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Commit f2b2b59b authored by Chien Tung's avatar Chien Tung Committed by Roland Dreier
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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: default avatarChien Tung <ctung@neteffect.com>
Signed-off-by: default avatarGlenn Streiff <gstreiff@neteffect.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent dba92d3b

drivers/infiniband/hw/nes/nes_cm.c

+2 −1
Original line number Diff line number Diff line
@@ -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);