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net: enetc: recycle buffers for frames with RX errors

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When receiving a frame with errors, currently we do nothing with it (we
don't construct an skb or an xdp_buff), we just exit the NAPI poll loop.

Let's put the buffer back into the RX ring (similar to XDP_DROP).

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2021-04-17 00:22:18 +03:00 • committed by David S. Miller
parent 6b04830d5e
commit 672f9a2198
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/freescale/enetc/enetc.c
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@ -822,12 +822,14 @@ static bool enetc_check_bd_errors_and_consume(struct enetc_bdr *rx_ring,
if (likely(!(bd_status & ENETC_RXBD_LSTATUS(ENETC_RXBD_ERR_MASK))))
return false;
enetc_put_rx_buff(rx_ring, &rx_ring->rx_swbd[*i]);
enetc_rxbd_next(rx_ring, rxbd, i);
while (!(bd_status & ENETC_RXBD_LSTATUS_F)) {
dma_rmb();
bd_status = le32_to_cpu((*rxbd)->r.lstatus);
enetc_put_rx_buff(rx_ring, &rx_ring->rx_swbd[*i]);
enetc_rxbd_next(rx_ring, rxbd, i);
}