diff mbox

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

Message ID 20170302232621.39763-3-jakub.kicinski@netronome.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Jakub Kicinski March 2, 2017, 11:26 p.m. UTC 
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.kicinski@netronome.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox

Patch

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) {