i40evf: ignore bogus messages from FW

Occasionally on shutdown, the FW will hand us a bunch of messages filled
with zeros, which can cause us to spin trying to handle them. Just
ignore these and get on with shutting down.

Change-ID: I347e9648f7153ad5a7b7e0847b87f7aad5f3e0da
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index cd71c47732b2377727878df9469856c8564fc777..38126f5d6fd9ba3c1f31a3b33947245f5dd07ed5 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -1631,7 +1631,7 @@ static void i40evf_adminq_task(struct work_struct *work)
        v_msg = (struct i40e_virtchnl_msg *)&event.desc;
        do {
                ret = i40evf_clean_arq_element(hw, &event, &pending);
-               if (ret)
+               if (ret || !v_msg->v_opcode)
                        break; /* No event to process or error cleaning ARQ */
 
                i40evf_virtchnl_completion(adapter, v_msg->v_opcode,