From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4454C43CEDD for ; Wed, 1 Jul 2026 11:04:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782903888; cv=none; b=nijf5qSt1btUzTP0VByI6k8p96rjM0R8sdV3TbUatZwN/DFag0uu+19+br427WZvtk5t9i4DvsTstgKSULEbJu/luzA3ve7UltRkrn0EtpwHrdwHwnwNzCBpiZzHDULEpEXGfJkPIgfhheW7VGpPFn6DqDXzLkbW38oylk7qXDc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782903888; c=relaxed/simple; bh=xKIJHq8ejqOxbfibzqJN5M463TN844802sdnQ77oeLI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gy+slAmeYaYX/jgJLvodPbsU5uHB5hXC8xNhinbGPNxLcB2hUgJEeEvYKWnWnRap0/kpposEZ8BCwSbzt1g3tkkk61/oZ1K/S6AgqTSQA1gY/6EgnIlE2q8VFk3kieRK+RDuybjZs05rskyQh8uP/M8ZLOEbh6c4JPvZvzu/JAA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=VjnmwnKX; arc=none smtp.client-ip=185.246.84.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="VjnmwnKX" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 3D2C71A0DB2; Wed, 1 Jul 2026 11:04:42 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 104A260288; Wed, 1 Jul 2026 11:04:42 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 861E9104C9E12; Wed, 1 Jul 2026 13:04:38 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1782903880; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=aBVMFEq9E51//oOVWPwZ+C/7bd7DeVhNxjeNdpSWCdo=; b=VjnmwnKX8zwnUVWjGP/52KQdWDq5hxoDrbbsufIyILwuK9VJCz9Zv4HnvhFLz06PFJA2RE Ch+WqPGv08o9Z9atnSzvvFfM6aJVc1eUyx2KUJhNhdFTWHJUFYYksTR5lq6/OQYla8DqoY xZzgULtc0NhX6ByuVxgRhOA2r9/C22/KYn5QaVVIcKE+0h2oPOzWW1JZ0b1qLbHHSNYFnf VCd/eU0CW29EcyM3H0FgJxIY+iLpBqU+C1KHj3nBDdqYsOZevk87D8PdItToevSYxm2k2+ thEJDvtVLZAW69SNijQOWOOox1qDsZofhndiegAcn/vcfY40ppDGbDwdqXBMnQ== From: Maxime Chevallier To: davem@davemloft.net, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , Heiner Kallweit Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Christophe Leroy , Herve Codina , Florian Fainelli , Vladimir Oltean , =?UTF-8?q?K=C3=B6ry=20Maincent?= , =?UTF-8?q?Marek=20Beh=C3=BAn?= , Oleksij Rempel , =?UTF-8?q?Nicol=C3=B2=20Veronese?= , Simon Horman , mwojtas@chromium.org, Romain Gantois , Daniel Golle , Dimitri Fedrau , Frank Wunderlich Subject: [PATCH net-next v13 01/10] net: phy: phy_link_topology: Add a helper for opportunistic alloc Date: Wed, 1 Jul 2026 13:04:17 +0200 Message-ID: <20260701110427.143945-2-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260701110427.143945-1-maxime.chevallier@bootlin.com> References: <20260701110427.143945-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 The phy_link_topology structure stores information about the PHY-related components connected to a net_device. It is opportunistically allocated, when we add the first item to the topology, as this is not relevant for all kinds of net_devices. In preparation for the addition of phy_port tracking in the topology, let's make a dedicated helper for that allocation sequence. Reviewed-by: Andrew Lunn Signed-off-by: Maxime Chevallier --- drivers/net/phy/phy_link_topology.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) diff --git a/drivers/net/phy/phy_link_topology.c b/drivers/net/phy/phy_link_topology.c index 4134de7ae313..99f1842afcbd 100644 --- a/drivers/net/phy/phy_link_topology.c +++ b/drivers/net/phy/phy_link_topology.c @@ -28,11 +28,28 @@ static int netdev_alloc_phy_link_topology(struct net_device *dev) return 0; } +static struct phy_link_topology *phy_link_topo_get_or_alloc(struct net_device *dev) +{ + int ret; + + if (dev->link_topo) + return dev->link_topo; + + /* The topology is allocated the first time we add an object to it. + * It is freed alongside the netdev. + */ + ret = netdev_alloc_phy_link_topology(dev); + if (ret) + return ERR_PTR(ret); + + return dev->link_topo; +} + int phy_link_topo_add_phy(struct net_device *dev, struct phy_device *phy, enum phy_upstream upt, void *upstream) { - struct phy_link_topology *topo = dev->link_topo; + struct phy_link_topology *topo; struct phy_device_node *pdn; int ret; @@ -45,13 +62,9 @@ int phy_link_topo_add_phy(struct net_device *dev, if (WARN_ON_ONCE(netdev_need_ops_lock(dev))) return -EOPNOTSUPP; - if (!topo) { - ret = netdev_alloc_phy_link_topology(dev); - if (ret) - return ret; - - topo = dev->link_topo; - } + topo = phy_link_topo_get_or_alloc(dev); + if (IS_ERR(topo)) + return PTR_ERR(topo); pdn = kzalloc_obj(*pdn); if (!pdn) -- 2.54.0