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sata_mv: 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 12:57:21 +02:00 committed by Jens Axboe
parent 94c58148a6
commit 496d4575e7
1 changed files with 4 additions and 34 deletions
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38
drivers/ata/sata_mv.c
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@ -4314,38 +4314,6 @@ static struct pci_driver mv_pci_driver = {
};
/* move to PCI layer or libata core? */
static int pci_go_64(struct pci_dev *pdev)
{
int rc;
if (!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 rc;
}
/**
* mv_print_info - Dump key info to kernel log for perusal.
* @host: ATA host to print info about
@ -4430,9 +4398,11 @@ static int mv_pci_init_one(struct pci_dev *pdev,
host->iomap = pcim_iomap_table(pdev);
hpriv->base = host->iomap[MV_PRIMARY_BAR];
rc = pci_go_64(pdev);
if (rc)
rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (rc) {
dev_err(&pdev->dev, "DMA enable failed\n");
return rc;
}
rc = mv_create_dma_pools(hpriv, &pdev->dev);
if (rc)