Driver core: remove unneeded completion from driver release path

The completion in the driver release path is due to ancient history in
the _very_ early 2.5 days when we were not tracking the module reference
count of attributes.  It is not needed at all and can be removed.

Note, we now have an empty release function for the driver structure.
This is due to the fact that drivers are statically allocated in the
system at this point in time, something which I want to change in the
future.  But remember, drivers are really code, which is reference
counted by the module, unlike devices, which are data and _must_ be
reference counted properly in order to work correctly.


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

1 files changed, 13 insertions, 2 deletions

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 20b6dc8706fa..1a5a350eca15 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -63,8 +63,19 @@ static struct sysfs_ops driver_sysfs_ops = {
 
 static void driver_release(struct kobject * kobj)
 {
-        struct device_driver * drv = to_driver(kobj);
-        complete(&drv->unloaded);
+        /*
+         * Yes this is an empty release function, it is this way because struct
+         * device is always a static object, not a dynamic one.  Yes, this is
+         * not nice and bad, but remember, drivers are code, reference counted
+         * by the module count, not a device, which is really data.  And yes,
+         * in the future I do want to have all drivers be created dynamically,
+         * and am working toward that goal, but it will take a bit longer...
+         *
+         * But do not let this example give _anyone_ the idea that they can
+         * create a release function without any code in it at all, to do that
+         * is almost always wrong.  If you have any questions about this,
+         * please send an email to <greg@kroah.com>
+         */
 }
 
 static struct kobj_type ktype_driver = {