linux-kernel - [PATCH] net: ll_temac: Fix DMA map size bug

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Message-Id: <d76f13c52ce740544e8fac27f2a5904b9537a226.1431410298.git.michal.simek@xilinx.com>
Date:	Tue, 12 May 2015 07:58:22 +0200
From:	Michal Simek <michal.simek@...inx.com>
To:	netdev@...r.kernel.org
Cc:	Sören Brinkmann <soren.brinkmann@...inx.com>,
	monstr@...str.eu, Fabian Frederick <fabf@...net.be>,
	linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Manuel Schölling <manuel.schoelling@....de>,
	Julia Lawall <julia.lawall@...6.fr>,
	Markus Elfring <elfring@...rs.sourceforge.net>,
	Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@...inx.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] net: ll_temac: Fix DMA map size bug

DMA allocates skb->len instead of headlen
which is used for DMA.

Signed-off-by: Michal Simek <michal.simek@...inx.com>
---

 drivers/net/ethernet/xilinx/ll_temac_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c
index ca640d04fd93..cfb6bdb37fdc 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -705,8 +705,8 @@ static int temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 
 	cur_p->app0 |= STS_CTRL_APP0_SOP;
 	cur_p->len = skb_headlen(skb);
-	cur_p->phys = dma_map_single(ndev->dev.parent, skb->data, skb->len,
-				     DMA_TO_DEVICE);
+	cur_p->phys = dma_map_single(ndev->dev.parent, skb->data,
+				skb_headlen(skb), DMA_TO_DEVICE);
 	cur_p->app4 = (unsigned long)skb;
 
 	for (ii = 0; ii < num_frag; ii++) {
-- 
2.3.5

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