[v4,3/8] MFD:rtsx: Declare that the DMA address limitation is 32bit explicitly

Commit Message

[e-mail] Jan. 8, 2013, 9:57 a.m. UTC

From: Wei WANG <[e-mail]>

Realtek PCIe card reader only supports 32bit DMA.
This declaration can improve the readability

Signed-off-by: Wei WANG <[e-mail]>
---
 drivers/mfd/rtsx_pcr.c |    4 ++++
 1 file changed, 4 insertions(+)

Patch

diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
index fa2c2bc..1dc64bb 100644
--- a/drivers/mfd/rtsx_pcr.c
+++ b/drivers/mfd/rtsx_pcr.c
@@ -1010,6 +1010,10 @@  static int __devinit rtsx_pci_probe(struct pci_dev *pcidev,
 		pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
 		(int)pcidev->revision);
 
+	ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
+	if (ret < 0)
+		return ret;
+
 	ret = pci_enable_device(pcidev);
 	if (ret)
 		return ret;