linux-kernel - [PATCH net] mvpp2: enable rxhash only on the first port

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200509141546.5750-1-mcroce@redhat.com>
Date:   Sat,  9 May 2020 16:15:46 +0200
From:   Matteo Croce <mcroce@...hat.com>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Stefan Chulski <stefanc@...vell.com>
Subject: [PATCH net] mvpp2: enable rxhash only on the first port

Currently rxhash only works on the first port of the CP (Communication
Processor). Enabling it on other ports completely blocks packet reception.
This patch only adds rxhash as supported feature to the first port,
so rxhash can't be enabled on other ports:

	# ethtool -K eth0 rxhash on
	# ethtool -K eth1 rxhash on
	# ethtool -K eth2 rxhash on
	Cannot change receive-hashing
	Could not change any device features
	# ethtool -K eth3 rxhash on
	Cannot change receive-hashing
	Could not change any device features

Fixes: 895586d5dc32 ("net: mvpp2: cls: Use RSS contexts to handle RSS tables")
Signed-off-by: Matteo Croce <mcroce@...hat.com>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 2b5dad2ec650..ba71583c7ae3 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -5423,7 +5423,8 @@ static int mvpp2_port_probe(struct platform_device *pdev,
 			    NETIF_F_HW_VLAN_CTAG_FILTER;
 
 	if (mvpp22_rss_is_supported()) {
-		dev->hw_features |= NETIF_F_RXHASH;
+		if (port->id == 0)
+			dev->hw_features |= NETIF_F_RXHASH;
 		dev->features |= NETIF_F_NTUPLE;
 	}
 
-- 
2.26.2