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Miller" , Michal Simek , YueHaibing , Yang Wei , Luis Chamberlain , 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> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190429083422.4356-1-esben@geanix.com> References: <20190426073231.4008-1-esben@geanix.com> <20190429083422.4356-1-esben@geanix.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,UNPARSEABLE_RELAY,URIBL_BLOCKED autolearn=disabled version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on 3e0c63300934 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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