driver core: add init_name to struct device

This gives us a way to handle both the bus_id and init_name values being
used for a while during the transition period.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 14 insertions, 7 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 40041319657d..d021c98605b3 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -844,13 +844,19 @@ int device_add(struct device *dev)
 {
         struct device *parent = NULL;
         struct class_interface *class_intf;
-        int error;
+        int error = -EINVAL;
 
         dev = get_device(dev);
-        if (!dev || !strlen(dev->bus_id)) {
-                error = -EINVAL;
-                goto Done;
-        }
+        if (!dev)
+                goto done;
+
+        /* Temporarily support init_name if it is set.
+         * It will override bus_id for now */
+        if (dev->init_name)
+                dev_set_name(dev, "%s", dev->init_name);
+
+        if (!strlen(dev->bus_id))
+                goto done;
 
         pr_debug("device: '%s': %s\n", dev->bus_id, __func__);
 
@@ -919,7 +925,7 @@ int device_add(struct device *dev)
                                 class_intf->add_dev(dev, class_intf);
                 mutex_unlock(&dev->class->p->class_mutex);
         }
- Done:
+done:
         put_device(dev);
         return error;
  DPMError:
@@ -946,7 +952,7 @@ int device_add(struct device *dev)
         cleanup_device_parent(dev);
         if (parent)
                 put_device(parent);
-        goto Done;
+        goto done;
 }
 
 /**
diff --git a/include/linux/device.h b/include/linux/device.h
index a701c1b5184c..4d8372d135df 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -358,6 +358,7 @@ struct device {
 
         struct kobject kobj;
         char    bus_id[BUS_ID_SIZE];    /* position on parent bus */
+        const char              *init_name; /* initial name of the device */
         struct device_type      *type;
         unsigned                uevent_suppress:1;