s390/dasd: fix kernel panic when alias is set offline

[cascardo/linux.git] / drivers / s390 / block / dasd_alias.c

diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c
index a2597e6..ee3a6fa 100644 (file)
--- a/drivers/s390/block/dasd_alias.c
+++ b/drivers/s390/block/dasd_alias.c
@@ -699,7 +699,8 @@ struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *base_device)
                                               struct dasd_device, alias_list);
        spin_unlock_irqrestore(&lcu->lock, flags);
        alias_priv = (struct dasd_eckd_private *) alias_device->private;
-       if ((alias_priv->count < private->count) && !alias_device->stopped)
+       if ((alias_priv->count < private->count) && !alias_device->stopped &&
+           !test_bit(DASD_FLAG_OFFLINE, &alias_device->flags))
                return alias_device;
        else
                return NULL;