;
 
-	if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS,
-					 TCA_XSTATS, qdisc_root_lock(q), &d) < 0)
+	if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS, TCA_XSTATS,
+					 qdisc_root_sleeping_lock(q), &d) < 0)
 		goto nla_put_failure;
 
 	if (cl_ops->dump_stats && cl_ops->dump_stats(q, cl, &d) < 0)
diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index 9b720ad..8b06fa9 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1754,7 +1754,7 @@ static void cbq_put(struct Qdisc *sch, unsigned long arg)
 
 	if (--cl->refcnt == 0) {
 #ifdef CONFIG_NET_CLS_ACT
-		spinlock_t *root_lock = qdisc_root_lock(sch);
+		spinlock_t *root_lock = qdisc_root_sleeping_lock(sch);
 		struct cbq_sched_data *q = qdisc_priv(sch);
 
 		spin_lock_bh(root_lock);
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 97d4761..d14f020 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1043,7 +1043,7 @@ static int htb_init(struct Qdisc *sch, struct nlattr *opt)
 
 static int htb_dump(struct Qdisc *sch, struct sk_buff *skb)
 {
-	spinlock_t *root_lock = qdisc_root_lock(sch);
+	spinlock_t *root_lock = qdisc_root_sleeping_lock(sch);
 	struct htb_sched *q = qdisc_priv(sch);
 	struct nlattr *nest;
 	struct tc_htb_glob gopt;
@@ -1075,7 +1075,7 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
 			  struct sk_buff *skb, struct tcmsg *tcm)
 {
 	struct htb_class *cl = (struct htb_class *)arg;
-	spinlock_t *root_lock = qdisc_root_lock(sch);
+	spinlock_t *root_lock = qdisc_root_sleeping_lock(sch);
 	struct nlattr *nest;
 	struct tc_htb_opt opt;
 
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index fb0294d..3781e55 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -341,7 +341,7 @@ static int get_dist_table(struct Qdisc *sch, const struct nlattr *attr)
 	for (i = 0; i < n; i++)
 		d->table[i] = data[i];
 
-	root_lock = qdisc_root_lock(sch);
+	root_lock = qdisc_root_sleeping_lock(sch);
 
 	spin_lock_bh(root_lock);
 	d = xchg(&q->delay_dist, d);
diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c
index 2c35c67..d35ef05 100644
--- a/net/sched/sch_teql.c
+++ b/net/sched/sch_teql.c
@@ -161,7 +161,7 @@ teql_destroy(struct Qdisc* sch)
 						txq = netdev_get_tx_queue(master->dev, 0);
 						master->slaves = NULL;
 
-						root_lock = qdisc_root_lock(txq->qdisc);
+						root_lock = qdisc_root_sleeping_lock(txq->qdisc);
 						spin_lock_bh(root_lock);
 						qdisc_reset(txq->qdisc);
 						spin_unlock_bh(root_lock);
diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
index ab015c6..833b024 100644
--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -39,4 +39,5 @@ config WIRELESS_EXT_SYSFS
 	  files in /sys/class/net/*/wireless/. The same information
 	  is available via the ioctls as well.
 
-	  Say Y if you have programs using it (we don't know of any).
+	  Say Y if you have programs using it, like old versions of
+	  hal.
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 841b32a..46914b7 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1731,8 +1731,7 @@ restart:
 			 * We can't enlist stable bundles either.
 			 */
 			write_unlock_bh(&policy->lock);
-			if (dst)
-				dst_free(dst);
+			dst_free(dst);
 
 			if (pol_dead)
 				XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLDEAD);
@@ -1748,8 +1747,7 @@ restart:
 			err = xfrm_dst_update_origin(dst, fl);
 		if (unlikely(err)) {
 			write_unlock_bh(&policy->lock);
-			if (dst)
-				dst_free(dst);
+			dst_free(dst);
 			XFRM_INC_STATS(LINUX_MIB_XFRMOUTBUNDLECHECKERROR);
 			goto error;
 		}
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 4c6914e..7bd62f6 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -780,11 +780,13 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 {
 	unsigned int h;
 	struct hlist_node *entry;
-	struct xfrm_state *x, *x0;
+	struct xfrm_state *x, *x0, *to_put;
 	int acquire_in_progress = 0;
 	int error = 0;
 	struct xfrm_state *best = NULL;
 
+	to_put = NULL;
+
 	spin_lock_bh(&xfrm_state_lock);
 	h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family);
 	hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
@@ -833,7 +835,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 		if (tmpl->id.spi &&
 		    (x0 = __xfrm_state_lookup(daddr, tmpl->id.spi,
 					      tmpl->id.proto, family)) != NULL) {
-			xfrm_state_put(x0);
+			to_put = x0;
 			error = -EEXIST;
 			goto out;
 		}
@@ -849,7 +851,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 		error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid);
 		if (error) {
 			x->km.state = XFRM_STATE_DEAD;
-			xfrm_state_put(x);
+			to_put = x;
 			x = NULL;
 			goto out;
 		}
@@ -870,7 +872,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 			xfrm_hash_grow_check(x->bydst.next != NULL);
 		} else {
 			x->km.state = XFRM_STATE_DEAD;
-			xfrm_state_put(x);
+			to_put = x;
 			x = NULL;
 			error = -ESRCH;
 		}
@@ -881,6 +883,8 @@ out:
 	else
 		*err = acquire_in_progress ? -EAGAIN : error;
 	spin_unlock_bh(&xfrm_state_lock);
+	if (to_put)
+		xfrm_state_put(to_put);
 	return x;
 }
 
@@ -1067,18 +1071,20 @@ static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq);
 
 int xfrm_state_add(struct xfrm_state *x)
 {
-	struct xfrm_state *x1;
+	struct xfrm_state *x1, *to_put;
 	int family;
 	int err;
 	int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
 
 	family = x->props.family;
 
+	to_put = NULL;
+
 	spin_lock_bh(&xfrm_state_lock);
 
 	x1 = __xfrm_state_locate(x, use_spi, family);
 	if (x1) {
-		xfrm_state_put(x1);
+		to_put = x1;
 		x1 = NULL;
 		err = -EEXIST;
 		goto out;
@@ -1088,7 +1094,7 @@ int xfrm_state_add(struct xfrm_state *x)
 		x1 = __xfrm_find_acq_byseq(x->km.seq);
 		if (x1 && ((x1->id.proto != x->id.proto) ||
 		    xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
-			xfrm_state_put(x1);
+			to_put = x1;
 			x1 = NULL;
 		}
 	}
@@ -1110,6 +1116,9 @@ out:
 		xfrm_state_put(x1);
 	}
 
+	if (to_put)
+		xfrm_state_put(to_put);
+
 	return err;
 }
 EXPORT_SYMBOL(xfrm_state_add);
@@ -1269,10 +1278,12 @@ EXPORT_SYMBOL(xfrm_state_migrate);
 
 int xfrm_state_update(struct xfrm_state *x)
 {
-	struct xfrm_state *x1;
+	struct xfrm_state *x1, *to_put;
 	int err;
 	int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
 
+	to_put = NULL;
+
 	spin_lock_bh(&xfrm_state_lock);
 	x1 = __xfrm_state_locate(x, use_spi, x->props.family);
 
@@ -1281,7 +1292,7 @@ int xfrm_state_update(struct xfrm_state *x)
 		goto out;
 
 	if (xfrm_state_kern(x1)) {
-		xfrm_state_put(x1);
+		to_put = x1;
 		err = -EEXIST;
 		goto out;
 	}
@@ -1295,6 +1306,9 @@ int xfrm_state_update(struct xfrm_state *x)
 out:
 	spin_unlock_bh(&xfrm_state_lock);
 
+	if (to_put)
+		xfrm_state_put(to_put);
+
 	if (err)
 		return err;