From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 A475F399CE9; Fri, 9 Oct 2026 14:24:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791555843; cv=none; b=BCYzH62JmDO4x70Wdcb8S2tiUyRXDpACMk560emBnuqUPijeji8BoV4/CjE3X/gwkOGuIRK5p9rEP1DB/VNDh5bfrmyBsNBY9HiuFU38UZXKbyZ9rMiwdvvaMga64Fpw2KoxtNGVWWys7hcjXyLVGdZqzE9+1fSUJagtnSv2RK8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791555843; c=relaxed/simple; bh=r6HVJslfGR/SAJ37mI+deStnXBoPMXxMV25qkws9ZW0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=X3/56oBMEzWntzMtqzJkjWRsVWR+drKMiEToSrGpH7eggDffxdb0DG40H/iZwBd1HZeKLaUE7hb0gKpel7c1/uITQQoJZkqSByjjS/upV6vgLqCu3Z1Cg2opcVsEuNEBo+z5LGIeVq1dFPLEh3aynx6h4Kfq+LoV+gQLwqsxQOg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WfbIa2Oo; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="WfbIa2Oo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 03BEC1F000FF; Fri, 9 Oct 2026 14:24:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1791555842; bh=oDYuUqqViovbI8icUFjYOgr+DMPd7pKzcG0BoiaaKPI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=WfbIa2OoHKzQ6gDhdk11a9+VXV91wVfmXN+6A+qxfA/WoUFo2ORRBZR9FXx6W0Xtv N81y/L1juk3p4ATgpP2n+jIY+eOhZHRbWB92M0A6sQJi5GK2OEDcpt8LGVONvnoxK5 5FE0cQdt5OWxIMzE2sgzaqqcSPCFjLtDAp7uTS/s= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Quentin Freimanis , Simon Horman , Daniel Machon , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.18 127/403] net: sparx5: make ports inherit the switch base mac address type Date: Fri, 9 Oct 2026 16:08:08 +0200 Message-ID: <20261009140955.047073923@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261009140952.119038291@linuxfoundation.org> References: <20261009140952.119038291@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Quentin Freimanis [ Upstream commit 5642b1648d5c4561d8ed7a410d0a7017f706604d ] When the switch uses a random base MAC address it does not mark each port's address as random: $ dmesg | grep "MAC addr" sparx5-switch e00c0000.switch: MAC addr was not set, use random MAC $ cat /sys/class/net/eth0/addr_assign_type 0 0 is NET_ADDR_PERM, so userspace thinks this is a stable address. With a random MAC reported as NET_ADDR_PERM, systemd's MACAddressPolicy=persistent [1] leaves it unchanged, so a DHCP client gets a new IP address every boot and a static reservation can't be used. Reporting it as NET_ADDR_RANDOM makes systemd replace it with a stable address derived from the interface name and machine-id. Fixes: f3cad2611a77 ("net: sparx5: add hostmode with phylink support") Signed-off-by: Quentin Freimanis Reviewed-by: Simon Horman Reviewed-by: Daniel Machon Link: https://patch.msgid.link/20260928045012.30178-1-quentin@q-lab.dev Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/microchip/sparx5/sparx5_main.c | 1 + drivers/net/ethernet/microchip/sparx5/sparx5_main.h | 1 + drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c | 1 + 3 files changed, 3 insertions(+) diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c index f201cb6c587a7..46837e7efbd07 100644 --- a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c @@ -896,6 +896,7 @@ static int mchp_sparx5_probe(struct platform_device *pdev) dev_info(sparx5->dev, "MAC addr was not set, use random MAC\n"); eth_random_addr(sparx5->base_mac); sparx5->base_mac[5] = 0; + sparx5->base_mac_assign_type = NET_ADDR_RANDOM; } sparx5->fdma_irq = platform_get_irq_byname(sparx5->pdev, "fdma"); diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.h b/drivers/net/ethernet/microchip/sparx5/sparx5_main.h index 97d53e229ad69..a5675f13a11e2 100644 --- a/drivers/net/ethernet/microchip/sparx5/sparx5_main.h +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.h @@ -392,6 +392,7 @@ struct sparx5 { struct notifier_block switchdev_blocking_nb; /* Switch state */ u8 base_mac[ETH_ALEN]; + u8 base_mac_assign_type; /* Associated bridge device (when bridged) */ struct net_device *hw_bridge_dev; /* Bridged interfaces */ diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c b/drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c index 1d34af78166a3..ae84ab7378823 100644 --- a/drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_netdev.c @@ -289,6 +289,7 @@ struct net_device *sparx5_create_netdev(struct sparx5 *sparx5, u32 portno) ndev->ethtool_ops = &sparx5_ethtool_ops; eth_hw_addr_gen(ndev, sparx5->base_mac, portno + 1); + ndev->addr_assign_type = sparx5->base_mac_assign_type; return ndev; } -- 2.53.0