*/
void device_bind_driver(struct device * dev)
{
+ if (klist_node_attached(&dev->knode_driver))
+ return;
+
pr_debug("bound device '%s' to driver '%s'\n",
dev->bus_id, dev->driver->name);
- klist_add_tail(&dev->driver->klist_devices, &dev->knode_driver);
+ klist_add_tail(&dev->knode_driver, &dev->driver->klist_devices);
sysfs_create_link(&dev->driver->kobj, &dev->kobj,
kobject_name(&dev->kobj));
sysfs_create_link(&dev->kobj, &dev->driver->kobj, "driver");
* because we don't know the format of the ID structures, nor what
* is to be considered a match and what is not.
*
- *
* This function returns 1 if a match is found, an error if one
* occurs (that is not -ENODEV or -ENXIO), and 0 otherwise.
*
- * This function must be called with @dev->sem held.
+ * This function must be called with @dev->sem held. When called
+ * for a USB interface, @dev->parent->sem must be held as well.
*/
int driver_probe_device(struct device_driver * drv, struct device * dev)
{
pr_debug("%s: Matched Device %s with Driver %s\n",
drv->bus->name, dev->bus_id, drv->name);
dev->driver = drv;
- if (drv->probe) {
+ if (dev->bus->probe) {
+ ret = dev->bus->probe(dev);
+ if (ret) {
+ dev->driver = NULL;
+ goto ProbeFailed;
+ }
+ } else if (drv->probe) {
ret = drv->probe(dev);
if (ret) {
dev->driver = NULL;
*
* Returns 1 if the device was bound to a driver;
* 0 if no matching device was found; error code otherwise.
+ *
+ * When called for a USB interface, @dev->parent->sem must be held.
*/
int device_attach(struct device * dev)
{
* is an error.
*/
+ if (dev->parent) /* Needed for USB */
+ down(&dev->parent->sem);
down(&dev->sem);
if (!dev->driver)
driver_probe_device(drv, dev);
up(&dev->sem);
-
+ if (dev->parent)
+ up(&dev->parent->sem);
return 0;
}
* Manually detach device from driver.
*
* __device_release_driver() must be called with @dev->sem held.
+ * When called for a USB interface, @dev->parent->sem must be held
+ * as well.
*/
static void __device_release_driver(struct device * dev)
sysfs_remove_link(&dev->kobj, "driver");
klist_remove(&dev->knode_driver);
- if (drv->remove)
+ if (dev->bus && dev->bus->remove)
+ dev->bus->remove(dev);
+ else if (drv->remove)
drv->remove(dev);
dev->driver = NULL;
put_driver(drv);
struct device * dev;
for (;;) {
- spin_lock_irq(&drv->klist_devices.k_lock);
+ spin_lock(&drv->klist_devices.k_lock);
if (list_empty(&drv->klist_devices.k_list)) {
- spin_unlock_irq(&drv->klist_devices.k_lock);
+ spin_unlock(&drv->klist_devices.k_lock);
break;
}
dev = list_entry(drv->klist_devices.k_list.prev,
struct device, knode_driver.n_node);
get_device(dev);
- spin_unlock_irq(&drv->klist_devices.k_lock);
+ spin_unlock(&drv->klist_devices.k_lock);
+ if (dev->parent) /* Needed for USB */
+ down(&dev->parent->sem);
down(&dev->sem);
if (dev->driver == drv)
__device_release_driver(dev);
up(&dev->sem);
+ if (dev->parent)
+ up(&dev->parent->sem);
put_device(dev);
}
}