static void tusb_exit_module(void)
{
kfree(ltp_usb.dev);
#if 0
usb_free_bus(ltp_usb.bus);
#endif
unregister_chrdev(Major, DEVICE_NAME);
usb_deregister(&test_usb_driver);
}
int usb_find_busses(void)
{
struct usb_bus *busses, *bus;
int ret, changes = 0;
ret = usb_os_find_busses(&busses);
if (ret < 0)
return ret;
/*
* Now walk through all of the busses we know about and compare against
* this new list. Any duplicates will be removed from the new list.
* If we don't find it in the new list, the bus was removed. Any
* busses still in the new list, are new to us.
*/
bus = usb_busses;
while (bus) {
int found = 0;
struct usb_bus *nbus, *tbus = bus->next;
nbus = busses;
while (nbus) {
struct usb_bus *tnbus = nbus->next;
if (!strcmp(bus->dirname, nbus->dirname)) {
/* Remove it from the new busses list */
LIST_DEL(busses, nbus);
usb_free_bus(nbus);
found = 1;
break;
}
nbus = tnbus;
}
if (!found) {
/* The bus was removed from the system */
LIST_DEL(usb_busses, bus);
usb_free_bus(bus);
changes++;
}
bus = tbus;
}
/*
* Anything on the *busses list is new. So add them to usb_busses and
* process them like the new bus it is.
*/
bus = busses;
while (bus) {
struct usb_bus *tbus = bus->next;
/*
* Remove it from the temporary list first and add it to the real
* usb_busses list.
*/
LIST_DEL(busses, bus);
LIST_ADD(usb_busses, bus);
changes++;
bus = tbus;
}
return changes;
}
