ixgbe: avoid doing FCoE DDP when adapter is DOWN or RESETTING

There is no point to allow incoming DDP requests from the upper layer stack if
the adapter is going down or being reset.
Signed-off-by: Yi Zou <yi.zou@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ixgbe/ixgbe_fcoe.c

@@ -168,6 +168,11 @@ int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
 		return 0;
 	}
 
+	/* no DDP if we are already down or resetting */
+	if (test_bit(__IXGBE_DOWN, &adapter->state) ||
+	    test_bit(__IXGBE_RESETTING, &adapter->state))
+		return 0;
+
 	fcoe = &adapter->fcoe;
 	if (!fcoe->pool) {
 		e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid);