annotate cxgb3 (ab)uses of skb->priority/skb->csum

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 19 insertions, 3 deletions

diff --git a/drivers/net/cxgb3/cxgb3_offload.c b/drivers/net/cxgb3/cxgb3_offload.c
index 901c824bfe6d..ff9c013ce535 100644
--- a/drivers/net/cxgb3/cxgb3_offload.c
+++ b/drivers/net/cxgb3/cxgb3_offload.c
@@ -833,10 +833,26 @@ static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
         return 0;
 }
 
+/*
+ * That skb would better have come from process_responses() where we abuse
+ * ->priority and ->csum to carry our data.  NB: if we get to per-arch
+ * ->csum, the things might get really interesting here.
+ */
+
+static inline u32 get_hwtid(struct sk_buff *skb)
+{
+        return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
+}
+
+static inline u32 get_opcode(struct sk_buff *skb)
+{
+        return G_OPCODE(ntohl((__force __be32)skb->csum));
+}
+
 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 {
-        unsigned int hwtid = ntohl(skb->priority) >> 8 & 0xfffff;
-        unsigned int opcode = G_OPCODE(ntohl(skb->csum));
+        unsigned int hwtid = get_hwtid(skb);
+        unsigned int opcode = get_opcode(skb);
         struct t3c_tid_entry *t3c_tid;
 
         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
@@ -914,7 +930,7 @@ int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
 {
         while (n--) {
                 struct sk_buff *skb = *skbs++;
-                unsigned int opcode = G_OPCODE(ntohl(skb->csum));
+                unsigned int opcode = get_opcode(skb);
                 int ret = cpl_handlers[opcode] (dev, skb);
 
 #if VALIDATE_TID