[PATCH] net: stmmac: Disable unsolicited checksum insertion for AF_XDP TX

[Jisheng Zhang <jszhang@kernel.org>]

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