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i40iw: Do not retransmit MPA request after it is ACKed

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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: f27b4746f3 ("i40iw: add connection management code")
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Tatyana Nikolova 2017-10-03 11:11:46 -05:00 committed by Doug Ledford
parent 63ea641f49
commit 1660a26adb
2 changed files with 11 additions and 3 deletions
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13
drivers/infiniband/hw/i40iw/i40iw_cm.c
View File

@ -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:

1
drivers/infiniband/hw/i40iw/i40iw_cm.h
View File

@ -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. */