From: Parav Pandit <parav@mellanox.com>
Date: Tue, 14 Nov 2017 14:52:14 +0200
Subject: IB/cm: Handle address handle attribute init error
Patch-mainline: v4.16-rc1
Git-commit: 5cf3968afcc752fa2db6910e9694120b3373c73b
References: bsc#1103992 FATE#326009

cm_init_av_by_path depends on ib_init_ah_from_path to initialize ah
attribute and ib_init_ah_from_path() can fail, such error should not
be ignored.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/core/cm.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -494,8 +494,11 @@ static int cm_init_av_by_path(struct sa_
 		return ret;
 
 	av->port = port;
-	ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path,
-			     &av->ah_attr);
+	ret = ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path,
+				   &av->ah_attr);
+	if (ret)
+		return ret;
+
 	av->timeout = path->packet_life_time + 1;
 
 	spin_lock_irqsave(&cm.lock, flags);