1 files changed, 11 insertions, 2 deletions

diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c
index 62f5f04d8f61..5e963fe0e38d 100644
--- a/drivers/s390/block/dasd_alias.c
+++ b/drivers/s390/block/dasd_alias.c
@@ -592,13 +592,22 @@ static int _schedule_lcu_update(struct alias_lcu *lcu,
 int dasd_alias_add_device(struct dasd_device *device)
 {
         struct dasd_eckd_private *private = device->private;
-        struct alias_lcu *lcu;
+        __u8 uaddr = private->uid.real_unit_addr;
+        struct alias_lcu *lcu = private->lcu;
         unsigned long flags;
         int rc;
 
-        lcu = private->lcu;
         rc = 0;
         spin_lock_irqsave(&lcu->lock, flags);
+        /*
+         * Check if device and lcu type differ. If so, the uac data may be
+         * outdated and needs to be updated.
+         */
+        if (private->uid.type !=  lcu->uac->unit[uaddr].ua_type) {
+                lcu->flags |= UPDATE_PENDING;
+                DBF_DEV_EVENT(DBF_WARNING, device, "%s",
+                              "uid type mismatch - trigger rescan");
+        }
         if (!(lcu->flags & UPDATE_PENDING)) {
                 rc = _add_device_to_lcu(lcu, device, device);
                 if (rc)