MCSR
if (readl_relaxed(MCSR(m)) & MCSR_CRC) {
writel(-1, MCSR(m));
writel_relaxed(-1, MCSR(m));
if (readl_relaxed(MCSR(m)) & MCSR_CWC) {
writel(MCSR_EOC, ac97_reg_base + MCSR);