netdev - [PATCH v2 net-next 04/12] net: ethtool: fix __ethtool_dev_mm

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Date:   Sun, 19 Feb 2023 15:53:00 +0200
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Vinicius Costa Gomes <vinicius.gomes@...el.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Gerhard Engleder <gerhard@...leder-embedded.com>,
        Amritha Nambiar <amritha.nambiar@...el.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ferenc Fejes <ferenc.fejes@...csson.com>,
        Xiaoliang Yang <xiaoliang.yang_1@....com>,
        Roger Quadros <rogerq@...nel.org>,
        Pranavi Somisetty <pranavi.somisetty@....com>,
        Harini Katakam <harini.katakam@....com>,
        linux-kernel@...r.kernel.org,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Wong Vee Khee <vee.khee.wong@...ux.intel.com>,
        Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>,
        Jacob Keller <jacob.e.keller@...el.com>
Subject: [PATCH v2 net-next 04/12] net: ethtool: fix __ethtool_dev_mm_supported() implementation

The MAC Merge layer is supported when ops->get_mm() returns 0.
The implementation was changed during review, and in this process, a bug
was introduced.

Link: https://patchwork.kernel.org/project/netdevbpf/patch/20230111161706.1465242-5-vladimir.oltean@nxp.com/
Fixes: 04692c9020b7 ("net: ethtool: netlink: retrieve stats from multiple sources (eMAC, pMAC)")
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
v1->v2: none

 net/ethtool/mm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ethtool/mm.c b/net/ethtool/mm.c
index e612856eed8c..fce3cc2734f9 100644
--- a/net/ethtool/mm.c
+++ b/net/ethtool/mm.c
@@ -247,5 +247,5 @@ bool __ethtool_dev_mm_supported(struct net_device *dev)
 	if (ops && ops->get_mm)
 		ret = ops->get_mm(dev, &state);
 
-	return !!ret;
+	return !ret;
 }
-- 
2.34.1