linux-kernel - [PATCH 5.10 005/145] net: mvpp2: prs: fix PPPoE with ipv6 packet parse

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Date:   Mon, 11 Jan 2021 14:00:29 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Liron Himi <lironh@...vell.com>,
        Stefan Chulski <stefanc@...vell.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 5.10 005/145] net: mvpp2: prs: fix PPPoE with ipv6 packet parse

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

[ Upstream commit fec6079b2eeab319d9e3d074f54d3b6f623e9701 ]

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

Fixes: 3f518509dedc ("ethernet: Add new driver for Marvell Armada 375 network unit")
Reported-by: Liron Himi <lironh@...vell.com>
Signed-off-by: Stefan Chulski <stefanc@...vell.com>
Link: https://lore.kernel.org/r/1608230266-22111-1-git-send-email-stefanc@marvell.com
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
@@ -1680,8 +1680,9 @@ static int mvpp2_prs_pppoe_init(struct m
 	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,