From patchwork Tue Aug 10 17:29:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 495899 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=-19.5 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=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 69FE9C4320E for ; Tue, 10 Aug 2021 17:35:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50CDD610FD for ; Tue, 10 Aug 2021 17:35:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232600AbhHJRf1 (ORCPT ); Tue, 10 Aug 2021 13:35:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:41904 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232584AbhHJRej (ORCPT ); Tue, 10 Aug 2021 13:34:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8CB9461078; Tue, 10 Aug 2021 17:34:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1628616857; bh=Oq6Tn8AMwPFrn9rdR4cmYwhYNnHNHc2+CLpJyFxMcGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S7sZk2+YqQfTOohASnLVdeoe0jXfo03z9dzg1d+rapkcvCL5HgUPugehcOuW3GV8l huPNJDutPNWP3svj5SEAGImQzndRm5VdW81eh0neKw8Z1aY+m7u3kXtgaHg/Fp9xqW bd5Ku4lx/oyLeAUHvQGHZoZShJBRTGl2KxDl+W3c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Steve Bennett , Marek Vasut , "David S. Miller" , Sasha Levin Subject: [PATCH 5.4 23/85] net: phy: micrel: Fix detection of ksz87xx switch Date: Tue, 10 Aug 2021 19:29:56 +0200 Message-Id: <20210810172948.976470286@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210810172948.192298392@linuxfoundation.org> References: <20210810172948.192298392@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Steve Bennett [ Upstream commit a5e63c7d38d548b8dab6c6205e0b6af76899dbf5 ] The logic for discerning between KSZ8051 and KSZ87XX PHYs is incorrect such that the that KSZ87XX switch is not identified correctly. ksz8051_ksz8795_match_phy_device() uses the parameter ksz_phy_id to discriminate whether it was called from ksz8051_match_phy_device() or from ksz8795_match_phy_device() but since PHY_ID_KSZ87XX is the same value as PHY_ID_KSZ8051, this doesn't work. Instead use a bool to discriminate the caller. Without this patch, the KSZ8795 switch port identifies as: ksz8795-switch spi3.1 ade1 (uninitialized): PHY [dsa-0.1:03] driver [Generic PHY] With the patch, it identifies correctly: ksz8795-switch spi3.1 ade1 (uninitialized): PHY [dsa-0.1:03] driver [Micrel KSZ87XX Switch] Fixes: 8b95599c55ed24b36cf4 ("net: phy: micrel: Discern KSZ8051 and KSZ8795 PHYs") Signed-off-by: Steve Bennett Reviewed-by: Marek Vasut Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/phy/micrel.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index 663c68ed6ef9..910ab2182158 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -343,11 +343,11 @@ static int ksz8041_config_aneg(struct phy_device *phydev) } static int ksz8051_ksz8795_match_phy_device(struct phy_device *phydev, - const u32 ksz_phy_id) + const bool ksz_8051) { int ret; - if ((phydev->phy_id & MICREL_PHY_ID_MASK) != ksz_phy_id) + if ((phydev->phy_id & MICREL_PHY_ID_MASK) != PHY_ID_KSZ8051) return 0; ret = phy_read(phydev, MII_BMSR); @@ -360,7 +360,7 @@ static int ksz8051_ksz8795_match_phy_device(struct phy_device *phydev, * the switch does not. */ ret &= BMSR_ERCAP; - if (ksz_phy_id == PHY_ID_KSZ8051) + if (ksz_8051) return ret; else return !ret; @@ -368,7 +368,7 @@ static int ksz8051_ksz8795_match_phy_device(struct phy_device *phydev, static int ksz8051_match_phy_device(struct phy_device *phydev) { - return ksz8051_ksz8795_match_phy_device(phydev, PHY_ID_KSZ8051); + return ksz8051_ksz8795_match_phy_device(phydev, true); } static int ksz8081_config_init(struct phy_device *phydev) @@ -396,7 +396,7 @@ static int ksz8061_config_init(struct phy_device *phydev) static int ksz8795_match_phy_device(struct phy_device *phydev) { - return ksz8051_ksz8795_match_phy_device(phydev, PHY_ID_KSZ87XX); + return ksz8051_ksz8795_match_phy_device(phydev, false); } static int ksz9021_load_values_from_of(struct phy_device *phydev,