if (!dev->bulk_out_endpointAddr &&
usb_endpoint_is_bulk_out(endpoint)) {
/* we found a bulk out endpoint */
dev->bulk_out_endpointAddr = endpoint->bEndpointAddress;
}
}
if (!(dev->bulk_in_endpointAddr && dev->bulk_out_endpointAddr)) {
err("Could not find both bulk-in and bulk-out endpoints");
goto error;
}
/* save our data pointer in this interface device */
usb_set_intfdata(interface, dev);
/* we can register the device now, as it is ready */
retval = usb_register_dev(interface, &skel_class);
if (retval) {
/* something prevented us from registering this driver */
err("Not able to get a minor for this device.");
usb_set_intfdata(interface, NULL);
goto error;
}
/* let the user know what node this device is now attached to */
dev_info(&interface->dev,
"USB Skeleton device now attached to USBSkel-%d",
interface->minor);
return 0;
error:
if (dev)
/* this frees allocated memory */
kref_put(&dev->kref, skel_delete);
return retval;
}
static void skel_disconnect(struct usb_interface *interface)
{
struct usb_skel *dev;
int minor = interface->minor;
dev = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
/* give back our minor */
usb_deregister_dev(interface, &skel_class);
/* prevent more I/O from starting */
mutex_lock(&dev->io_mutex);
dev->interface = NULL;
mutex_unlock(&dev->io_mutex);
usb_kill_anchored_urbs(&dev->submitted);
/* decrement our usage count */
kref_put(&dev->kref, skel_delete);
dev_info(&interface->dev, "USB Skeleton #%d now disconnected", minor);
}
static void skel_draw_down(struct usb_skel *dev)
{
int time;
time = usb_wait_anchor_empty_timeout(&dev->submitted, 1000);
if (!time)
usb_kill_anchored_urbs(&dev->submitted);
usb_kill_urb(dev->bulk_in_urb);
}
static int skel_suspend(struct usb_interface *intf, pm_message_t message)
{
struct usb_skel *dev = usb_get_intfdata(intf);
if (!dev)
return 0;
skel_draw_down(dev);
return 0;
}
static int skel_resume(struct usb_interface *intf)
{
return 0;
}
static int skel_pre_reset(struct usb_interface *intf)
{
struct usb_skel *dev = usb_get_intfdata(intf);
mutex_lock(&dev->io_mutex);
skel_draw_down(dev);
return 0;
}
static int skel_post_reset(struct usb_interface *intf)
{
struct usb_skel *dev = usb_get_intfdata(intf);
/* we are sure no URBs are active - no locking needed */
dev->errors = -EPIPE;
mutex_unlock(&dev->io_mutex);
return 0;
}
static struct usb_driver skel_driver = {
.name = "skeleton",
.probe = skel_probe,
.disconnect = skel_disconnect,
.suspend = skel_suspend,
.resume = skel_resume,
.pre_reset = skel_pre_reset,
.post_reset = skel_post_reset,
.id_table = skel_table,
.supports_autosuspend = 1,
};
static int __init usb_skel_init(void)
{
int result;