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nfp: correct DMA direction in XDP DMA sync 

dma_sync_single_for_*() takes the direction in which the buffer
was mapped, not the direction of the sync.  We should sync XDP
buffers bidirectionally.

Fixes: ecd63a0217 ("nfp: add XDP support in the driver")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2017-03-02 15:26:21 -08:00 committed by David S. Miller
parent 9383b33771
commit d58cebb79b
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
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@ -1498,7 +1498,7 @@ nfp_net_tx_xdp_buf(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring,
txbuf->real_len = pkt_len;
dma_sync_single_for_device(&nn->pdev->dev, rxbuf->dma_addr + pkt_off,
pkt_len, DMA_TO_DEVICE);
pkt_len, DMA_BIDIRECTIONAL);
/* Build TX descriptor */
txd = &tx_ring->txds[wr_idx];
@ -1611,7 +1611,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
dma_sync_single_for_cpu(&nn->pdev->dev,
rxbuf->dma_addr + pkt_off,
pkt_len, DMA_FROM_DEVICE);
pkt_len, DMA_BIDIRECTIONAL);
act = nfp_net_run_xdp(xdp_prog, rxbuf->frag + data_off,
pkt_len);
switch (act) {