Re: [PATCH] Driver core changes for 2.5.69

[Greg KH <greg@kroah.com>]

ChangeSet 1.1097, 2003/05/09 16:26:28-07:00, greg@kroah.com

[PATCH] driver core: Add driver symlink to class devices in sysfs.

Thanks to Mike Anderson for the idea for this.


 drivers/base/class.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+)


diff -Nru a/drivers/base/class.c b/drivers/base/class.c
--- a/drivers/base/class.c	Fri May  9 16:40:29 2003
+++ b/drivers/base/class.c	Fri May  9 16:40:29 2003
@@ -133,6 +133,21 @@
 		sysfs_remove_link(&class_dev->kobj, "device");
 }
 
+static int class_device_driver_link(struct class_device * class_dev)
+{
+	if ((class_dev->dev) && (class_dev->dev->driver))
+		return sysfs_create_link(&class_dev->kobj,
+					 &class_dev->dev->driver->kobj, "driver");
+	return 0;
+}
+
+static void class_device_driver_unlink(struct class_device * class_dev)
+{
+	if ((class_dev->dev) && (class_dev->dev->driver))
+		sysfs_remove_link(&class_dev->kobj, "driver");
+}
+
+
 #define to_class_dev(obj) container_of(obj,struct class_device,kobj)
 #define to_class_dev_attr(_attr) container_of(_attr,struct class_device_attribute,attr)
 
@@ -265,6 +280,7 @@
 	}
 
 	class_device_dev_link(class_dev);
+	class_device_driver_link(class_dev);
 
  register_done:
 	if (error && parent)
@@ -298,6 +314,7 @@
 
 	if (class_dev->dev) {
 		class_device_dev_unlink(class_dev);
+		class_device_driver_unlink(class_dev);
 		put_device(class_dev->dev);
 	}