MPU_CTRL 350 sound/pci/ice1712/ice1724.c if (inb(ICEREG1724(ice, MPU_CTRL)) & VT1724_MPU_TX_EMPTY) MPU_CTRL 2755 sound/pci/ice1712/ice1724.c outb(VT1724_MPU_UART, ICEREG1724(ice, MPU_CTRL));