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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 C3CF5C4332B for ; Tue, 2 Mar 2021 02:49:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9C010614A7 for ; Tue, 2 Mar 2021 02:49:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379674AbhCBBa0 (ORCPT ); Mon, 1 Mar 2021 20:30:26 -0500 Received: from mail.kernel.org ([198.145.29.99]:43036 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241396AbhCATSO (ORCPT ); Mon, 1 Mar 2021 14:18:14 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 57682652E6; Mon, 1 Mar 2021 17:39:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614620386; bh=5zLvdUX5BbkNxDFM+dTSIEwWu7JX2ukVC1ho8jcw1fQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PFgrzsweavGwfCJecYSFRyaPolTl3Bkb00CXRUqbCvAZJwjcSbk4Ltr1C6uqomM9S eLF0gyF1nvG30RRvixJgsaP/SKE+75lJyoQmAK6mYi66dWTMqsyr2lYSEyCSoHcZ2C DxPxYFoK80iqSWH0O1J9DPcJ1c+rEPPaGJ2a+wsc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Claudiu Beznea , Heiner Kallweit , "David S. Miller" , Sasha Levin Subject: [PATCH 5.11 104/775] net: phy: consider that suspend2ram may cut off PHY power Date: Mon, 1 Mar 2021 17:04:32 +0100 Message-Id: <20210301161206.798967209@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161201.679371205@linuxfoundation.org> References: <20210301161201.679371205@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Heiner Kallweit [ Upstream commit 4c0d2e96ba055bd8911bb8287def4f8ebbad15b6 ] Claudiu reported that on his system S2R cuts off power to the PHY and after resuming certain PHY settings are lost. The PM folks confirmed that cutting off power to selected components in S2R is a valid case. Therefore resuming from S2R, same as from hibernation, has to assume that the PHY has power-on defaults. As a consequence use the restore callback also as resume callback. In addition make sure that the interrupt configuration is restored. Let's do this in phy_init_hw() and ensure that after this call actual interrupt configuration is in sync with phydev->interrupts. Currently, if interrupt was enabled before hibernation, we would resume with interrupt disabled because that's the power-on default. This fix applies cleanly only after the commit marked as fixed. I don't have an affected system, therefore change is compile-tested only. [0] https://lore.kernel.org/netdev/1610120754-14331-1-git-send-email-claudiu.beznea@microchip.com/ Fixes: 611d779af7ca ("net: phy: fix MDIO bus PM PHY resuming") Reported-by: Claudiu Beznea Signed-off-by: Heiner Kallweit Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/phy/phy_device.c | 53 ++++++++++++------------------------ 1 file changed, 17 insertions(+), 36 deletions(-) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 80c2e646c0934..71169e7d6177d 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -300,50 +300,22 @@ static int mdio_bus_phy_resume(struct device *dev) phydev->suspended_by_mdio_bus = 0; - ret = phy_resume(phydev); + ret = phy_init_hw(phydev); if (ret < 0) return ret; -no_resume: - if (phydev->attached_dev && phydev->adjust_link) - phy_start_machine(phydev); - - return 0; -} - -static int mdio_bus_phy_restore(struct device *dev) -{ - struct phy_device *phydev = to_phy_device(dev); - struct net_device *netdev = phydev->attached_dev; - int ret; - - if (!netdev) - return 0; - - ret = phy_init_hw(phydev); + ret = phy_resume(phydev); if (ret < 0) return ret; - +no_resume: if (phydev->attached_dev && phydev->adjust_link) phy_start_machine(phydev); return 0; } -static const struct dev_pm_ops mdio_bus_phy_pm_ops = { - .suspend = mdio_bus_phy_suspend, - .resume = mdio_bus_phy_resume, - .freeze = mdio_bus_phy_suspend, - .thaw = mdio_bus_phy_resume, - .restore = mdio_bus_phy_restore, -}; - -#define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops) - -#else - -#define MDIO_BUS_PHY_PM_OPS NULL - +static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend, + mdio_bus_phy_resume); #endif /* CONFIG_PM */ /** @@ -554,7 +526,7 @@ static const struct device_type mdio_bus_phy_type = { .name = "PHY", .groups = phy_dev_groups, .release = phy_device_release, - .pm = MDIO_BUS_PHY_PM_OPS, + .pm = pm_ptr(&mdio_bus_phy_pm_ops), }; static int phy_request_driver_module(struct phy_device *dev, u32 phy_id) @@ -1143,10 +1115,19 @@ int phy_init_hw(struct phy_device *phydev) if (ret < 0) return ret; - if (phydev->drv->config_init) + if (phydev->drv->config_init) { ret = phydev->drv->config_init(phydev); + if (ret < 0) + return ret; + } - return ret; + if (phydev->drv->config_intr) { + ret = phydev->drv->config_intr(phydev); + if (ret < 0) + return ret; + } + + return 0; } EXPORT_SYMBOL(phy_init_hw); -- 2.27.0