+
+ if (class_dev->dev) {
+ /* add physical device, backing this device */
+ struct device *dev = class_dev->dev;
+ char *path = kobject_get_path(&dev->kobj, GFP_KERNEL);
+
+ add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size,
+ &length, "PHYSDEVPATH=%s", path);
+ kfree(path);
+
+ /* add bus name of physical device */
+ if (dev->bus)
+ add_hotplug_env_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "PHYSDEVBUS=%s", dev->bus->name);
+
+ /* add driver name of physical device */
+ if (dev->driver)
+ add_hotplug_env_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "PHYSDEVDRIVER=%s", dev->driver->name);
+
+ /* terminate, set to next free slot, shrink available space */
+ envp[i] = NULL;
+ envp = &envp[i];
+ num_envp -= i;
+ buffer = &buffer[length];
+ buffer_size -= length;
+ }
+