sgiwd93: convert to dma_alloc_noncoherent

Use the new non-coherent DMA API including proper ownership transfers.
This also means we can allocate the memory as DMA_TO_DEVICE instead
of bidirectional.

Signed-off-by: Christoph Hellwig <[e-mail]>
Tested-by: Thomas Bogendoerfer <[e-mail]>

drivers/scsi/sgiwd93.c

···
 	 */
 	hcp->desc.pbuf = 0;
 	hcp->desc.cntinfo = HPCDMA_EOX;
-	dma_cache_sync(hd->dev, hd->cpu,
+	dma_sync_single_for_device(hd->dev, hd->dma,
 		       (unsigned long)(hcp + 1) - (unsigned long)hd->cpu,
 		       DMA_TO_DEVICE);
 }
···
 
 	hdata = host_to_hostdata(host);
 	hdata->dev = &pdev->dev;
-	hdata->cpu = dma_alloc_attrs(&pdev->dev, HPC_DMA_SIZE, &hdata->dma,
-				     GFP_KERNEL, DMA_ATTR_NON_CONSISTENT);
+	hdata->cpu = dma_alloc_noncoherent(&pdev->dev, HPC_DMA_SIZE,
+				&hdata->dma, DMA_TO_DEVICE, GFP_KERNEL);
 	if (!hdata->cpu) {
 		printk(KERN_WARNING "sgiwd93: Could not allocate memory for "
 		       "host %d buffer.\n", unit);
···
 out_irq:
 	free_irq(irq, host);
 out_free:
-	dma_free_attrs(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma,
-		       DMA_ATTR_NON_CONSISTENT);
+	dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma,
+			DMA_TO_DEVICE);
 out_put:
 	scsi_host_put(host);
 out:
···
 
 	scsi_remove_host(host);
 	free_irq(pd->irq, host);
-	dma_free_attrs(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma,
-		       DMA_ATTR_NON_CONSISTENT);
+	dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma,
+			DMA_TO_DEVICE);
 	scsi_host_put(host);
 	return 0;
 }