diff options
Diffstat (limited to 'drivers/s390/cio/chsc.c')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 5df0efee54db..13747c510c0b 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -1003,6 +1003,12 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp) u32 data[NR_MEASUREMENT_CHARS]; } __attribute__ ((packed)) *scmc_area; + chp->shared = -1; + chp->cmg = -1; + + if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm) + return 0; + spin_lock_irq(&chsc_page_lock); memset(chsc_page, 0, PAGE_SIZE); scmc_area = chsc_page; @@ -1023,11 +1029,9 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp) scmc_area->response.code); goto out; } - if (scmc_area->not_valid) { - chp->cmg = -1; - chp->shared = -1; + if (scmc_area->not_valid) goto out; - } + chp->cmg = scmc_area->cmg; chp->shared = scmc_area->shared; if (chp->cmg != 2 && chp->cmg != 3) { |