RDMA/usnic: Suppress a compiler warning

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>

diff --git a/drivers/infiniband/hw/usnic/usnic_fwd.c b/drivers/infiniband/hw/usnic/usnic_fwd.c
index 995a26b..7875883 100644 (file)
--- 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_alloc(struct pci_dev *pdev)
        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;
 }

diff --git a/drivers/infiniband/hw/usnic/usnic_fwd.h b/drivers/infiniband/hw/usnic/usnic_fwd.h
index 0b2cc4e..f0b71d5 100644 (file)
--- 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 {