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

Conflicts:
	drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

4 files changed, 60 insertions, 20 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 73e87c7b4377..d70e4a3a49f2 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6313,7 +6313,8 @@ static struct hlist_head *netdev_create_hash(void)
 /* Initialize per network namespace state */
 static int __net_init netdev_init(struct net *net)
 {
-        INIT_LIST_HEAD(&net->dev_base_head);
+        if (net != &init_net)
+                INIT_LIST_HEAD(&net->dev_base_head);
 
         net->dev_name_head = netdev_create_hash();
         if (net->dev_name_head == NULL)
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index dddbacb8f28c..42f1e1c7514f 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -27,7 +27,9 @@ static DEFINE_MUTEX(net_mutex);
 LIST_HEAD(net_namespace_list);
 EXPORT_SYMBOL_GPL(net_namespace_list);
 
-struct net init_net;
+struct net init_net = {
+        .dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head),
+};
 EXPORT_SYMBOL(init_net);
 
 #define INITIAL_NET_GEN_PTRS    13 /* +1 for len +2 for rcu_head */
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 3e953eaddbfc..b2e9caa1ad1a 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -65,7 +65,7 @@ static void put_prioidx(u32 idx)
         spin_unlock_irqrestore(&prioidx_map_lock, flags);
 }
 
-static void extend_netdev_table(struct net_device *dev, u32 new_len)
+static int extend_netdev_table(struct net_device *dev, u32 new_len)
 {
         size_t new_size = sizeof(struct netprio_map) +
                            ((sizeof(u32) * new_len));
@@ -77,7 +77,7 @@ static void extend_netdev_table(struct net_device *dev, u32 new_len)
 
         if (!new_priomap) {
                 pr_warn("Unable to alloc new priomap!\n");
-                return;
+                return -ENOMEM;
         }
 
         for (i = 0;
@@ -90,46 +90,79 @@ static void extend_netdev_table(struct net_device *dev, u32 new_len)
         rcu_assign_pointer(dev->priomap, new_priomap);
         if (old_priomap)
                 kfree_rcu(old_priomap, rcu);
+        return 0;
 }
 
-static void update_netdev_tables(void)
+static int write_update_netdev_table(struct net_device *dev)
 {
+        int ret = 0;
+        u32 max_len;
+        struct netprio_map *map;
+
+        rtnl_lock();
+        max_len = atomic_read(&max_prioidx) + 1;
+        map = rtnl_dereference(dev->priomap);
+        if (!map || map->priomap_len < max_len)
+                ret = extend_netdev_table(dev, max_len);
+        rtnl_unlock();
+
+        return ret;
+}
+
+static int update_netdev_tables(void)
+{
+        int ret = 0;
         struct net_device *dev;
-        u32 max_len = atomic_read(&max_prioidx) + 1;
+        u32 max_len;
         struct netprio_map *map;
 
         rtnl_lock();
+        max_len = atomic_read(&max_prioidx) + 1;
         for_each_netdev(&init_net, dev) {
                 map = rtnl_dereference(dev->priomap);
-                if ((!map) ||
-                    (map->priomap_len < max_len))
-                        extend_netdev_table(dev, max_len);
+                /*
+                 * don't allocate priomap if we didn't
+                 * change net_prio.ifpriomap (map == NULL),
+                 * this will speed up skb_update_prio.
+                 */
+                if (map && map->priomap_len < max_len) {
+                        ret = extend_netdev_table(dev, max_len);
+                        if (ret < 0)
+                                break;
+                }
         }
         rtnl_unlock();
+        return ret;
 }
 
 static struct cgroup_subsys_state *cgrp_create(struct cgroup *cgrp)
 {
         struct cgroup_netprio_state *cs;
-        int ret;
+        int ret = -EINVAL;
 
         cs = kzalloc(sizeof(*cs), GFP_KERNEL);
         if (!cs)
                 return ERR_PTR(-ENOMEM);
 
-        if (cgrp->parent && cgrp_netprio_state(cgrp->parent)->prioidx) {
-                kfree(cs);
-                return ERR_PTR(-EINVAL);
-        }
+        if (cgrp->parent && cgrp_netprio_state(cgrp->parent)->prioidx)
+                goto out;
 
         ret = get_prioidx(&cs->prioidx);
-        if (ret != 0) {
+        if (ret < 0) {
                 pr_warn("No space in priority index array\n");
-                kfree(cs);
-                return ERR_PTR(ret);
+                goto out;
+        }
+
+        ret = update_netdev_tables();
+        if (ret < 0) {
+                put_prioidx(cs->prioidx);
+                goto out;
         }
 
         return &cs->css;
+out:
+        kfree(cs);
+        return ERR_PTR(ret);
 }
 
 static void cgrp_destroy(struct cgroup *cgrp)
@@ -221,13 +254,17 @@ static int write_priomap(struct cgroup *cgrp, struct cftype *cft,
         if (!dev)
                 goto out_free_devname;
 
-        update_netdev_tables();
-        ret = 0;
+        ret = write_update_netdev_table(dev);
+        if (ret < 0)
+                goto out_put_dev;
+
         rcu_read_lock();
         map = rcu_dereference(dev->priomap);
         if (map)
                 map->priomap[prioidx] = priority;
         rcu_read_unlock();
+
+out_put_dev:
         dev_put(dev);
 
 out_free_devname:
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index c011d7fab62d..ccfcb7d8711e 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -365,7 +365,7 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
         unsigned int fragsz = SKB_DATA_ALIGN(length + NET_SKB_PAD) +
                               SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 
-        if (fragsz <= PAGE_SIZE && !(gfp_mask & __GFP_WAIT)) {
+        if (fragsz <= PAGE_SIZE && !(gfp_mask & (__GFP_WAIT | GFP_DMA))) {
                 void *data = netdev_alloc_frag(fragsz);
 
                 if (likely(data)) {