[PATCH net 2/2] nfp: correct DMA direction in XDP DMA sync

[Jakub Kicinski]

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: ecd63a0217d5 ("nfp: add XDP support in the driver")
Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c 
b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 00a83218857a..9179a99563af 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -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) {
-- 
2.11.0