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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 97918C433B4 for ; Tue, 6 Apr 2021 13:08:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6530C613B7 for ; Tue, 6 Apr 2021 13:08:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243495AbhDFNIg (ORCPT ); Tue, 6 Apr 2021 09:08:36 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:15924 "EHLO szxga06-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232492AbhDFNIf (ORCPT ); Tue, 6 Apr 2021 09:08:35 -0400 Received: from DGGEMS409-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4FF78C61kMzkhsC; Tue, 6 Apr 2021 21:06:35 +0800 (CST) Received: from huawei.com (10.175.103.91) by DGGEMS409-HUB.china.huawei.com (10.3.19.209) with Microsoft SMTP Server id 14.3.498.0; Tue, 6 Apr 2021 21:08:17 +0800 From: Yang Yingliang To: , CC: Subject: [PATCH -next] leds: tlc591xx: fix return value check in tlc591xx_probe() Date: Tue, 6 Apr 2021 21:11:59 +0800 Message-ID: <20210406131159.2136509-1-yangyingliang@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.103.91] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org After device_get_match_data(), tlc591xx is not checked, add check for it and also check np after dev_of_node. Reported-by: Hulk Robot Signed-off-by: Yang Yingliang --- drivers/leds/leds-tlc591xx.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/leds/leds-tlc591xx.c b/drivers/leds/leds-tlc591xx.c index 5b9dfdf743ec..cb7bd1353f9f 100644 --- a/drivers/leds/leds-tlc591xx.c +++ b/drivers/leds/leds-tlc591xx.c @@ -148,16 +148,20 @@ static int tlc591xx_probe(struct i2c_client *client, const struct i2c_device_id *id) { - struct device_node *np = dev_of_node(&client->dev), *child; + struct device_node *np, *child; struct device *dev = &client->dev; const struct tlc591xx *tlc591xx; struct tlc591xx_priv *priv; int err, count, reg; - tlc591xx = device_get_match_data(dev); + np = dev_of_node(dev); if (!np) return -ENODEV; + tlc591xx = device_get_match_data(dev); + if (!tlc591xx) + return -ENODEV; + count = of_get_available_child_count(np); if (!count || count > tlc591xx->max_leds) return -EINVAL; -- 2.25.1