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From:   Esben Haabendal <esben@geanix.com>
To:     netdev@vger.kernel.org
Cc:     "David S. Miller" <davem@davemloft.net>,
        Michal Simek <michal.simek@xilinx.com>,
        YueHaibing <yuehaibing@huawei.com>,
        Yang Wei <yang.wei9@zte.com.cn>,
        Luis Chamberlain <mcgrof@kernel.org>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 08/12] net: ll_temac: Fix iommu/swiotlb leak
Date:   Mon, 29 Apr 2019 10:34:18 +0200
Message-Id: <20190429083422.4356-9-esben@geanix.com>
In-Reply-To: <20190429083422.4356-1-esben@geanix.com>
References: <20190426073231.4008-1-esben@geanix.com>
 <20190429083422.4356-1-esben@geanix.com>
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Unmap the actual buffer length, not the amount of data received, avoiding
resource exhaustion of swiotlb (seen on x86_64 platform).

Signed-off-by: Esben Haabendal <esben@geanix.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 1c5d126..72ec338 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