From d9496f3ecfe4823c1e12aecbcc29220147fa012c Mon Sep 17 00:00:00 2001
From: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Date: Wed, 16 Oct 2019 14:40:32 +0300
Subject: net: netsec: Correct dma sync for XDP_TX frames
bpf_xdp_adjust_head() can change the frame boundaries. Account for the
potential shift properly by calculating the new offset before
syncing the buffer to the device for XDP_TX
Fixes: ba2b232108d3 ("net: netsec: add XDP support")
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/socionext/netsec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
(limited to 'drivers/net/ethernet/socionext')
diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c
index c40294470bfa..869a498e3b5e 100644
--- a/drivers/net/ethernet/socionext/netsec.c
+++ b/drivers/net/ethernet/socionext/netsec.c
@@ -847,8 +847,8 @@ static u32 netsec_xdp_queue_one(struct netsec_priv *priv,
enum dma_data_direction dma_dir =
page_pool_get_dma_dir(rx_ring->page_pool);
- dma_handle = page_pool_get_dma_addr(page) +
- NETSEC_RXBUF_HEADROOM;
+ dma_handle = page_pool_get_dma_addr(page) + xdpf->headroom +
+ sizeof(*xdpf);
dma_sync_single_for_device(priv->dev, dma_handle, xdpf->len,
dma_dir);
tx_desc.buf_type = TYPE_NETSEC_XDP_TX;
--
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