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

Pull networking fixes from David Miller:

1) GRE tunnel drivers don't set the transport header properly, they also
   blindly deref the inner protocol ipv4 and needs some checks.  Fixes
   from Isaku Yamahata.

2) Fix sleeps while atomic in netdevice rename code, from Eric Dumazet.

3) Fix double-spinlock in solos-pci driver, from Dan Carpenter.

4) More ARP bug fixes.  Fix lockdep splat in arp_solicit() and then the
   bug accidentally added by that fix.  From Eric Dumazet and Cong Wang.

5) Remove some __dev* annotations that slipped back in, as well as all
   HOTPLUG references.  From Greg KH

6) RDS protocol uses wrong interfaces to access scatter-gather elements,
   causing a regression.  From Mike Marciniszyn.

7) Fix build error in cpts driver, from Richard Cochran.

8) Fix arithmetic in packet scheduler, from Stefan Hasko.

9) Similarly, fix association during calculation of random backoff in
   batman-adv.  From Akinobu Mita.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (21 commits)
  ipv6/ip6_gre: set transport header correctly
  ipv4/ip_gre: set transport header correctly to gre header
  IB/rds: suppress incompatible protocol when version is known
  IB/rds: Correct ib_api use with gs_dma_address/sg_dma_len
  net/vxlan: Use the underlying device index when joining/leaving multicast groups
  tcp: should drop incoming frames without ACK flag set
  netprio_cgroup: define sk_cgrp_prioidx only if NETPRIO_CGROUP is enabled
  cpts: fix a run time warn_on.
  cpts: fix build error by removing useless code.
  batman-adv: fix random jitter calculation
  arp: fix a regression in arp_solicit()
  net: sched: integer overflow fix
  CONFIG_HOTPLUG removal from networking core
  Drivers: network: more __dev* removal
  bridge: call br_netpoll_disable in br_add_if
  ipv4: arp: fix a lockdep splat in arp_solicit()
  tuntap: dont use a private kmem_cache
  net: devnet_rename_seq should be a seqcount
  ip_gre: fix possible use after free
  ip_gre: make ipgre_tunnel_xmit() not parse network header as IP unconditionally
  ...

1 files changed, 3 insertions, 21 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 504f7f1cad9..fbd106edbe5 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -180,7 +180,6 @@ struct tun_struct {
 	int debug;
 #endif
 	spinlock_t lock;
-	struct kmem_cache *flow_cache;
 	struct hlist_head flows[TUN_NUM_FLOW_ENTRIES];
 	struct timer_list flow_gc_timer;
 	unsigned long ageing_time;
@@ -209,8 +208,8 @@ static struct tun_flow_entry *tun_flow_create(struct tun_struct *tun,
 					      struct hlist_head *head,
 					      u32 rxhash, u16 queue_index)
 {
-	struct tun_flow_entry *e = kmem_cache_alloc(tun->flow_cache,
-						    GFP_ATOMIC);
+	struct tun_flow_entry *e = kmalloc(sizeof(*e), GFP_ATOMIC);
+
 	if (e) {
 		tun_debug(KERN_INFO, tun, "create flow: hash %u index %u\n",
 			  rxhash, queue_index);
@@ -223,19 +222,12 @@ static struct tun_flow_entry *tun_flow_create(struct tun_struct *tun,
 	return e;
 }
 
-static void tun_flow_free(struct rcu_head *head)
-{
-	struct tun_flow_entry *e
-		= container_of(head, struct tun_flow_entry, rcu);
-	kmem_cache_free(e->tun->flow_cache, e);
-}
-
 static void tun_flow_delete(struct tun_struct *tun, struct tun_flow_entry *e)
 {
 	tun_debug(KERN_INFO, tun, "delete flow: hash %u index %u\n",
 		  e->rxhash, e->queue_index);
 	hlist_del_rcu(&e->hash_link);
-	call_rcu(&e->rcu, tun_flow_free);
+	kfree_rcu(e, rcu);
 }
 
 static void tun_flow_flush(struct tun_struct *tun)
@@ -833,12 +825,6 @@ static int tun_flow_init(struct tun_struct *tun)
 {
 	int i;
 
-	tun->flow_cache = kmem_cache_create("tun_flow_cache",
-					    sizeof(struct tun_flow_entry), 0, 0,
-					    NULL);
-	if (!tun->flow_cache)
-		return -ENOMEM;
-
 	for (i = 0; i < TUN_NUM_FLOW_ENTRIES; i++)
 		INIT_HLIST_HEAD(&tun->flows[i]);
 
@@ -854,10 +840,6 @@ static void tun_flow_uninit(struct tun_struct *tun)
 {
 	del_timer_sync(&tun->flow_gc_timer);
 	tun_flow_flush(tun);
-
-	/* Wait for completion of call_rcu()'s */
-	rcu_barrier();
-	kmem_cache_destroy(tun->flow_cache);
 }
 
 /* Initialize net device. */