[PATCH 1/8] acard_ahci: use dma_set_mask_and_coherent

[Christoph Hellwig <hch@lst.de>]

Use the dma_set_mask_and_coherent helper to set the DMA mask.  Rely
on the relatively recent change that setting a larger than required
mask will never fail to avoid the need for the boilerplate 32-bit
fallback code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/ata/acard-ahci.c | 38 +++++---------------------------------
 1 file changed, 5 insertions(+), 33 deletions(-)

diff --git a/drivers/ata/acard-ahci.c b/drivers/ata/acard-ahci.c
index b1b49dbd0b14..c67d6eb92d68 100644
--- a/drivers/ata/acard-ahci.c
+++ b/drivers/ata/acard-ahci.c
@@ -160,37 +160,6 @@ static int acard_ahci_pci_device_resume(struct pci_dev *pdev)
 }
 #endif
 
-static int acard_ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
-{
-	int rc;
-
-	if (using_dac &&
-	    !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
-		rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
-		if (rc) {
-			rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
-			if (rc) {
-				dev_err(&pdev->dev,
-					   "64-bit DMA enable failed\n");
-				return rc;
-			}
-		}
-	} else {
-		rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
-		if (rc) {
-			dev_err(&pdev->dev, "32-bit DMA enable failed\n");
-			return rc;
-		}
-		rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
-		if (rc) {
-			dev_err(&pdev->dev,
-				"32-bit consistent DMA enable failed\n");
-			return rc;
-		}
-	}
-	return 0;
-}
-
 static void acard_ahci_pci_print_info(struct ata_host *host)
 {
 	struct pci_dev *pdev = to_pci_dev(host->dev);
@@ -472,9 +441,12 @@ static int acard_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id
 	}
 
 	/* initialize adapter */
-	rc = acard_ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
-	if (rc)
+	rc = dma_set_mask_and_coherent(&pdev->dev,
+			DMA_BIT_MASK((hpriv->cap & HOST_CAP_64) ? 64 : 32));
+	if (rc) {
+		dev_err(&pdev->dev, "DMA enable failed\n");
 		return rc;
+	}
 
 	rc = ahci_reset_controller(host);
 	if (rc)
-- 
2.20.1