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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 19525C2B9F7 for ; Mon, 24 May 2021 15:33:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0056961400 for ; Mon, 24 May 2021 15:33:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233290AbhEXPfH (ORCPT ); Mon, 24 May 2021 11:35:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:51356 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233072AbhEXPdc (ORCPT ); Mon, 24 May 2021 11:33:32 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E635A613E6; Mon, 24 May 2021 15:31:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621870271; bh=y8tKCc8MNmhJbgdeqlnUMymJi7u75jq1rEAUQ5u/ucY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rE8ujamSOUHnwwtx6VhmnpCC3O3m1Ax8c1nZjNfI96TOL0uNS+BwCcFpt3wanxybc NHyAlc2UC4kx6ZMJyivYTBI+hkQ18CQ86O/NX2X8W7y1fAO3kOyFl42vvpGJgPlM8p 65y/AkvqWvw2rqzGVWwO5YDi3cr90/I5AFCmg2oU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jacek Anaszewski , Phillip Potter Subject: [PATCH 4.4 26/31] leds: lp5523: check return value of lp5xx_read and jump to cleanup code Date: Mon, 24 May 2021 17:25:09 +0200 Message-Id: <20210524152323.771512900@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210524152322.919918360@linuxfoundation.org> References: <20210524152322.919918360@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Phillip Potter commit 6647f7a06eb030a2384ec71f0bb2e78854afabfe upstream. Check return value of lp5xx_read and if non-zero, jump to code at end of the function, causing lp5523_stop_all_engines to be executed before returning the error value up the call chain. This fixes the original commit (248b57015f35) which was reverted due to the University of Minnesota problems. Cc: stable Acked-by: Jacek Anaszewski Signed-off-by: Phillip Potter Link: https://lore.kernel.org/r/20210503115736.2104747-10-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- drivers/leds/leds-lp5523.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/leds/leds-lp5523.c +++ b/drivers/leds/leds-lp5523.c @@ -318,7 +318,9 @@ static int lp5523_init_program_engine(st /* Let the programs run for couple of ms and check the engine status */ usleep_range(3000, 6000); - lp55xx_read(chip, LP5523_REG_STATUS, &status); + ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); + if (ret) + goto out; status &= LP5523_ENG_STATUS_MASK; if (status != LP5523_ENG_STATUS_MASK) {