XGENE_DMA_GCR
val = ioread32(pdma->csr_dma + XGENE_DMA_GCR);
iowrite32(val, pdma->csr_dma + XGENE_DMA_GCR);
val = ioread32(pdma->csr_dma + XGENE_DMA_GCR);
iowrite32(val, pdma->csr_dma + XGENE_DMA_GCR);