From: Dmitry Torokhov <dtor_core@ameritech.net>
To: LKML <linux-kernel@vger.kernel.org>
Subject: Driver core change request
Date: Wed, 6 Oct 2004 23:54:18 -0500
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Cc: Greg KH <greg@kroah.com>, Patrick Mochel <mochel@osdl.org>
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Hi,

I am reworking my sysfs serio patches (trying to get dynamic psmouse
protocol switching) and I am wondering if we could export device_attach
function. Serio system allows user to request device rescan - force current
driver to let go off the device and find another suitable driver. Also user
can manually request device to be disconnected/connected to a driver. By
having device_attach exported I could get rid of some duplicated code.

Also serio allows user to request a specific driver to be bound to a device
in case there are several options (psmouse/serio_raw for example). To do
that and not poke in the driver core guts too much I need something like the
following:

int driver_probe_device(struct device_driver *dev, struct device *dev)
{
        int error;
        
	dev->driver = drv;
        if (drv->probe) {
        	if ((error = drv->probe(dev))) {
                	dev->driver = NULL;
                        return error;
                }
	}
        device_bind_driver(dev);
        return 0;
}


static int bus_match(struct device * dev, struct device_driver * drv)
{
        if (dev->bus->match(dev, drv))
		return driver_probe_device(drv, dev);

        return -ENODEV;
}

I.e driver_probe_device is exported. Does it have a chance to be accepted?

Thanks!

-- 
Dmitry
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