netdev - [PATCH net] net: mvpp2: prs: fix PPPoE with ipv6 packet parse

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Message-ID: <1608225791-13127-1-git-send-email-stefanc@marvell.com>
Date:   Thu, 17 Dec 2020 19:23:11 +0200
From:   <stefanc@...vell.com>
To:     <netdev@...r.kernel.org>
CC:     <thomas.petazzoni@...tlin.com>, <davem@...emloft.net>,
        <nadavh@...vell.com>, <ymarkman@...vell.com>,
        <linux-kernel@...r.kernel.org>, <stefanc@...vell.com>,
        <kuba@...nel.org>, <linux@...linux.org.uk>, <mw@...ihalf.com>,
        <andrew@...n.ch>, <rmk+kernel@...linux.org.uk>,
        <lironh@...vell.com>
Subject: [PATCH net] net: mvpp2: prs: fix PPPoE with ipv6 packet parse

From: Stefan Chulski <stefanc@...vell.com>

Current PPPoE+IPv6 entry is jumping to 'next-hdr'
field and not to 'DIP' field as done for IPv4.

Fixes: db9d7d36eecc ("net: mvpp2: Split the PPv2 driver to a dedicated directory")
Reported-by: Liron Himi <lironh@...vell.com>
Signed-off-by: Stefan Chulski <stefanc@...vell.com>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
index b9e5b08..1a272c2 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
@@ -1655,8 +1655,9 @@ static int mvpp2_prs_pppoe_init(struct mvpp2 *priv)
 	mvpp2_prs_sram_next_lu_set(&pe, MVPP2_PRS_LU_IP6);
 	mvpp2_prs_sram_ri_update(&pe, MVPP2_PRS_RI_L3_IP6,
 				 MVPP2_PRS_RI_L3_PROTO_MASK);
-	/* Skip eth_type + 4 bytes of IPv6 header */
-	mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN + 4,
+	/* Jump to DIP of IPV6 header */
+	mvpp2_prs_sram_shift_set(&pe, MVPP2_ETH_TYPE_LEN + 8 +
+				 MVPP2_MAX_L3_ADDR_SIZE,
 				 MVPP2_PRS_SRAM_OP_SEL_SHIFT_ADD);
 	/* Set L3 offset */
 	mvpp2_prs_sram_offset_set(&pe, MVPP2_PRS_SRAM_UDF_TYPE_L3,
-- 
1.9.1