MSGDMA_CSR_STATUS
iowrite32(MSGDMA_CSR_STAT_MASK, mdev->csr + MSGDMA_CSR_STATUS);
ret = readl_poll_timeout(mdev->csr + MSGDMA_CSR_STATUS, val,
iowrite32(MSGDMA_CSR_STAT_MASK, mdev->csr + MSGDMA_CSR_STATUS);
while (ioread32(mdev->csr + MSGDMA_CSR_STATUS) &
status = ioread32(mdev->csr + MSGDMA_CSR_STATUS);
iowrite32(MSGDMA_CSR_STAT_IRQ, mdev->csr + MSGDMA_CSR_STATUS);