From nobody Fri Apr 3 01:45:25 2026 Received: from e240-2.smtp-out.eu-north-1.amazonses.com (e240-2.smtp-out.eu-north-1.amazonses.com [23.251.240.2]) (using TLSv1.2 with cipher AES128-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7EB08302741; Wed, 18 Feb 2026 05:28:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=23.251.240.2 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771392506; cv=none; b=rTAlXhTkRUI+IXU9Ad+MOgXzmJ+5/hcdWjilM8W2B4eF2dFjrx7EuiqJvM7mSkrrzE6AbbjgLoHt8ExQifL8aJ/tQm0hNC4P10p3xoSD+LwZnWOZP/cq9ab8v8+Zqj6IdexBNtpK+yMSiLwj0JRM2AOfxYHXFLMUrK4moyFaoZI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771392506; c=relaxed/simple; bh=pYwAnMSFwzMSy5YViKb3RtaiuMhEnOHJimnRsrg7mDA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:To:Cc; b=J8jOKl3bjnUs4zD65PuAqN9stOeXNQQ4XR7IOhrDDpOI+1Xa1oSB5gFXZwTrFLzacLya8bjbuSNz/v96vuDjnl7b0JCcnbyNsM3y8zbSU5FyODuJRf5rM9rOJK4SbajY/y+Ia91bJMisS75aGkF1RmVZQ1WkFKDiF0iGqPAqiVQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=poleshift.se; spf=pass smtp.mailfrom=eu-north-1.amazonses.com; dkim=pass (2048-bit key) header.d=poleshift.se header.i=@poleshift.se header.b=b0o1Qo1g; dkim=pass (1024-bit key) header.d=amazonses.com header.i=@amazonses.com header.b=BIWUcywv; dkim=fail (0-bit key) header.d=poleshift.se header.i=@poleshift.se header.b=hpW+Y4GI reason="key not found in DNS"; arc=none smtp.client-ip=23.251.240.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=poleshift.se Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=eu-north-1.amazonses.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=poleshift.se header.i=@poleshift.se header.b="b0o1Qo1g"; dkim=pass (1024-bit key) header.d=amazonses.com header.i=@amazonses.com header.b="BIWUcywv"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=poleshift.se header.i=@poleshift.se header.b="hpW+Y4GI" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=n6aiayff3zq3manwyovyvpolm4pou2ef; d=poleshift.se; t=1771392502; h=From:Date:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:To:Cc; bh=pYwAnMSFwzMSy5YViKb3RtaiuMhEnOHJimnRsrg7mDA=; b=b0o1Qo1g9NcqcT3do2js4UvNScuqY8nLbcgeNwypT0obcRNbqQWknmpCcGKHWMwt yLxJiME4ppaI1QU7Fgl6Ry1Nr+krWehCBQxFE8e8bMsog9/99HEdDloaOMu/5Z2LhOd fA0yjMPQJSbiTPNHhMw4dLvw/59jnCs4DuPEEFl1JPo7XE2c4WDzMnBptBUFBrQW4Jn 3OnfQ+iDpeP/S1+IsQpaxCfBhcUG8w/Iwm5atkI23kAw85YTYcck1WuBhgkyEOgTqJU TG1ufhMb77HdX0jypEYcWPDY2kbTy381cxWxswtQhHFdOgBIWQ45fstWS6ZOqtmUawt NDQ2cH5gEQ== DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=icdr7g7fbtu2nwxgaimytihkt42k3kiy; d=amazonses.com; t=1771392502; h=From:Date:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:To:Cc:Feedback-ID; bh=pYwAnMSFwzMSy5YViKb3RtaiuMhEnOHJimnRsrg7mDA=; b=BIWUcywvzyLwNZ2gpMk7noLH6HVzCamt9YqoLU2yi4zOZSx422In+nZqpDFVSIdK PVxyFIEN7FdyfAo+vf6TWrZSeemrrMuYBEAhVHIEsoPLenI0Uyz6nXvN9yDtcArucAa molJaytKPB5Xl1MHRyYQW3ZNib/Bi0RI8mt+RwmU= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=poleshift.se; s=20230429; t=1771392500; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=F/pKx2TLXuF3OwfKFAD9ATqLuWyO3+40ljoC9QdG8KU=; b=hpW+Y4GIlSJ1Gdu2xX9JjdsDPI0yVCistgHBQhelJ2Td+OahdM6cOZ6gVXDtb7He7GeLxc 520Y2nmTSNVtEuuhv0+pgSTENvhv3lXh2QBSgibRmOPE7ljpXs41i9x4oUnvfDB1o7YPWd ipNsFtTH15Z/CISZ5U9n/LmRS9n9RBo= From: =?utf-8?q?Martin_P=C3=A5lsson?= Date: Wed, 18 Feb 2026 05:28:22 +0000 Subject: [PATCH v3] net: usb: lan78xx: scan all MDIO addresses on LAN7801 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID: <0110019c6f388aff-98d99cf0-4425-4fff-b16b-dea5ad8fafe0-000000@eu-north-1.amazonses.com> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/4XNQQ6CMBAF0KuQWTumLaWgK+9hXFQ62EYE0pIGQ ri7hZUxMS7/n/w3CwTyjgKcswU8RRdc36WQHzKore4ehM6kDIIJxQSX2OqurKYJBzvjS4cnNm5 CLdPVEC+0rCFNB0+p3tnrLWXrwtj7ef8S+db+ASNHjvlda85YpTjJy9C3FKxrxmMg2MwoPh31w xHJUXQqqTiRMbL8ctZ1fQOjnhBhAwEAAA== X-Change-ID: 20260214-lan78xx-phy-mask-fix-a4260de15a4c To: Thangaraj Samynathan , Rengarajan Sundararajan , UNGLinuxDriver@microchip.com, Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Woojung Huh Cc: netdev@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Martin_P=C3=A5lsson?= X-Mailer: b4 0.14.3 Feedback-ID: ::1.eu-north-1.nVsitYrO9p3qnPLcZXP017jV0c/PN62ZbS4lYSSQpnA=:AmazonSES X-SES-Outgoing: 2026.02.18-23.251.240.2 The LAN7801 is designed exclusively for external PHYs (unlike the LAN7800/LAN7850 which have internal PHYs), but lan78xx_mdio_init() restricts PHY scanning to MDIO addresses 0-7 by setting phy_mask to ~(0xFF). This prevents discovery of external PHYs wired to addresses outside that range. One such case is the DP83TC814 100BASE-T1 PHY, which is typically configured at MDIO address 10 via PHYAD bootstrap pins and goes undetected with the current mask. Remove the restrictive phy_mask assignment for the LAN7801 so that the default mask of 0 applies, allowing all 32 MDIO addresses to be scanned during bus registration. Fixes: 02dc1f3d613d ("lan78xx: add LAN7801 MAC only support") Signed-off-by: Martin P=C3=A5lsson --- Changes in v3: - Removed restrictive phy_mask assignment and comment, relying on the default mask of 0 to scan all 32 MDIO addresses (Maxime Chevallier) - Link to v2: https://lore.kernel.org/r/20260216-lan78xx-phy-mask-fix-v2-1-= 6e97e59edd47@poleshift.se Changes in v2: - Added Fixes: tag - Link to v1: https://lore.kernel.org/r/20260214-lan78xx-phy-mask-fix-v1-1-= 3baa100861e4@poleshift.se --- drivers/net/usb/lan78xx.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index 00397a807393..065588c9cfa6 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -2094,8 +2094,6 @@ static int lan78xx_mdio_init(struct lan78xx_net *dev) dev->mdiobus->phy_mask =3D ~(1 << 1); break; case ID_REV_CHIP_ID_7801_: - /* scan thru PHYAD[2..0] */ - dev->mdiobus->phy_mask =3D ~(0xFF); break; } =20 --- base-commit: ee5492fd88cfc079c19fbeac78e9e53b7f6c04f3 change-id: 20260214-lan78xx-phy-mask-fix-a4260de15a4c Best regards, --=20 Martin P=C3=A5lsson