diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-08-26 13:57:19 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-08-26 22:58:58 +0300 |
| commit | b1716871c00dd48a8efa8ee93007490c939fc8c3 (patch) | |
| tree | 85339bfcb022a36c48deca9393753a98c430c29c /drivers/ata | |
| parent | 759ad0979808a586816cf4f01bf5784080343d31 (diff) | |
| download | linux-b1716871c00dd48a8efa8ee93007490c939fc8c3.tar.xz | |
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>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/ahci.c | 33 |
1 files changed, 8 insertions, 25 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index f7652baa6337..ad840f20f8e2 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -901,40 +901,23 @@ static int ahci_pci_device_resume(struct device *dev) static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac) { + const int dma_bits = using_dac ? 64 : 32; int rc; /* * If the device fixup already set the dma_mask to some non-standard * value, don't extend it here. This happens on STA2X11, for example. + * + * XXX: manipulating the DMA mask from platform code is completely + * bogus, platform code should use dev->bus_dma_mask instead.. */ if (pdev->dma_mask && pdev->dma_mask < DMA_BIT_MASK(32)) return 0; - 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; + rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_bits)); + if (rc) + dev_err(&pdev->dev, "DMA enable failed\n"); + return rc; } static void ahci_pci_print_info(struct ata_host *host) |