[PATCH 1/5] thunderbolt: Use 64-bit DMA mask if supported by the platform

[Mika Westerberg]

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.westerb...@linux.intel.com>
---
 drivers/thunderbolt/nhi.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index f5a33e88e676..e3b7695fe37e 100644
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -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);
-- 
2.17.1