From patchwork Fri May 8 12:32:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 226106 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 05546C38A2A for ; Fri, 8 May 2020 13:19:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CA46424954 for ; Fri, 8 May 2020 13:19:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588943956; bh=By2JmhjE01mA3fKG5s6nmrpHeVl/zfw3Km+eUHLMTpE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=X7sdcWPjaXSpxRLjBdlh+hN3MNeuu9WiE7oBFDWo4bhrz3t9wKHDIQEe3z3kZ+0Fl s6xENObQYyxvnVYZp1c1LAueVlQaI9QGxW7Tz8gg26gU4c6ImloQzwYiKsYCznMqQs jSmGvHcVqIbC5Lc3Vb79xor5db2rFD7R7Lw9BeN0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728180AbgEHNTL (ORCPT ); Fri, 8 May 2020 09:19:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:39538 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728946AbgEHMm3 (ORCPT ); Fri, 8 May 2020 08:42:29 -0400 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 487812495F; Fri, 8 May 2020 12:42:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588941748; bh=By2JmhjE01mA3fKG5s6nmrpHeVl/zfw3Km+eUHLMTpE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ctn9SJ/i+z25REoVUT6axUReKT9YwlpNEzgvzHK38DD5/7Oew10GyEu+1HOjFONri a0X8OPlewohehGF6Cp+n9svQZ5Qr9vYLbSu5S+zoICTSWVII42eudHcvhj6yWcHkkN 5wJUxIdsrzXnKrUf38asjfoh2S3bBVBu/oAaaPpY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold , "David S. Miller" Subject: [PATCH 4.4 157/312] net: dsa: slave: fix of-node leak and phy priority Date: Fri, 8 May 2020 14:32:28 +0200 Message-Id: <20200508123135.498900615@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200508123124.574959822@linuxfoundation.org> References: <20200508123124.574959822@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: Johan Hovold commit 0d8f3c67151faaa80e332c254372dca58fb2a9d4 upstream. Make sure to drop the reference taken by of_parse_phandle() before returning from dsa_slave_phy_setup(). Note that this also modifies the PHY priority so that any fixed-link node is only parsed when no phy-handle is given, which is in accordance with the common scheme for this. Fixes: 0d8bcdd383b8 ("net: dsa: allow for more complex PHY setups") Signed-off-by: Johan Hovold Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/dsa/slave.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -1031,7 +1031,7 @@ static int dsa_slave_phy_setup(struct ds p->phy_interface = mode; phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); - if (of_phy_is_fixed_link(port_dn)) { + if (!phy_dn && of_phy_is_fixed_link(port_dn)) { /* In the case of a fixed PHY, the DT node associated * to the fixed PHY is the Port DT node */ @@ -1041,7 +1041,7 @@ static int dsa_slave_phy_setup(struct ds return ret; } phy_is_fixed = true; - phy_dn = port_dn; + phy_dn = of_node_get(port_dn); } if (ds->drv->get_phy_flags) @@ -1060,6 +1060,7 @@ static int dsa_slave_phy_setup(struct ds ret = dsa_slave_phy_connect(p, slave_dev, phy_id); if (ret) { netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); + of_node_put(phy_dn); return ret; } } else { @@ -1068,6 +1069,8 @@ static int dsa_slave_phy_setup(struct ds phy_flags, p->phy_interface); } + + of_node_put(phy_dn); } if (p->phy && phy_is_fixed)