From abc256b7ae57e93b23606c6587b906af94920aa3 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Fri, 15 Feb 2019 12:16:51 -0800
Subject: [PATCH 1/3] net: systemport: Fix reception of BPDUs
Git-commit: a40061ea2e39494104602b3048751341bda374a1
Patch-mainline: v5.0-rc8
References: git-fixes
SYSTEMPORT has its RXCHK parser block that attempts to validate the
packet structures, unfortunately setting the L2 header check bit will
cause Bridge PDUs (BPDUs) to be incorrectly rejected because they look
like LLC/SNAP packets with a non-IPv4 or non-IPv6 Ethernet Type.
Fixes: 4e8aedfe78c7 ("net: systemport: Turn on offloads by default")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
drivers/net/ethernet/broadcom/bcmsysport.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 14ade8906476..6156a7b25252 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -134,6 +134,10 @@ static int bcm_sysport_set_rx_csum(struct net_device *dev,
priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM);
reg = rxchk_readl(priv, RXCHK_CONTROL);
+ /* Clear L2 header checks, which would prevent BPDUs
+ * from being received.
+ */
+ reg &= ~RXCHK_L2_HDR_DIS;
if (priv->rx_chk_en)
reg |= RXCHK_EN;
else
--
2.16.4