3 files changed, 31 insertions, 1 deletions

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index c2f3a72712ce..635e1faec412 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -339,6 +339,31 @@ static inline int vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
         }
 }
 
+/**
+ * vlan_get_protocol - get protocol EtherType.
+ * @skb: skbuff to query
+ *
+ * Returns the EtherType of the packet, regardless of whether it is
+ * vlan encapsulated (normal or hardware accelerated) or not.
+ */
+static inline __be16 vlan_get_protocol(const struct sk_buff *skb)
+{
+        __be16 protocol = 0;
+
+        if (vlan_tx_tag_present(skb) ||
+             skb->protocol != cpu_to_be16(ETH_P_8021Q))
+                protocol = skb->protocol;
+        else {
+                __be16 proto, *protop;
+                protop = skb_header_pointer(skb, offsetof(struct vlan_ethhdr,
+                                                h_vlan_encapsulated_proto),
+                                                sizeof(proto), &proto);
+                if (likely(protop))
+                        protocol = *protop;
+        }
+
+        return protocol;
+}
 #endif /* __KERNEL__ */
 
 /* VLAN IOCTLs are found in sockios.h */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 072652d94d9f..d8fd2c23a1b9 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1554,6 +1554,11 @@ static inline void netif_tx_wake_all_queues(struct net_device *dev)
 
 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
 {
+        if (WARN_ON(!dev_queue)) {
+                printk(KERN_INFO "netif_stop_queue() cannot be called before "
+                       "register_netdev()");
+                return;
+        }
         set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
 }
 
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 89341c32631a..03317c8d4077 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -215,7 +215,7 @@ NF_HOOK_COND(uint8_t pf, unsigned int hook, struct sk_buff *skb,
         int ret;
 
         if (!cond ||
-            (ret = nf_hook_thresh(pf, hook, skb, in, out, okfn, INT_MIN) == 1))
+            ((ret = nf_hook_thresh(pf, hook, skb, in, out, okfn, INT_MIN)) == 1))
                 ret = okfn(skb);
         return ret;
 }