diff options
Diffstat (limited to 'drivers/net/ethernet/freescale/enetc')
| -rw-r--r-- | drivers/net/ethernet/freescale/enetc/enetc.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c index 0b84d4a74889..f0ba612d5ce3 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.c +++ b/drivers/net/ethernet/freescale/enetc/enetc.c @@ -1175,9 +1175,7 @@ static void enetc_build_xdp_buff(struct enetc_bdr *rx_ring, u32 bd_status, } /* Convert RX buffer descriptors to TX buffer descriptors. These will be - * recycled back into the RX ring in enetc_clean_tx_ring. We need to scrub the - * RX software BDs because the ownership of the buffer no longer belongs to the - * RX ring, so enetc_refill_rx_ring may not reuse rx_swbd->page. + * recycled back into the RX ring in enetc_clean_tx_ring. */ static int enetc_rx_swbd_to_xdp_tx_swbd(struct enetc_tx_swbd *xdp_tx_arr, struct enetc_bdr *rx_ring, @@ -1199,7 +1197,6 @@ static int enetc_rx_swbd_to_xdp_tx_swbd(struct enetc_tx_swbd *xdp_tx_arr, tx_swbd->is_dma_page = true; tx_swbd->is_xdp_tx = true; tx_swbd->is_eof = false; - memset(rx_swbd, 0, sizeof(*rx_swbd)); } /* We rely on caller providing an rx_ring_last > rx_ring_first */ @@ -1317,6 +1314,17 @@ static int enetc_clean_rx_ring_xdp(struct enetc_bdr *rx_ring, tx_ring->stats.xdp_tx += xdp_tx_bd_cnt; rx_ring->xdp.xdp_tx_in_flight += xdp_tx_bd_cnt; xdp_tx_frm_cnt++; + /* The XDP_TX enqueue was successful, so we + * need to scrub the RX software BDs because + * the ownership of the buffers no longer + * belongs to the RX ring, and we must prevent + * enetc_refill_rx_ring() from reusing + * rx_swbd->page. + */ + while (orig_i != i) { + rx_ring->rx_swbd[orig_i].page = NULL; + enetc_bdr_idx_inc(rx_ring, &orig_i); + } } break; case XDP_REDIRECT: |