linux-kernel - [PATCH] net: stmmac: Fix the problem of tso

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Message-ID: <1571309950-43543-1-git-send-email-zhangshaokun@hisilicon.com>
Date:   Thu, 17 Oct 2019 18:59:10 +0800
From:   Shaokun Zhang <zhangshaokun@...ilicon.com>
To:     <netdev@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     yuqi jin <jinyuqi@...wei.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "Jose Abreu" <joabreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Maxime Coquelin" <mcoquelin.stm32@...il.com>,
        Shaokun Zhang <zhangshaokun@...ilicon.com>
Subject: [PATCH] net: stmmac: Fix the problem of tso_xmit

From: yuqi jin <jinyuqi@...wei.com>

When the address width of DMA is greater than 32, the packet header occupies
a BD descriptor. The starting address of the data should be added to the
header length.

Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: Alexandre Torgue <alexandre.torgue@...com>
Cc: Jose Abreu <joabreu@...opsys.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
Signed-off-by: yuqi jin <jinyuqi@...wei.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@...ilicon.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c76a1336a451..3e02e64c5fa0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2995,6 +2995,7 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
 	} else {
 		stmmac_set_desc_addr(priv, first, des);
 		tmp_pay_len = pay_len;
+		des += proto_hdr_len;
 	}
 
 	stmmac_tso_allocator(priv, des, tmp_pay_len, (nfrags == 0), queue);
-- 
2.7.4