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=-18.8 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 E2577C433DB for ; Mon, 1 Mar 2021 21:02:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC7EC60231 for ; Mon, 1 Mar 2021 21:02:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242791AbhCAVCC (ORCPT ); Mon, 1 Mar 2021 16:02:02 -0500 Received: from mail.kernel.org ([198.145.29.99]:48316 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236799AbhCARLX (ORCPT ); Mon, 1 Mar 2021 12:11:23 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4D31164EE0; Mon, 1 Mar 2021 16:43:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614616987; bh=hlE0JUM/23a4ivi3JNzk5JY06wuFXv1XhWy9kr18AuI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Iwr6xWH4lk6O3+6r2ZVZmX5XcbikHm1yaOAisiytlhYnKVnpotA7v4TAf4Mchlzb7 cc9lKg+j2vgYu8vBcD4sx0moY0qp9Qj455graKFggBPcqN8hyUKwRP2Yy2qLlG++9E q67lmZXD+XLxb8pbK5VzzTxkmoekQA+33tY9/snk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Simon South , Thierry Reding , Sasha Levin Subject: [PATCH 4.19 156/247] pwm: rockchip: rockchip_pwm_probe(): Remove superfluous clk_unprepare() Date: Mon, 1 Mar 2021 17:12:56 +0100 Message-Id: <20210301161039.305655339@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161031.684018251@linuxfoundation.org> References: <20210301161031.684018251@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: Simon South [ Upstream commit d5d8d675865ccddfe4da26c85f22c55cec663bf2 ] If rockchip_pwm_probe() fails to register a PWM device it calls clk_unprepare() for the device's PWM clock, without having first disabled the clock and before jumping to an error handler that also unprepares it. This is likely to produce warnings from the kernel about the clock being unprepared when it is still enabled, and then being unprepared when it has already been unprepared. Prevent these warnings by removing this unnecessary call to clk_unprepare(). Fixes: 48cf973cae33 ("pwm: rockchip: Avoid glitches on already running PWMs") Signed-off-by: Simon South Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin --- drivers/pwm/pwm-rockchip.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/pwm/pwm-rockchip.c b/drivers/pwm/pwm-rockchip.c index 4d99d468df09a..48bcc853d57a7 100644 --- a/drivers/pwm/pwm-rockchip.c +++ b/drivers/pwm/pwm-rockchip.c @@ -370,7 +370,6 @@ static int rockchip_pwm_probe(struct platform_device *pdev) ret = pwmchip_add(&pc->chip); if (ret < 0) { - clk_unprepare(pc->clk); dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret); goto err_pclk; } -- 2.27.0