linux-kernel - [PATCH 3/6] MFD:rtsx: Declare that the DMA address limitation is 32bit explicitly

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Message-ID: <dd36f54a34a3fa4667da6a58b72669bdfa97cf5c.1359443488.git.wei_wang@realsil.com.cn>
Date:	Tue, 29 Jan 2013 15:21:34 +0800
From:	<wei_wang@...lsil.com.cn>
To:	<sameo@...ux.intel.com>
CC:	<devel@...uxdriverproject.org>, <linux-kernel@...r.kernel.org>,
	<rogerable@...ltek.com>, Wei WANG <wei_wang@...lsil.com.cn>
Subject: [PATCH 3/6] MFD:rtsx: Declare that the DMA address limitation is 32bit explicitly

From: Wei WANG <wei_wang@...lsil.com.cn>

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

Signed-off-by: Wei WANG <wei_wang@...lsil.com.cn>
---
 drivers/mfd/rtsx_pcr.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
index c021ce3..b2cfd2e 100644
--- a/drivers/mfd/rtsx_pcr.c
+++ b/drivers/mfd/rtsx_pcr.c
@@ -1029,6 +1029,10 @@ static int 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;
-- 
1.7.9.5

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