[ofa-general] [PATCH 3/4] RDMA/nes: increase rexmit timeout interval

[Faisal Latif]

Under heavy cluster testing, it may takes longer to receive response to MPA
request. Changing it to wait longer after each rexmit to max time value.

Signed-off-by: Faisal Latif <faisal.latif at intel.com>
---
 drivers/infiniband/hw/nes/nes_cm.c |    6 +++++-
 drivers/infiniband/hw/nes/nes_cm.h |    1 +
 2 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index 851d62d..bcfd3c6 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -541,6 +541,7 @@ static void nes_cm_timer_tick(unsigned long pass)
 	struct list_head *list_node;
 	struct nes_cm_core *cm_core = g_cm_core;
 	u32 settimer = 0;
+	unsigned long timetosend;
 	int ret = NETDEV_TX_OK;
 
 	struct list_head timer_list;
@@ -645,8 +646,11 @@ static void nes_cm_timer_tick(unsigned long pass)
 				send_entry->retrycount);
 			if (send_entry->send_retrans) {
 				send_entry->retranscount--;
+				timetosend = (NES_RETRY_TIMEOUT <<
+					(NES_DEFAULT_RETRANS - send_entry->retranscount));
+
 				send_entry->timetosend = jiffies +
-					NES_RETRY_TIMEOUT;
+					min(timetosend, NES_MAX_TIMEOUT);
 				if (nexttimeout > send_entry->timetosend ||
 					!settimer) {
 					nexttimeout = send_entry->timetosend;
diff --git a/drivers/infiniband/hw/nes/nes_cm.h b/drivers/infiniband/hw/nes/nes_cm.h
index 80bba18..8b7e7c0 100644
--- a/drivers/infiniband/hw/nes/nes_cm.h
+++ b/drivers/infiniband/hw/nes/nes_cm.h
@@ -149,6 +149,7 @@ struct nes_timer_entry {
 #endif
 #define NES_SHORT_TIME      (10)
 #define NES_LONG_TIME       (2000*HZ/1000)
+#define NES_MAX_TIMEOUT     ((unsigned long) (12*HZ))
 
 #define NES_CM_HASHTABLE_SIZE         1024
 #define NES_CM_TCP_TIMER_INTERVAL     3000
-- 
1.5.3.3