sata_qstor: 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>
This commit is contained in:
Christoph Hellwig 2019-08-26 12:57:23 +02:00 committed by Jens Axboe
parent 51872b6606
commit 440bd77f09

View File

@ -537,33 +537,13 @@ static void qs_host_init(struct ata_host *host, unsigned int chip_id)
static int qs_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base) static int qs_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base)
{ {
u32 bus_info = readl(mmio_base + QS_HID_HPHY); u32 bus_info = readl(mmio_base + QS_HID_HPHY);
int rc, have_64bit_bus = (bus_info & QS_HPHY_64BIT); int dma_bits = (bus_info & QS_HPHY_64BIT) ? 64 : 32;
int rc;
if (have_64bit_bus && rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_bits));
!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { if (rc)
rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); dev_err(&pdev->dev, "%d-bit DMA enable failed\n", dma_bits);
if (rc) { return 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 int qs_ata_init_one(struct pci_dev *pdev, static int qs_ata_init_one(struct pci_dev *pdev,