MHSIZ
return msg_head->nframes * op->cfsiz + MHSIZ;
return msg_head->nframes * op->cfsiz + MHSIZ;
return cfsiz + MHSIZ;
if (size < MHSIZ)
ret = memcpy_from_msg((u8 *)&msg_head, msg, MHSIZ);
if ((size - MHSIZ) % cfsiz)
ret = MHSIZ;
ret = MHSIZ;
if ((msg_head.nframes != 1) || (size != cfsiz + MHSIZ))
return MHSIZ;