From: Bart Van Assche <bart.vanassche@wdc.com>
Date: Mon, 23 Jul 2018 15:37:01 -0700
Subject: RDMA/usnic: Suppress a compiler warning
Patch-mainline: v4.19-rc1
Git-commit: 7cfcc71eb0e50f191983d714223c169c47437021
References: bsc#1103992 FATE#326009

This patch avoids that the following compiler warning is reported when
building with gcc 8 and W=1:

drivers/infiniband/hw/usnic/usnic_fwd.c:95:2: warning: 'strncpy' output may be truncated copying 16 bytes from a string of length 20 [-Wstringop-truncation]
  strncpy(ufdev->name, netdev_name(ufdev->netdev),
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    sizeof(ufdev->name) - 1);
    ~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/usnic/usnic_fwd.c |    4 ++--
 drivers/infiniband/hw/usnic/usnic_fwd.h |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/infiniband/hw/usnic/usnic_fwd.c
+++ b/drivers/infiniband/hw/usnic/usnic_fwd.c
@@ -92,8 +92,8 @@ struct usnic_fwd_dev *usnic_fwd_dev_allo
 	ufdev->pdev = pdev;
 	ufdev->netdev = pci_get_drvdata(pdev);
 	spin_lock_init(&ufdev->lock);
-	strncpy(ufdev->name, netdev_name(ufdev->netdev),
-			sizeof(ufdev->name) - 1);
+	BUILD_BUG_ON(sizeof(ufdev->name) != sizeof(ufdev->netdev->name));
+	strcpy(ufdev->name, ufdev->netdev->name);
 
 	return ufdev;
 }
--- a/drivers/infiniband/hw/usnic/usnic_fwd.h
+++ b/drivers/infiniband/hw/usnic/usnic_fwd.h
@@ -57,7 +57,7 @@ struct usnic_fwd_dev {
 	char				mac[ETH_ALEN];
 	unsigned int			mtu;
 	__be32				inaddr;
-	char				name[IFNAMSIZ+1];
+	char				name[IFNAMSIZ];
 };
 
 struct usnic_fwd_flow {