netdev - [PATCH net-next v2 1/2] amd-xgbe: Use dma_set_mask_and

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Message-ID: <20140805183038.32561.86398.stgit@tlendack-t1.amdoffice.net>
Date:	Tue, 5 Aug 2014 13:30:38 -0500
From:	Tom Lendacky <thomas.lendacky@....com>
To:	<netdev@...r.kernel.org>
CC:	<davem@...emloft.net>
Subject: [PATCH net-next v2 1/2] amd-xgbe: Use dma_set_mask_and_coherent to
 set DMA mask

Use the dma_set_mask_and_coherent function to set the DMA mask rather
than setting the DMA mask fields directly.  This was originally done
to work around a bug in the arm64 DMA support when RAM started above
the 4GB boundary which has since been fixed.

Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
---
 drivers/net/ethernet/amd/xgbe/xgbe-main.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
index ec977d3..8aa6a93 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
@@ -303,8 +303,11 @@ static int xgbe_probe(struct platform_device *pdev)
 	/* Set the DMA mask */
 	if (!dev->dma_mask)
 		dev->dma_mask = &dev->coherent_dma_mask;
-	*(dev->dma_mask) = DMA_BIT_MASK(40);
-	dev->coherent_dma_mask = DMA_BIT_MASK(40);
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
+	if (ret) {
+		dev_err(dev, "dma_set_mask_and_coherent failed\n");
+		goto err_io;
+	}
 
 	if (of_property_read_bool(dev->of_node, "dma-coherent")) {
 		pdata->axdomain = XGBE_DMA_OS_AXDOMAIN;

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