From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35982C7EE2F for ; Mon, 12 Jun 2023 15:10:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239375AbjFLPKi (ORCPT ); Mon, 12 Jun 2023 11:10:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41398 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239473AbjFLPKb (ORCPT ); Mon, 12 Jun 2023 11:10:31 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7B26E7E; Mon, 12 Jun 2023 08:10:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=RLt4Ovo0PWW3NIYW3PObHz9E3AAOntmn7Qz5jWIXCCA=; b=LBlqF6UZbcDwHw2r2XLulJfFfA m2W1nJNOt1W+bbtn/ExKSKkUGd5N6LWLJAEGlk0azfV/UCkKWCbdUodH6WKcuUrV/zEDMrubAI0ZD GxLIco6sPJ04xKfZK1GDZpLiaSSLwPx9mS+LOQRrlehGtauzjljORP/tRdNVleCXhgyxjL/ZeK4Tt oGTIw8yY+c03yyFydt7f9PtwQiDr7O/ZJ78JI8uMyU/12IAzuISbEvRzSJSF4YjPlG4RrNjRZiUFP 83CndD6rn1M7/qFEFDEg+pud7tRPHwnbIZVZ/g3fyUZuLCdjESDyXAAXcodYDdnG5dNWPV0rkPivQ RUCon3YQ==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:57192) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1q8jBZ-0005vZ-CT; Mon, 12 Jun 2023 16:10:25 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1q8jBY-00054x-OD; Mon, 12 Jun 2023 16:10:24 +0100 Date: Mon, 12 Jun 2023 16:10:24 +0100 From: "Russell King (Oracle)" To: Jianhui Zhao Cc: andrew@lunn.ch, davem@davemloft.net, edumazet@google.com, hkallweit1@gmail.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com Subject: Re: [PATCH] net: phy: Add sysfs attribute for PHY c45 identifiers. Message-ID: References: <20230611152743.2158-1-zhaojh329@gmail.com> <20230612140426.1648-1-zhaojh329@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: Russell King (Oracle) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 12, 2023 at 04:06:32PM +0100, Russell King (Oracle) wrote: > On Mon, Jun 12, 2023 at 10:04:26PM +0800, Jianhui Zhao wrote: > > diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c > > index 17d0d0555a79..81a4bc043ee2 100644 > > --- a/drivers/net/phy/phy_device.c > > +++ b/drivers/net/phy/phy_device.c > > @@ -541,8 +541,10 @@ static int phy_bus_match(struct device *dev, struct device_driver *drv) > > > > if ((phydrv->phy_id & phydrv->phy_id_mask) == > > (phydev->c45_ids.device_ids[i] & > > - phydrv->phy_id_mask)) > > + phydrv->phy_id_mask)) { > > + phydev->phy_id = phydev->c45_ids.device_ids[i]; > > return 1; > > + } > > } > > return 0; > > } else { > > > > How about modifying it like this? > > No - there are C45 PHYs where the ID in each MMD are different. 88x3310 > is one such example. If we're going to report any of them, we should > report all of them. The other issue is, this will remain as zero until a driver has successfully matched the device, which means as far as userspace knowing what type of PHY it is (to find a driver) this doesn't improve the situation. I don't think this is a very good solution. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!