From 1660a26adbb3aab6af0bb067e15a831f926c163a Mon Sep 17 00:00:00 2001 From: Tatyana Nikolova Date: Tue, 3 Oct 2017 11:11:46 -0500 Subject: [PATCH] i40iw: Do not retransmit MPA request after it is ACKed The ACK packets for an MPA request are ignored and the MPA request is retransmitted if the MPA reply is late or missing. Fix this by checking ack_rcvd variable before retransmitting a packet. Fixes: f27b4746f378 ("i40iw: add connection management code") Signed-off-by: Tatyana Nikolova Signed-off-by: Faisal Latif Signed-off-by: Shiraz Saleem Signed-off-by: Doug Ledford --- drivers/infiniband/hw/i40iw/i40iw_cm.c | 13 ++++++++++--- drivers/infiniband/hw/i40iw/i40iw_cm.h | 1 + 2 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c index 9017c1cc51d4..50c43766defd 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_cm.c +++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c @@ -1267,13 +1267,16 @@ static void i40iw_cm_timer_tick(unsigned long pass) spin_lock_irqsave(&cm_node->retrans_list_lock, flags); goto done; } - cm_node->cm_core->stats_pkt_retrans++; spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); vsi = &cm_node->iwdev->vsi; dev = cm_node->dev; - atomic_inc(&send_entry->sqbuf->refcount); - i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf); + + if (!cm_node->ack_rcvd) { + atomic_inc(&send_entry->sqbuf->refcount); + i40iw_puda_send_buf(vsi->ilq, send_entry->sqbuf); + cm_node->cm_core->stats_pkt_retrans++; + } spin_lock_irqsave(&cm_node->retrans_list_lock, flags); if (send_entry->send_retrans) { send_entry->retranscount--; @@ -2181,6 +2184,7 @@ static struct i40iw_cm_node *i40iw_make_cm_node( cm_node->cm_id = cm_info->cm_id; ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); spin_lock_init(&cm_node->retrans_list_lock); + cm_node->ack_rcvd = false; atomic_set(&cm_node->ref_count, 1); /* associate our parent CM core */ @@ -2719,7 +2723,10 @@ static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node, cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); if (datasize) { cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; + cm_node->ack_rcvd = false; i40iw_handle_rcv_mpa(cm_node, rbuf); + } else { + cm_node->ack_rcvd = true; } break; case I40IW_CM_STATE_LISTENING: diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.h b/drivers/infiniband/hw/i40iw/i40iw_cm.h index 45abef76295b..0d5840d2c4fc 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_cm.h +++ b/drivers/infiniband/hw/i40iw/i40iw_cm.h @@ -360,6 +360,7 @@ struct i40iw_cm_node { u8 pdata_buf[IETF_MAX_PRIV_DATA_LEN]; struct i40iw_kmem_info mpa_hdr; + bool ack_rcvd; }; /* structure for client or CM to fill when making CM api calls. */