drivers: base: omit redundant interations

When error happens, these interators return the error, no interation should
be continued, so make the change for getting out of while immediately.
Signed-off-by: Gimcuan Hui <gimcuan@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/bus.c

@@ -307,7 +307,7 @@ int bus_for_each_dev(struct bus_type *bus, struct device *start,
 
 	klist_iter_init_node(&bus->p->klist_devices, &i,
 			     (start ? &start->p->knode_bus : NULL));
-	while ((dev = next_device(&i)) && !error)
+	while (!error && (dev = next_device(&i)))
 		error = fn(dev, data);
 	klist_iter_exit(&i);
 	return error;

drivers/base/core.c

@@ -2114,7 +2114,7 @@ int device_for_each_child(struct device *parent, void *data,
 		return 0;
 
 	klist_iter_init(&parent->p->klist_children, &i);
-	while ((child = next_device(&i)) && !error)
+	while (!error && (child = next_device(&i)))
 		error = fn(child, data);
 	klist_iter_exit(&i);
 	return error;

drivers/base/driver.c

@@ -50,7 +50,7 @@ int driver_for_each_device(struct device_driver *drv, struct device *start,
 
 	klist_iter_init_node(&drv->p->klist_devices, &i,
 			     start ? &start->p->knode_driver : NULL);
-	while ((dev = next_device(&i)) && !error)
+	while (!error && (dev = next_device(&i)))
 		error = fn(dev, data);
 	klist_iter_exit(&i);
 	return error;