[PATCH 2/3] Fix partial csum tx handling

[Mark McLoughlin <markmc@redhat.com>]

Older kernels didn't have the csum_start/csum_offset
skb members, but skb->csum did contain the offset into
the transport header of the csum field and csum->h
contained a pointer to the transport layer header.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
---
 hack-module.awk |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/hack-module.awk b/hack-module.awk
index b687951..d04c3b6 100644
--- a/hack-module.awk
+++ b/hack-module.awk
@@ -124,10 +124,17 @@
 
 /ip_summed == CHECKSUM_PARTIAL\)/ {
     print "#ifdef COMPAT_csum_offset";
-    print "\thdr->flags = 0;"
-    print "\thdr->csum_offset = hdr->csum_start = 0;"
+    print "\tif (skb->ip_summed == CHECKSUM_HW) {"
     print "#else"
-    need_endif_indent_brace = 1;
+    need_endif = 1;
+}
+
+/hdr->csum_start = skb->csum_start/ {
+    print "#ifdef COMPAT_csum_offset";
+    print "\t\thdr->csum_start = skb->h.raw - skb->data;";
+    print "\t\thdr->csum_offset = skb->csum;";
+    print "#else"
+    need_endif = 1;
 }
 
 /skb_transport_header/ {
-- 
1.5.5.1