diff options
| -rw-r--r-- | drivers/s390/cio/chp.c | 11 | ||||
| -rw-r--r-- | drivers/s390/cio/chsc.c | 2 |
2 files changed, 8 insertions, 5 deletions
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c index 50597f9522fe..d3b72eab2b8f 100644 --- a/drivers/s390/cio/chp.c +++ b/drivers/s390/cio/chp.c @@ -428,11 +428,14 @@ int chp_update_desc(struct channel_path *chp) if (rc) return rc; - rc = chsc_determine_fmt1_channel_path_desc(chp->chpid, &chp->desc_fmt1); - if (rc) - return rc; + /* + * Fetching the following data is optional. Not all machines or + * hypervisors implement the required chsc commands. + */ + chsc_determine_fmt1_channel_path_desc(chp->chpid, &chp->desc_fmt1); + chsc_get_channel_measurement_chars(chp); - return chsc_get_channel_measurement_chars(chp); + return 0; } /** diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 452193f7298c..39bb2ea7b78f 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -1020,7 +1020,7 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp) chp->cmg = -1; if (!css_chsc_characteristics.scmc || !css_chsc_characteristics.secm) - return 0; + return -EINVAL; spin_lock_irq(&chsc_page_lock); memset(chsc_page, 0, PAGE_SIZE); |