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net: netsec: Correct dma sync for XDP_TX frames 

[ Upstream commit d9496f3ecfe4823c1e12aecbcc29220147fa012c ]

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: ba2b232108 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ilias Apalodimas 2019-10-16 14:40:32 +03:00 committed by Greg Kroah-Hartman
parent 238ca6417e
commit c99f4a8c66
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/socionext/netsec.c
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@ -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;