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net: fec: correct rx_bytes statistic for the case SHIFT16 is set

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[ Upstream commit ad17e7e92a7c52ce70bb764813fcf99464f96903 ]

Two additional bytes in front of each frame received into the RX FIFO if
SHIFT16 is set, so we need to subtract the extra two bytes from pkt_len
to correct the statistic of rx_bytes.

Fixes: 3ac72b7b63 ("net: fec: align IP header in hardware")
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20251106021421.2096585-1-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Wei Fang 2025-11-06 10:14:21 +08:00 • committed by Greg Kroah-Hartman
commit e78b093bad
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/freescale/fec_main.c
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@ -1530,6 +1530,8 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
ndev->stats.rx_packets++;
pkt_len = fec16_to_cpu(bdp->cbd_datlen);
ndev->stats.rx_bytes += pkt_len;
if (fep->quirks & FEC_QUIRK_HAS_RACC)
ndev->stats.rx_bytes -= 2;
index = fec_enet_get_bd_index(bdp, &rxq->bd);
skb = rxq->rx_skbuff[index];