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RDMA/nes: Fix MSS calculation on RDMA path 

Fix the calculation of the MSS for RDMA connections: we need to
allow space in frames for a VLAN tag too.

Signed-off-by: Chien Tung <ctung@neteffect.com>
Signed-off-by: Glenn Streiff <gstreiff@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Chien Tung 2008-03-20 19:55:30 -05:00 committed by Roland Dreier
parent dba92d3bc4
commit f2b2b59b93
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/hw/nes/nes_cm.c
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@ -40,6 +40,7 @@
#include <linux/tcp.h>
#include <linux/init.h>
#include <linux/if_arp.h>
#include <linux/if_vlan.h>
#include <linux/notifier.h>
#include <linux/net.h>
#include <linux/types.h>
@ -1072,7 +1073,7 @@ static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
ts = current_kernel_time();
cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
sizeof(struct tcphdr) - ETH_HLEN;
sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
cm_node->tcp_cntxt.rcv_nxt = 0;
/* get a unique session ID , add thread_id to an upcounter to handle race */
atomic_inc(&cm_core->node_cnt);