[PATCH 4.3 106/157] dwc_eth_qos: Fix dma address for multi-fragment skbs

From: Greg Kroah-Hartman
Date: Wed Jan 27 2016 - 13:43:35 EST


4.3-stable review patch. If anyone has any objections, please let me know.

------------------

From: Lars Persson <lars.persson@xxxxxxxx>

[ 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@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/synopsys/dwc_eth_qos.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- 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_bu
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;