4ccd7dfa2c
leave a port permanently disabled when a copper cable is unplugged and then plugged right back in. lacp_linkstate goes looking for the current ifmedia on a link state change and it could get stale information from cxgbe(4) on a module unplug followed by replug. The fix is to process module events before link-state events within the driver, and to always rebuild the ifmedia list on a module change event (instead of rebuilding it lazily). Thanks to asomers@ for the problem report and detailed analysis to go with it. MFC after: 1 week