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net: mana: Add handling of CQE_RX_TRUNCATED 

The proper way to drop this kind of CQE is advancing rxq tail
without indicating the packet to the upper network layer.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haiyang Zhang 2022-02-04 14:45:44 -08:00 committed by David S. Miller
parent 8f4f9c93c7
commit e4b7621982
1 changed files with 5 additions and 2 deletions
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7
drivers/net/ethernet/microsoft/mana/mana_en.c
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@ -1085,8 +1085,10 @@ static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq,
break;
case CQE_RX_TRUNCATED:
netdev_err(ndev, "Dropped a truncated packet\n");
return;
++ndev->stats.rx_dropped;
rxbuf_oob = &rxq->rx_oobs[rxq->buf_index];
netdev_warn_once(ndev, "Dropped a truncated packet\n");
goto drop;
case CQE_RX_COALESCED_4:
netdev_err(ndev, "RX coalescing is unsupported\n");
@ -1154,6 +1156,7 @@ static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq,
mana_rx_skb(old_buf, oob, rxq);
drop:
mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu);
mana_post_pkt_rxq(rxq);