acard_ahci: use dma_set_mask_and_coherent

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>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/ata/acard-ahci.c b/drivers/ata/acard-ahci.c
index 85357f27a66ba1df312bcffc6de00f99d1867cbd..753985c0151772193f122d90b46df56b2c2815ee 100644 (file)
--- 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);
@@ -471,9 +440,12 @@ 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)