qeth: clean up error handling
In the functions that are registering and unregistering MAC addresses in the qeth-handled hardware, remove callback functions that are unnesessary, as only the return code is analyzed. Translate hardware response codes to semi-standard 'errno'-like codes for readability. Add kernel-doc description to the internal API function qeth_send_control_data(). Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Reviewed-by: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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