From: Jan Sokolowski <jan.sokolowski@intel.com>
Date: Tue, 14 Nov 2017 04:34:45 -0800
Subject: IB/hfi1: Use 4096 for default active MTU in query_qp
Patch-mainline: v4.16-rc1
Git-commit: 69a3ffaa0a43d1c5a34b6f52aa08a5fc3d8d87d4
References: bsc#1070622

Currently, if a port is queried that has an invalid
Maximum Transmission Unit, driver reports default MTU of 2048.
This in incorrect.

Use default value of 4096 if invalid.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hfi1/verbs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/hfi1/verbs.c
+++ b/drivers/infiniband/hw/hfi1/verbs.c
@@ -1472,7 +1472,7 @@ static int query_port(struct rvt_dev_inf
 	props->max_mtu = mtu_to_enum((!valid_ib_mtu(hfi1_max_mtu) ?
 				      4096 : hfi1_max_mtu), IB_MTU_4096);
 	props->active_mtu = !valid_ib_mtu(ppd->ibmtu) ? props->max_mtu :
-		mtu_to_enum(ppd->ibmtu, IB_MTU_2048);
+		mtu_to_enum(ppd->ibmtu, IB_MTU_4096);
 
 	/*
 	 * sm_lid of 0xFFFF needs special handling so that it can