From: Jakub Kicinski Date: Thu, 2 Mar 2017 23:26:21 +0000 (-0800) Subject: nfp: correct DMA direction in XDP DMA sync X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d58cebb79b62ff84b537a35423b8d6b7f0746985;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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: ecd63a0217d5 ("nfp: add XDP support in the driver") Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- 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) {