usb驱动

rt-thread/components/drivers/usb/usbhost/core/usbhost_core.c

@@ -110,7 +110,6 @@ rt_err_t rt_usbh_attatch_instance(uinst_t device)
     rt_usb_hcd_alloc_pipe(device->hcd, &device->pipe_ep0_in, device, &ep0_in_desc);
 
     LOG_D("start enumnation");
-
     /* get device descriptor head */
     ret = rt_usbh_get_descriptor(device, USB_DESC_TYPE_DEVICE, (void*)dev_desc, 8);
     if(ret != RT_EOK)