linux-kernel - [net] Octeontx2-vf: Fix max packet length errors

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Message-ID: <20250702110518.631532-1-hkelam@marvell.com>
Date: Wed, 2 Jul 2025 16:35:18 +0530
From: Hariprasad Kelam <hkelam@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: Hariprasad Kelam <hkelam@...vell.com>,
        Sunil Goutham
	<sgoutham@...vell.com>,
        Geetha sowjanya <gakula@...vell.com>,
        "Subbaraya
 Sundeep" <sbhatta@...vell.com>,
        Bharat Bhushan <bbhushan2@...vell.com>,
        "Andrew Lunn" <andrew+netdev@...n.ch>,
        "David S. Miller"
	<davem@...emloft.net>,
        "Eric Dumazet" <edumazet@...gle.com>,
        Jakub Kicinski
	<kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
        Tomasz Duszynski
	<tduszynski@...vell.com>
Subject: [net] Octeontx2-vf: Fix max packet length errors

Implement packet length validation before submitting packets to
the hardware to prevent MAXLEN_ERR.

Fixes: 3184fb5ba96e ("octeontx2-vf: Virtual function driver support")
Signed-off-by: Hariprasad Kelam <hkelam@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
index 8a8b598bd389..766237cd86c3 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c
@@ -394,6 +394,13 @@ static netdev_tx_t otx2vf_xmit(struct sk_buff *skb, struct net_device *netdev)
 	struct otx2_snd_queue *sq;
 	struct netdev_queue *txq;
 
+	/* Check for minimum and maximum packet length */
+	if (skb->len <= ETH_HLEN ||
+	    (!skb_shinfo(skb)->gso_size && skb->len > vf->tx_max_pktlen)) {
+		dev_kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
 	sq = &vf->qset.sq[qidx];
 	txq = netdev_get_tx_queue(netdev, qidx);
 
-- 
2.34.1