MTOUCHUSB_REQ_CTRLLR_ID_LEN
u8 *buf __free(kfree) = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {