diff options
Diffstat (limited to 'drivers/s390/block/dasd_alias.c')
| -rw-r--r-- | drivers/s390/block/dasd_alias.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c index c388eda1e2b1..553b3c5abb0a 100644 --- a/drivers/s390/block/dasd_alias.c +++ b/drivers/s390/block/dasd_alias.c @@ -705,6 +705,16 @@ struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *base_device) if (lcu->pav == NO_PAV || lcu->flags & (NEED_UAC_UPDATE | UPDATE_PENDING)) return NULL; + if (unlikely(!(private->features.feature[8] & 0x01))) { + /* + * PAV enabled but prefix not, very unlikely + * seems to be a lost pathgroup + * use base device to do IO + */ + DBF_DEV_EVENT(DBF_ERR, base_device, "%s", + "Prefix not enabled with PAV enabled\n"); + return NULL; + } spin_lock_irqsave(&lcu->lock, flags); alias_device = group->next; |