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acard_ahci: use dma_set_mask_and_coherent

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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>
This commit is contained in:
Christoph Hellwig 2019-08-26 12:57:18 +02:00 committed by Jens Axboe
parent 12ce6b0d21
commit 759ad09798
1 changed files with 5 additions and 33 deletions
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38
drivers/ata/acard-ahci.c
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@ -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)