[PATCH] net: stmmac: Disable unsolicited checksum insertion for AF_XDP TX
From: Jisheng Zhang <jszhang@kernel.org>
Date: 2026-09-29 12:30:28
Also in:
linux-arm-kernel, lkml
Subsystem:
networking drivers, stmmac ethernet driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Maxime Chevallier, Linus Torvalds
stmmac enables TX checksum insertion for every AF_XDP packet on queues
that support it. The driver does not implement tmo_request_checksum(), so
it enables the offload regardless of whether the application requested it
and ignores the requested checksum offsets.
Disable checksum insertion in the AF_XDP TX path. Applications must supply
complete checksums until the driver can honor AF_XDP checksum metadata.
Fixes: 132c32ee5bc0 ("net: stmmac: Add TX via XDP zero-copy socket")
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 8fe75b00974f..2db862f5abdb 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c@@ -2683,7 +2683,6 @@ static bool stmmac_xdp_xmit_zc(struct stmmac_priv *priv, u32 queue, u32 budget) struct netdev_queue *nq = netdev_get_tx_queue(priv->dev, queue); struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue]; struct stmmac_txq_stats *txq_stats = &priv->xstats.txq_stats[queue]; - bool csum = !priv->plat->tx_queues_cfg[queue].coe_unsupported; struct xsk_buff_pool *pool = tx_q->xsk_pool; unsigned int entry = tx_q->cur_tx; struct dma_desc *tx_desc = NULL;
@@ -2762,7 +2761,7 @@ static bool stmmac_xdp_xmit_zc(struct stmmac_priv *priv, u32 queue, u32 budget) } stmmac_prepare_tx_desc(priv, tx_desc, 1, xdp_desc.len, - csum, priv->descriptor_mode, true, true, + false, priv->descriptor_mode, true, true, xdp_desc.len); stmmac_enable_dma_transmission(priv, priv->ioaddr, queue);
--
2.53.0