static void omx_xenfront_backend_changed(struct xenbus_device *dev,
enum xenbus_state backend_state)
{
struct omx_xenfront_info *fe = dev_get_drvdata(&dev->dev);
int ret = 0;
dprintk_in();
dprintk_deb("backend state %s\n", xenbus_strstate(backend_state));
switch (backend_state) {
case XenbusStateInitialising:
case XenbusStateInitWait:
break;
case XenbusStateInitialised:
ret = talk_to_backend(dev, fe);
if (ret) {
printk_err("Error trying to talk to backend"
", ret=%d\n", ret);
//kfree(info);
}
break;
case XenbusStateReconfiguring:
case XenbusStateReconfigured:
case XenbusStateUnknown:
case XenbusStateClosed:
break;
case XenbusStateConnected:
if (dev->state == XenbusStateConnected)
break;
omx_xenfront_connect(fe);
break;
case XenbusStateClosing:
dprintk_deb("Closing Xenbus\n");
xenbus_frontend_closed(dev);
break;
}
dprintk_out();
return;
}
static int connect(struct xenbus_device *dev)
{
struct usbfront_info *info = dev->dev.driver_data;
usbif_conn_request_t *req;
int i, idx, err;
int notify;
char name[TASK_COMM_LEN];
struct usb_hcd *hcd;
hcd = info_to_hcd(info);
snprintf(name, TASK_COMM_LEN, "xenhcd.%d", hcd->self.busnum);
err = talk_to_backend(dev, info);
if (err)
return err;
info->kthread = kthread_run(xenhcd_schedule, info, name);
if (IS_ERR(info->kthread)) {
err = PTR_ERR(info->kthread);
info->kthread = NULL;
xenbus_dev_fatal(dev, err, "Error creating thread");
return err;
}
/* prepare ring for hotplug notification */
for (idx = 0, i = 0; i < USB_CONN_RING_SIZE; i++) {
req = RING_GET_REQUEST(&info->conn_ring, idx);
req->id = idx;
idx++;
}
info->conn_ring.req_prod_pvt = idx;
RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&info->conn_ring, notify);
if (notify)
notify_remote_via_irq(info->irq);
return 0;
}