Commit d9496f3e authored Oct 16, 2019 by Ilias Apalodimas Committed by David S. Miller Oct 17, 2019

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: ba2b2321 ("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>

parent 4eab421b

drivers/net/ethernet/socionext/netsec.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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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