qeth.21a074 <bus ID of the qeth device>: There is no kernel module to support discipline <discipline>
Explanation
The qeth device driver or a user command requested a kernel module for a
particular qeth discipline. Either the discipline is not supported by the
qeth device driver or the requested module is not available to your Linux
system.
User response
Check if the requested discipline module has been compiled into the kernel
or is present in /lib/modules/<version>/kernel/drivers/s390/net.