linux-kernel - [PATCH 08/12] net: ll_temac: Fix iommu/swiotlb leak

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Date:   Fri, 26 Apr 2019 09:32:27 +0200
From:   Esben Haabendal <esben@...nix.com>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Michal Simek <michal.simek@...inx.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        YueHaibing <yuehaibing@...wei.com>,
        Yang Wei <yang.wei9@....com.cn>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 08/12] net: ll_temac: Fix iommu/swiotlb leak

Unmap the actual buffer length, not the amount of data received.

Signed-off-by: Esben Haabendal <esben@...nix.com>
---
 drivers/net/ethernet/xilinx/ll_temac_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c
index 309f149..56d8077 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -821,7 +821,7 @@ static void ll_temac_recv(struct net_device *ndev)
 		length = be32_to_cpu(cur_p->app4) & 0x3FFF;
 
 		dma_unmap_single(ndev->dev.parent, be32_to_cpu(cur_p->phys),
-				 length, DMA_FROM_DEVICE);
+				 XTE_MAX_JUMBO_FRAME_SIZE, DMA_FROM_DEVICE);
 
 		skb_put(skb, length);
 		skb->protocol = eth_type_trans(skb, ndev);
-- 
2.4.11