This message indicates an error returned from the host when changing MAC 
address.

Reported-by: Michal Kubecek <mkube...@suse.com>
Signed-off-by: Haiyang Zhang <haiya...@microsoft.com>
Reviewed-by: K. Y. Srinivasan <k...@microsoft.com>

---
 drivers/net/hyperv/rndis_filter.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/net/hyperv/rndis_filter.c 
b/drivers/net/hyperv/rndis_filter.c
index 7fdeb52..2b657d4 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -605,8 +605,11 @@ int rndis_filter_set_device_mac(struct hv_device *hdev, 
char *mac)
                return -EBUSY;
        } else {
                set_complete = &request->response_msg.msg.set_complete;
-               if (set_complete->status != RNDIS_STATUS_SUCCESS)
+               if (set_complete->status != RNDIS_STATUS_SUCCESS) {
+                       netdev_err(ndev, "Fail to set MAC on host side:0x%x\n",
+                                  set_complete->status);
                        ret = -EINVAL;
+               }
        }
 
 cleanup:
-- 
1.7.4.1

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