From: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> commit e4b7621982d29f26ff4d39af389e5e675a4ffed4 upstream. 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@xxxxxxxxxxxxx> Reviewed-by: Dexuan Cui <decui@xxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/microsoft/mana/mana_en.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/microsoft/mana/mana_en.c +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c @@ -980,8 +980,10 @@ static void mana_process_rx_cqe(struct m 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"); @@ -1043,6 +1045,7 @@ static void mana_process_rx_cqe(struct m 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);
