Commit 190888ac authored Nov 19, 2012 by Ming Lei Committed by Greg Kroah-Hartman Jan 17, 2013

driver core: fix possible missing of device probe



Inside bus_add_driver(), one device might be added(device_add()) into
the bus or probed which is triggered by deferred probe
just after completing of driver_attach() and before
'klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers)',
so the device won't be probed by this driver.

This patch moves the below line

	'klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers)'

before driver_attach() inside bus_add_driver() to fix the
problem.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 1884bd4b

drivers/base/bus.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -700,12 +700,12 @@ int bus_add_driver(struct device_driver *drv)
		if (error)
		goto out_unregister;

		klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers);
		if (drv->bus->p->drivers_autoprobe) {
		error = driver_attach(drv);
		if (error)
		goto out_unregister;
		}
		klist_add_tail(&priv->knode_bus, &bus->p->klist_drivers);
		module_add_driver(drv->owner, drv);

		error = driver_create_file(drv, &driver_attr_uevent);