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 45160C7618A for ; Mon, 20 Mar 2023 15:08:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232199AbjCTPIl (ORCPT ); Mon, 20 Mar 2023 11:08:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35006 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232211AbjCTPIS (ORCPT ); Mon, 20 Mar 2023 11:08:18 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA48725969 for ; Mon, 20 Mar 2023 08:03:43 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 35665B80EC1 for ; Mon, 20 Mar 2023 15:03:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D19FC433D2; Mon, 20 Mar 2023 15:03:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1679324590; bh=PttVWRAt9WKglCvCl6DcBmILKk/qvRmCBwv3pzOYrqo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vnunlrm1tt2P2nSq3nbbw+X28CAGyzK3PqqWkwzQgcwF5cQYuppFtdwm2n7A0GuQN OeERKriCIFiA3n52s0LDh81ryXoNY8axJCHwbKm9Ai/k0YkjTsfA8ebm91D/mJX67c QrsYAMYyGIyRh36x1azIPdU8WWCF6DfPIRMLZfeY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Heiner Kallweit , Simon Horman , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.10 22/99] net: phy: smsc: bail out in lan87xx_read_status if genphy_read_status fails Date: Mon, 20 Mar 2023 15:54:00 +0100 Message-Id: <20230320145444.314211438@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230320145443.333824603@linuxfoundation.org> References: <20230320145443.333824603@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Heiner Kallweit [ Upstream commit c22c3bbf351e4ce905f082649cffa1ff893ea8c1 ] If genphy_read_status fails then further access to the PHY may result in unpredictable behavior. To prevent this bail out immediately if genphy_read_status fails. Fixes: 4223dbffed9f ("net: phy: smsc: Re-enable EDPD mode for LAN87xx") Signed-off-by: Heiner Kallweit Reviewed-by: Simon Horman Link: https://lore.kernel.org/r/026aa4f2-36f5-1c10-ab9f-cdb17dda6ac4@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/phy/smsc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c index caf7291ffaf83..b67de3f9ef186 100644 --- a/drivers/net/phy/smsc.c +++ b/drivers/net/phy/smsc.c @@ -181,8 +181,11 @@ static int lan95xx_config_aneg_ext(struct phy_device *phydev) static int lan87xx_read_status(struct phy_device *phydev) { struct smsc_phy_priv *priv = phydev->priv; + int err; - int err = genphy_read_status(phydev); + err = genphy_read_status(phydev); + if (err) + return err; if (!phydev->link && priv->energy_enable) { /* Disable EDPD to wake up PHY */ -- 2.39.2