[ofa-general] RDMA/nes: FIN state handling under error conditions

[Faisal Latif]

 During cluster testing, one qp is not closed as FIN is not handled
 properly when its rexmit count expires or in some cases when RST is
 is received after sending FIN. The reason is that cm_id does not get
 decremented under these conditions.

Signed-off-by: Faisal Latif <faisal.latif at intel.com>
---
 drivers/infiniband/hw/nes/nes_cm.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index 11c7d66..114b802 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -472,6 +472,7 @@ int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
 
 static void nes_retrans_expired(struct nes_cm_node *cm_node)
 {
+	struct iw_cm_id *cm_id = cm_node->cm_id;
 	switch (cm_node->state) {
 	case NES_CM_STATE_SYN_RCVD:
 	case NES_CM_STATE_CLOSING:
@@ -479,7 +480,9 @@ static void nes_retrans_expired(struct nes_cm_node *cm_node)
 		break;
 	case NES_CM_STATE_LAST_ACK:
 	case NES_CM_STATE_FIN_WAIT1:
-	case NES_CM_STATE_MPAREJ_RCVD:
+		if (cm_node->cm_id)
+			cm_id->rem_ref(cm_id);
+		cm_node->state = NES_CM_STATE_CLOSED;
 		send_reset(cm_node, NULL);
 		break;
 	default:
@@ -1406,6 +1409,7 @@ static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
 	case NES_CM_STATE_CLOSED:
 		drop_packet(skb);
 		break;
+	case NES_CM_STATE_FIN_WAIT1:
 	case NES_CM_STATE_LAST_ACK:
 		cm_node->cm_id->rem_ref(cm_node->cm_id);
 	case NES_CM_STATE_TIME_WAIT:
@@ -1413,8 +1417,6 @@ static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
 		rem_ref_cm_node(cm_node->cm_core, cm_node);
 		drop_packet(skb);
 		break;
-	case NES_CM_STATE_FIN_WAIT1:
-		nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
 	default:
 		drop_packet(skb);
 		break;
-- 
1.5.3.3