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thunderbolt: Use 64-bit DMA mask if supported by the platform

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PCI defaults to 32-bit DMA mask but this device is capable of full
64-bit addressing, so make sure we first try 64-bit DMA mask before
falling back to the default 32-bit.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mika Westerberg 2018-07-25 11:03:16 +03:00 committed by Greg Kroah-Hartman
parent c356915ebc
commit dba3caf621
1 changed files with 8 additions and 0 deletions
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8
drivers/thunderbolt/nhi.c
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@ -1015,6 +1015,14 @@ static int nhi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
spin_lock_init(&nhi->lock);
res = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (res)
res = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (res) {
dev_err(&pdev->dev, "failed to set DMA mask\n");
return res;
}
pci_set_master(pdev);
tb = icm_probe(nhi);