found by code inspection: swapped arguments in memset calls..
drivers/s390/cio/cmf.c: memset(data, sizeof(struct cmbdata), 0);
drivers/s390/cio/cmf.c: memset (data, sizeof(struct cmbdata), 0);
drivers/s390/cio/css.c: memset(new_slow_sch, sizeof(struct slow_subchannel), 0);
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.