linux-kernel - [PATCH 1/5] staging: fsl-dpaa2/eth: Fix DMA mapping direction

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Message-Id: <20180709150111.8875-2-ruxandra.radulescu@nxp.com>
Date:   Mon,  9 Jul 2018 10:01:07 -0500
From:   Ioana Radulescu <ruxandra.radulescu@....com>
To:     gregkh@...uxfoundation.org
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        ioana.ciornei@....com
Subject: [PATCH 1/5] staging: fsl-dpaa2/eth: Fix DMA mapping direction

We are using DMA_FROM_DEVICE when mapping RX frame buffers,
but DMA_BIDIRECTIONAL for unmap. Fix the direction for DMA
unmapping operation.

Fixes: 87eb55e418b7 ("staging: fsl-dpaa2/eth: Fix potential endless loop")

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@....com>
---
 drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
index 3963717..537d5bb 100644
--- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
+++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
@@ -767,7 +767,7 @@ static void free_bufs(struct dpaa2_eth_priv *priv, u64 *buf_array, int count)
 	for (i = 0; i < count; i++) {
 		vaddr = dpaa2_iova_to_virt(priv->iommu_domain, buf_array[i]);
 		dma_unmap_single(dev, buf_array[i], DPAA2_ETH_RX_BUF_SIZE,
-				 DMA_BIDIRECTIONAL);
+				 DMA_FROM_DEVICE);
 		skb_free_frag(vaddr);
 	}
 }
-- 
2.7.4