From: Greg Kroah-Hartman <gregkh@suse.de>
Date: Fri, 30 May 2008 17:45:12 +0000 (-0700)
Subject: driver core: add init_name to struct device
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c906a48adc74fc455378137ac5124b13e7030a15;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

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>
---

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;