From patchwork Sun Mar 25 12:49:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 890632 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bootlin.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 408HCX6hWnz9s0R for ; Sun, 25 Mar 2018 23:49:12 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752629AbeCYMtK (ORCPT ); Sun, 25 Mar 2018 08:49:10 -0400 Received: from mail.bootlin.com ([62.4.15.54]:52524 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752324AbeCYMtJ (ORCPT ); Sun, 25 Mar 2018 08:49:09 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id 467BB2083D; Sun, 25 Mar 2018 14:49:07 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.bootlin.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost.localdomain (91-160-177-164.subs.proxad.net [91.160.177.164]) by mail.bootlin.com (Postfix) with ESMTPSA id DF3D820808; Sun, 25 Mar 2018 14:49:06 +0200 (CEST) From: Boris Brezillon To: Wolfram Sang , linux-i2c@vger.kernel.org Cc: Boris Brezillon Subject: [PATCH v4 2/3] i2c: Retain info->of_node in i2c_new_device() Date: Sun, 25 Mar 2018 14:49:02 +0200 Message-Id: <20180325124903.2909-3-boris.brezillon@bootlin.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180325124903.2909-1-boris.brezillon@bootlin.com> References: <20180325124903.2909-1-boris.brezillon@bootlin.com> Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Currently, of_i2c_register_devices() is responsible for retaining info->of_node, but we're about to expose a function to parse I2C board info without registering the I2C device. We could possibly let this function retain ->of_node, but this approach is prone to reference leak since people will have to remember to call of_node_put() if something goes wrong between the OF node parsing and the registration step. Let's just retain the ->of_node in i2c_new_register() instead. Signed-off-by: Boris Brezillon --- Changes in v4: - patch added in v4 --- drivers/i2c/i2c-core-base.c | 6 ++++-- drivers/i2c/i2c-core-of.c | 3 +-- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 0d710eae5422..5227a3ceb659 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -742,7 +742,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info) client->dev.parent = &client->adapter->dev; client->dev.bus = &i2c_bus_type; client->dev.type = &i2c_client_type; - client->dev.of_node = info->of_node; + client->dev.of_node = of_node_get(info->of_node); client->dev.fwnode = info->fwnode; i2c_dev_set_name(adap, client, info); @@ -753,7 +753,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info) dev_err(&adap->dev, "Failed to add properties to client %s: %d\n", client->name, status); - goto out_err; + goto out_err_put_of_node; } } @@ -769,6 +769,8 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info) out_free_props: if (info->properties) device_remove_properties(&client->dev); +out_err_put_of_node: + of_node_put(info->of_node); out_err: dev_err(&adap->dev, "Failed to register i2c client %s at 0x%02x (%d)\n", diff --git a/drivers/i2c/i2c-core-of.c b/drivers/i2c/i2c-core-of.c index 15bd51eca37b..9fb38e99a6c6 100644 --- a/drivers/i2c/i2c-core-of.c +++ b/drivers/i2c/i2c-core-of.c @@ -55,7 +55,7 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap, } info.addr = addr; - info.of_node = of_node_get(node); + info.of_node = node; if (of_property_read_bool(node, "host-notify")) info.flags |= I2C_CLIENT_HOST_NOTIFY; @@ -66,7 +66,6 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap, client = i2c_new_device(adap, &info); if (!client) { dev_err(&adap->dev, "of_i2c: Failure registering %pOF\n", node); - of_node_put(node); return ERR_PTR(-EINVAL); } return client;