igb: Warn on attempt to override administratively set MAC/VLAN

Print a warning message to the system log when the VF attempts to
override administratively set MAC/VLAN configuration.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 14 insertions, 3 deletions

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index be426a4a7240..c9aac7f15cd2 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -5105,7 +5105,14 @@ static void igb_rcv_msg_from_vf(struct igb_adapter *adapter, u32 vf)
 
         switch ((msgbuf[0] & 0xFFFF)) {
         case E1000_VF_SET_MAC_ADDR:
-                retval = igb_set_vf_mac_addr(adapter, msgbuf, vf);
+                retval = -EINVAL;
+                if (!(vf_data->flags & IGB_VF_FLAG_PF_SET_MAC))
+                        retval = igb_set_vf_mac_addr(adapter, msgbuf, vf);
+                else
+                        dev_warn(&pdev->dev,
+                                 "VF %d attempted to override administratively "
+                                 "set MAC address\nReload the VF driver to "
+                                 "resume operations\n", vf);
                 break;
         case E1000_VF_SET_PROMISC:
                 retval = igb_set_vf_promisc(adapter, msgbuf, vf);
@@ -5117,8 +5124,12 @@ static void igb_rcv_msg_from_vf(struct igb_adapter *adapter, u32 vf)
                 retval = igb_set_vf_rlpml(adapter, msgbuf[1], vf);
                 break;
         case E1000_VF_SET_VLAN:
-                if (adapter->vf_data[vf].pf_vlan)
-                        retval = -1;
+                retval = -1;
+                if (vf_data->pf_vlan)
+                        dev_warn(&pdev->dev,
+                                 "VF %d attempted to override administratively "
+                                 "set VLAN tag\nReload the VF driver to "
+                                 "resume operations\n", vf);
                 else
                         retval = igb_set_vf_vlan(adapter, msgbuf, vf);
                 break;