Author: gallatin
Date: Thu Feb 21 17:00:35 2013
New Revision: 247104
URL: http://svnweb.freebsd.org/changeset/base/247104
Log:
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.
Sponsored by: Myricom Inc.
MFC after: 7 days
Modified:
head/sys/netinet/tcp_lro.c
Modified: head/sys/netinet/tcp_lro.c
==============================================================================
--- head/sys/netinet/tcp_lro.c Thu Feb 21 16:59:28 2013 (r247103)
+++ head/sys/netinet/tcp_lro.c Thu Feb 21 17:00:35 2013 (r247104)
@@ -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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