From: Lars Persson <lars.persson@axis.com>
Date: Tue, 12 Jan 2016 14:28:13 +0000 (+0100)
Subject: dwc_eth_qos: Fix dma address for multi-fragment skbs
X-Git-Tag: v4.3.5~53
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6b4938efb10a801e8ca99926ccd18d095b8cd7dc;p=thirdparty%2Fkernel%2Fstable.git

dwc_eth_qos: Fix dma address for multi-fragment skbs

[ Upstream commit d461873272169a3fc3a8d155d7b1c92e9d97b419 ]

The offset inside the fragment was not used for the dma address and
silent data corruption resulted because TSO makes the checksum match.

Fixes: 077742dac2c7 ("dwc_eth_qos: Add support for Synopsys DWC Ethernet QoS")
Signed-off-by: Lars Persson <larper@axis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/ethernet/synopsys/dwc_eth_qos.c b/drivers/net/ethernet/synopsys/dwc_eth_qos.c
index 85b3326775b82..37640e11afa67 100644
--- a/drivers/net/ethernet/synopsys/dwc_eth_qos.c
+++ b/drivers/net/ethernet/synopsys/dwc_eth_qos.c
@@ -2107,7 +2107,7 @@ static int dwceqos_tx_frags(struct sk_buff *skb, struct net_local *lp,
 			dd = &lp->tx_descs[lp->tx_next];
 
 			/* Set DMA Descriptor fields */
-			dd->des0 = dma_handle;
+			dd->des0 = dma_handle + consumed_size;
 			dd->des1 = 0;
 			dd->des2 = dma_size;