In some botched (!) restart scenarios we seem to get here with
a NULL PHY context, so warn and exit instead of crashing.
Reported-by: NOmer Kremer <omerx.kremer@intel.com>
Reviewed-by: NIlan Peer <ilan.peer@intel.com>
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>