Author: gallatin
Date: Thu Feb 28 16:32:36 2013
New Revision: 247470
URL: http://svnweb.freebsd.org/changeset/base/247470
Log:
  MFC r247104:
    Fix tcp_lro_rx_ipv4() for drivers that do not set CSUM_IP_CHECKED.
    Specifcially, in_cksum_hdr() returns 0 (not 0xffff) when the IPv4
    checksum is correct. Without this fix, the tcp_lro code will reject
    good IPv4 traffic from drivers that do not implement IPv4 header
    harder csum offload.

Modified:
  stable/9/sys/netinet/tcp_lro.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/netinet/tcp_lro.c
==============================================================================
--- stable/9/sys/netinet/tcp_lro.c      Thu Feb 28 16:32:25 2013        
(r247469)
+++ stable/9/sys/netinet/tcp_lro.c      Thu Feb 28 16:32:36 2013        
(r247470)
@@ -333,7 +333,7 @@ tcp_lro_rx_ipv4(struct lro_ctrl *lc, str
                }
        } else {
                csum = in_cksum_hdr(ip4);
-               if (__predict_false((csum ^ 0xffff) != 0)) {
+               if (__predict_false((csum) != 0)) {
                        lc->lro_bad_csum++;
                        return (TCP_LRO_CANNOT);
                }
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