Symbol: usbsacm_wait_tx_drain
usr/src/uts/common/io/usb/clients/usbser/usbsacm/usbsacm.c
1415
if (usbsacm_wait_tx_drain(acm_port, timeout) != USB_SUCCESS) {
usr/src/uts/common/io/usb/clients/usbser/usbsacm/usbsacm.c
262
static int usbsacm_wait_tx_drain(usbsacm_port_t *, int);