enable virtio_net to return bus_info in ethtool -i consistent with emulated NICs

Add a new .bus_name to virtio_config_ops then modify virtio_net to
call through to it in an ethtool .get_drvinfo routine to report
bus_info in ethtool -i output which is consistent with other
emulated NICs and the output of lspci.

Signed-off-by: Rick Jones <rick.jones2@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 0dc30ffde5ad..595d73197016 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -381,6 +381,11 @@ error:
         return PTR_ERR(vqs[i]);
 }
 
+static const char *lg_bus_name(struct virtio_device *vdev)
+{
+        return "";
+}
+
 /* The ops structure which hooks everything together. */
 static struct virtio_config_ops lguest_config_ops = {
         .get_features = lg_get_features,
@@ -392,6 +397,7 @@ static struct virtio_config_ops lguest_config_ops = {
         .reset = lg_reset,
         .find_vqs = lg_find_vqs,
         .del_vqs = lg_del_vqs,
+        .bus_name = lg_bus_name,
 };
 
 /*