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 X-Spam-Level: X-Spam-Status: No, score=-8.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1247CA90AF for ; Wed, 13 May 2020 13:06:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9BBE620673 for ; Wed, 13 May 2020 13:06:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="GbyxsXPv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729598AbgEMNGQ (ORCPT ); Wed, 13 May 2020 09:06:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725967AbgEMNGQ (ORCPT ); Wed, 13 May 2020 09:06:16 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:3201:214:fdff:fe10:1be6]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 73D2FC061A0C; Wed, 13 May 2020 06:06:15 -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=XRZP4coENPaEASSZzra9te94FAUGfjbaaParyYkAyXQ=; b=GbyxsXPvGLFQdWaSkIykDFNq+ AOCEtd+CfIfUyXZojobQ0zAcq/Kll3RZTqtp0oiYwJF8ZmnBjEQ2XfZC6PqXOoioyPa9b/1uTqAge Yey49kjiUtD/0lpqpUc2yL+WFGKeJGhhIFQ1CPFBWj+lh/POB2uDKbGvsz3Y1qWn8PE/mGFgAcDxN +WAsh4Hpd+hvANtZ4QTGyGVL/Y/Gv0BYwTtMXDP9NOdQwYTt3kIHYOem1w1LTtRamfiGkH9Uf/wAm En2KUP9S4+fBwIkmGze60p24+YjDZg5HqSizJ34a7jcVxavGywWXBPzQrhR9bTLG1E7OzTCA6aNMi 3EgpnDaGQ==; Received: from shell.armlinux.org.uk ([2002:4e20:1eda:1:5054:ff:fe00:4ec]:57492) by pandora.armlinux.org.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jYr54-0004ZU-SY; Wed, 13 May 2020 14:05:51 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1jYr4q-0007nH-QV; Wed, 13 May 2020 14:05:36 +0100 Date: Wed, 13 May 2020 14:05:36 +0100 From: Russell King - ARM Linux admin To: nicolas.ferre@microchip.com Cc: linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, Claudiu Beznea , harini.katakam@xilinx.com, Alexandre Belloni , f.fainelli@gmail.com, antoine.tenart@bootlin.com, linux-kernel@vger.kernel.org, "David S. Miller" Subject: Re: [PATCH v4 3/5] net: macb: fix macb_get/set_wol() when moving to phylink Message-ID: <20200513130536.GI1551@shell.armlinux.org.uk> References: <4aeebe901fde6db70a5ca12b10e793dd2ee6ce60.1588763703.git.nicolas.ferre@microchip.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4aeebe901fde6db70a5ca12b10e793dd2ee6ce60.1588763703.git.nicolas.ferre@microchip.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 06, 2020 at 01:37:39PM +0200, nicolas.ferre@microchip.com wrote: > From: Nicolas Ferre > > Keep previous function goals and integrate phylink actions to them. > > phylink_ethtool_get_wol() is not enough to figure out if Ethernet driver > supports Wake-on-Lan. > Initialization of "supported" and "wolopts" members is done in phylink > function, no need to keep them in calling function. > > phylink_ethtool_set_wol() return value is not enough to determine > if WoL is enabled for the calling Ethernet driver. Call it first > but don't rely on its return value as most of simple PHY drivers > don't implement a set_wol() function. > > Fixes: 7897b071ac3b ("net: macb: convert to phylink") > Signed-off-by: Nicolas Ferre > Reviewed-by: Florian Fainelli > Cc: Claudiu Beznea > Cc: Harini Katakam > Cc: Antoine Tenart > --- > drivers/net/ethernet/cadence/macb_main.c | 18 ++++++++++-------- > 1 file changed, 10 insertions(+), 8 deletions(-) > > diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c > index 53e81ab048ae..24c044dc7fa0 100644 > --- a/drivers/net/ethernet/cadence/macb_main.c > +++ b/drivers/net/ethernet/cadence/macb_main.c > @@ -2817,21 +2817,23 @@ static void macb_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol) > { > struct macb *bp = netdev_priv(netdev); > > - wol->supported = 0; > - wol->wolopts = 0; > - > - if (bp->wol & MACB_WOL_HAS_MAGIC_PACKET) > + if (bp->wol & MACB_WOL_HAS_MAGIC_PACKET) { > phylink_ethtool_get_wol(bp->phylink, wol); > + wol->supported |= WAKE_MAGIC; > + > + if (bp->wol & MACB_WOL_ENABLED) > + wol->wolopts |= WAKE_MAGIC; > + } > } > > static int macb_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol) > { > struct macb *bp = netdev_priv(netdev); > - int ret; > > - ret = phylink_ethtool_set_wol(bp->phylink, wol); > - if (!ret) > - return 0; > + /* Pass the order to phylink layer. > + * Don't test return value as set_wol() is often not supported. > + */ > + phylink_ethtool_set_wol(bp->phylink, wol); If this returns an error, does that mean WOL works or does it not? Note that if set_wol() is not supported, this will return -EOPNOTSUPP. What about other errors? If you want to just ignore the case where it's not supported, then this looks like a sledge hammer to crack a nut. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up