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Commit 2287c322 authored by Patrick Mochel's avatar Patrick Mochel Committed by Greg Kroah-Hartman
Browse files

[PATCH] Use bus_for_each_{dev,drv} for driver binding. 



- Now possible, since the lists are locked using the klist lock and not the
  global rwsem.

Signed-off-by: default avatarPatrick Mochel <mochel@digitalimplant.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent cb85b6f1

drivers/base/dd.c

+39 −33
Original line number Diff line number Diff line
@@ -82,6 +82,28 @@ int driver_probe_device(struct device_driver * drv, struct device * dev) 
	return 0;

}



static int __device_attach(struct device_driver * drv, void * data)

{

	struct device * dev = data;

	int error;



	error = driver_probe_device(drv, dev);



	if (error == -ENODEV && error == -ENXIO) {

		/* Driver matched, but didn't support device

		 * or device not found.

		 * Not an error; keep going.

		 */

		error = 0;

	} else {

		/* driver matched but the probe failed */

		printk(KERN_WARNING

		       "%s: probe of %s failed with error %d\n",

		       drv->name, dev->bus_id, error);

	}

	return 0;

}



/**

 *	device_attach - try to attach device to a driver.

 *	@dev:	device.
@@ -92,30 +114,31 @@ int driver_probe_device(struct device_driver * drv, struct device * dev) 
 */

int device_attach(struct device * dev)

{

 	struct bus_type * bus = dev->bus;

	struct list_head * entry;

	int error;



	if (dev->driver) {

		device_bind_driver(dev);

		return 1;

	}



	if (bus->match) {

		list_for_each(entry, &bus->drivers.list) {

			struct device_driver * drv = to_drv(entry);

	return bus_for_each_drv(dev->bus, NULL, dev, __device_attach);

}



static int __driver_attach(struct device * dev, void * data)

{

	struct device_driver * drv = data;

	int error = 0;



	if (!dev->driver) {

		error = driver_probe_device(drv, dev);

			if (!error)

				/* success, driver matched */

				return 1;

			if (error != -ENODEV && error != -ENXIO)

		if (error) {

			if (error != -ENODEV) {

				/* driver matched but the probe failed */

				printk(KERN_WARNING

				       "%s: probe of %s failed with error %d\n",

				       drv->name, dev->bus_id, error);

			} else

				error = 0;

		}

	}



	return 0;

}
@@ -133,24 +156,7 @@ int device_attach(struct device * dev) 
 */

void driver_attach(struct device_driver * drv)

{

	struct bus_type * bus = drv->bus;

	struct list_head * entry;

	int error;



	if (!bus->match)

		return;



	list_for_each(entry, &bus->devices.list) {

		struct device * dev = container_of(entry, struct device, bus_list);

		if (!dev->driver) {

			error = driver_probe_device(drv, dev);

			if (error && (error != -ENODEV))

				/* driver matched but the probe failed */

				printk(KERN_WARNING

				    "%s: probe of %s failed with error %d\n",

				    drv->name, dev->bus_id, error);

		}

	}

	bus_for_each_dev(drv->bus, NULL, drv, __driver_attach);

}



/**