[PATCH 2/5] switchtec: Set DMA coherent mask in Switchtec driver

[Wesley Sheng]

From: Boris Glimcher <boris.glimc...@emc.com>

Switchtec hardware supports 64-bit DMA, set the correct DMA mask.
This allows the CMA to allocate larger buffers for memory windows.

Signed-off-by: Boris Glimcher <boris.glimc...@emc.com>
Signed-off-by: Wesley Sheng <wesley.sh...@microchip.com>
---
 drivers/pci/switch/switchtec.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index d2bca2d..480107e 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -1237,6 +1237,10 @@ static int switchtec_init_pci(struct switchtec_dev 
*stdev,
        if (rc)
                return rc;
 
+       rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
+       if (rc)
+               return rc;
+
        pci_set_master(pdev);
 
        stdev->mmio = pcim_iomap_table(pdev)[0];
-- 
2.7.4