From patchwork Wed Apr 17 02:43:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Yang X-Patchwork-Id: 10904381 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 093A913B5 for ; Wed, 17 Apr 2019 02:42:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E5017287E9 for ; Wed, 17 Apr 2019 02:42:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D8646289F8; Wed, 17 Apr 2019 02:42:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 16D06287E9 for ; Wed, 17 Apr 2019 02:42:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731106AbfDQCma (ORCPT ); Tue, 16 Apr 2019 22:42:30 -0400 Received: from mxhk.zte.com.cn ([63.217.80.70]:5488 "EHLO mxhk.zte.com.cn" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728268AbfDQCma (ORCPT ); Tue, 16 Apr 2019 22:42:30 -0400 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id AB8367CE6013546EB907; Wed, 17 Apr 2019 10:42:28 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id x3H2gLOt060615; Wed, 17 Apr 2019 10:42:21 +0800 (GMT-8) (envelope-from wen.yang99@zte.com.cn) Received: from fox-host8.localdomain ([10.74.120.8]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2019041710424126-8909753 ; Wed, 17 Apr 2019 10:42:41 +0800 From: Wen Yang To: linux-kernel@vger.kernel.org Cc: wang.yi59@zte.com.cn, Wen Yang , Sebastian Reichel , linux-pm@vger.kernel.org Subject: [PATCH 2/2] power: supply: fix leaked of_node refs in power_supply_get_battery_info Date: Wed, 17 Apr 2019 10:43:03 +0800 Message-Id: <1555468983-34952-3-git-send-email-wen.yang99@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1555468983-34952-1-git-send-email-wen.yang99@zte.com.cn> References: <1555468983-34952-1-git-send-email-wen.yang99@zte.com.cn> X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2019-04-17 10:42:41, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2019-04-17 10:42:13, Serialize complete at 2019-04-17 10:42:13 X-MAIL: mse01.zte.com.cn x3H2gLOt060615 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The call to of_parse_phandle returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. Detected by coccinelle with the following warnings: ./drivers/power/supply/power_supply_core.c:601:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 595, but without a corresponding object release within this function. ./drivers/power/supply/power_supply_core.c:604:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 595, but without a corresponding object release within this function. ./drivers/power/supply/power_supply_core.c:632:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 595, but without a corresponding object release within this function. ./drivers/power/supply/power_supply_core.c:635:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 595, but without a corresponding object release within this function. ./drivers/power/supply/power_supply_core.c:653:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 595, but without a corresponding object release within this function. ./drivers/power/supply/power_supply_core.c:664:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 595, but without a corresponding object release within this function. ./drivers/power/supply/power_supply_core.c:673:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 595, but without a corresponding object release within this function. Signed-off-by: Wen Yang Cc: Sebastian Reichel Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- drivers/power/supply/power_supply_core.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c index 65c619c..874495c 100644 --- a/drivers/power/supply/power_supply_core.c +++ b/drivers/power/supply/power_supply_core.c @@ -598,10 +598,12 @@ int power_supply_get_battery_info(struct power_supply *psy, err = of_property_read_string(battery_np, "compatible", &value); if (err) - return err; + goto out_put_node; - if (strcmp("simple-battery", value)) - return -ENODEV; + if (strcmp("simple-battery", value)) { + err = -ENODEV; + goto out_put_node; + } /* The property and field names below must correspond to elements * in enum power_supply_property. For reasoning, see @@ -629,10 +631,12 @@ int power_supply_get_battery_info(struct power_supply *psy, len = of_property_count_u32_elems(battery_np, "ocv-capacity-celsius"); if (len < 0 && len != -EINVAL) { - return len; + err = len; + goto out_put_node; } else if (len > POWER_SUPPLY_OCV_TEMP_MAX) { dev_err(&psy->dev, "Too many temperature values\n"); - return -EINVAL; + err = -EINVAL; + goto out_put_node; } else if (len > 0) { of_property_read_u32_array(battery_np, "ocv-capacity-celsius", info->ocv_temp, len); @@ -650,7 +654,8 @@ int power_supply_get_battery_info(struct power_supply *psy, dev_err(&psy->dev, "failed to get %s\n", propname); kfree(propname); power_supply_put_battery_info(psy, info); - return -EINVAL; + err = -EINVAL; + goto out_put_node; } kfree(propname); @@ -661,7 +666,8 @@ int power_supply_get_battery_info(struct power_supply *psy, devm_kcalloc(&psy->dev, tab_len, sizeof(*table), GFP_KERNEL); if (!info->ocv_table[index]) { power_supply_put_battery_info(psy, info); - return -ENOMEM; + err = -ENOMEM; + goto out_put_node; } for (i = 0; i < tab_len; i++) { @@ -670,7 +676,9 @@ int power_supply_get_battery_info(struct power_supply *psy, } } - return 0; +out_put_node: + of_node_put(battery_np); + return err; } EXPORT_SYMBOL_GPL(power_supply_get_battery_info);