From patchwork Thu Jan 2 22:07:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 234657 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 D4CE8C3276C for ; Thu, 2 Jan 2020 22:41:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9D96721835 for ; Thu, 2 Jan 2020 22:41:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004902; bh=V/gy+YkzeOgdnynA/ZcHtlCiX4G0to+VmVLRwR3TjFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=nrbgFGlj5w5v3jOK45P3ERQ1SrQeV07kF34Cv9iEtI03C3XUGmNe6tiYqB2t1V19C AndiVK5nXYPoB8hFWkPhOqzJk2ExnZAXT+5BhNxxakvkH3xTL/SHQ1lgKdPhHJq7Vs RDn9BG8QfLU5C4O+iv83XcxMXNK6GF3ASWDi/ZYc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731010AbgABWgx (ORCPT ); Thu, 2 Jan 2020 17:36:53 -0500 Received: from mail.kernel.org ([198.145.29.99]:48556 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730833AbgABWgw (ORCPT ); Thu, 2 Jan 2020 17:36:52 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BA45320866; Thu, 2 Jan 2020 22:36:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004612; bh=V/gy+YkzeOgdnynA/ZcHtlCiX4G0to+VmVLRwR3TjFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S2PL7D5IzOpx3UFaijPYu692pUbf2tuj4A32frhvOZfWVylHBk1AleOK67n2UbE+K cAHpa62tD5MTfRa95Dq/VPQfybrTYoFDjuybf7jegyw1F0SwWGlMP7WvPHYXZleXFy VQO9W2c6O/mL2ZWDC50hzUZaVUbGNEWNHBC6y0ak= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Cristian Birsan , "David S. Miller" Subject: [PATCH 4.4 079/137] net: usb: lan78xx: Fix suspend/resume PHY register access error Date: Thu, 2 Jan 2020 23:07:32 +0100 Message-Id: <20200102220557.332025042@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102220546.618583146@linuxfoundation.org> References: <20200102220546.618583146@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Cristian Birsan [ Upstream commit 20032b63586ac6c28c936dff696981159913a13f ] Lan78xx driver accesses the PHY registers through MDIO bus over USB connection. When performing a suspend/resume, the PHY registers can be accessed before the USB connection is resumed. This will generate an error and will prevent the device to resume correctly. This patch adds the dependency between the MDIO bus and USB device to allow correct handling of suspend/resume. Fixes: ce85e13ad6ef ("lan78xx: Update to use phylib instead of mii_if_info.") Signed-off-by: Cristian Birsan Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/usb/lan78xx.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -1448,6 +1448,7 @@ static int lan78xx_mdio_init(struct lan7 dev->mdiobus->read = lan78xx_mdiobus_read; dev->mdiobus->write = lan78xx_mdiobus_write; dev->mdiobus->name = "lan78xx-mdiobus"; + dev->mdiobus->parent = &dev->udev->dev; snprintf(dev->mdiobus->id, MII_BUS_ID_SIZE, "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);