Supress command completion failure warning when the card isn't present.  Only call the bus to check if we actually do timeout so we don't affect the normal case (since this case needn't be optimized and this guards against all races).
Supress command completion failure warning when the card isn't
present.  Only call the bus to check if we actually do timeout so we
don't affect the normal case (since this case needn't be optimized and
this guards against all races).

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase