Message ID | 20231107174402.3590-1-klaus.kudielka@gmail.com |
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State | New |
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([2a02:168:6806:0:ed9a:eb86:e191:6603]) by smtp.gmail.com with ESMTPSA id bh7-20020a05600c3d0700b00401b242e2e6sm16608744wmb.47.2023.11.07.09.44.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Nov 2023 09:44:45 -0800 (PST) From: Klaus Kudielka <klaus.kudielka@gmail.com> To: Russell King <rmk+kernel@armlinux.org.uk>, Andrew Lunn <andrew@lunn.ch>, Heiner Kallweit <hkallweit1@gmail.com> Cc: "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Klaus Kudielka <klaus.kudielka@gmail.com>, stable@vger.kernel.org Subject: [PATCH net v2] net: phylink: initialize carrier state at creation Date: Tue, 7 Nov 2023 18:44:02 +0100 Message-ID: <20231107174402.3590-1-klaus.kudielka@gmail.com> X-Mailer: git-send-email 2.42.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (agentk.vger.email [0.0.0.0]); Tue, 07 Nov 2023 09:45:40 -0800 (PST) X-Spam-Status: No, score=-0.6 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on agentk.vger.email X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1781928248103885203 X-GMAIL-MSGID: 1781928248103885203 |
Series |
[net,v2] net: phylink: initialize carrier state at creation
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Commit Message
Klaus Kudielka
Nov. 7, 2023, 5:44 p.m. UTC
Background: Turris Omnia (Armada 385); eth2 (mvneta) connected to SFP bus; SFP module is present, but no fiber connected, so definitely no carrier. After booting, eth2 is down, but netdev LED trigger surprisingly reports link active. Then, after "ip link set eth2 up", the link indicator goes away - as I would have expected it from the beginning. It turns out, that the default carrier state after netdev creation is "carrier ok". Some ethernet drivers explicitly call netif_carrier_off during probing, others (like mvneta) don't - which explains the current behaviour: only when the device is brought up, phylink_start calls netif_carrier_off. Fix this for all drivers using phylink, by calling netif_carrier_off in phylink_create. Fixes: 089381b27abe ("leds: initial support for Turris Omnia LEDs") Cc: stable@vger.kernel.org Suggested-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Klaus Kudielka <klaus.kudielka@gmail.com> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> --- v2: clarified fixed drivers; added fixes tag & cc stable drivers/net/phy/phylink.c | 1 + 1 file changed, 1 insertion(+)
Comments
Hello: This patch was applied to netdev/net.git (main) by David S. Miller <davem@davemloft.net>: On Tue, 7 Nov 2023 18:44:02 +0100 you wrote: > Background: Turris Omnia (Armada 385); eth2 (mvneta) connected to SFP bus; > SFP module is present, but no fiber connected, so definitely no carrier. > > After booting, eth2 is down, but netdev LED trigger surprisingly reports > link active. Then, after "ip link set eth2 up", the link indicator goes > away - as I would have expected it from the beginning. > > [...] Here is the summary with links: - [net,v2] net: phylink: initialize carrier state at creation https://git.kernel.org/netdev/net/c/02d5fdbf4f2b You are awesome, thank you!
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 6712883498..a28da80bde 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -1616,6 +1616,7 @@ struct phylink *phylink_create(struct phylink_config *config, pl->config = config; if (config->type == PHYLINK_NETDEV) { pl->netdev = to_net_dev(config->dev); + netif_carrier_off(pl->netdev); } else if (config->type == PHYLINK_DEV) { pl->dev = config->dev; } else {