From patchwork Mon Sep 26 13:32:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Yingliang X-Patchwork-Id: 609406 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13E8EC6FA86 for ; Mon, 26 Sep 2022 14:56:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235459AbiIZO4g (ORCPT ); Mon, 26 Sep 2022 10:56:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235381AbiIZOz6 (ORCPT ); Mon, 26 Sep 2022 10:55:58 -0400 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5ACE6796AE; Mon, 26 Sep 2022 06:26:15 -0700 (PDT) Received: from dggpemm500024.china.huawei.com (unknown [172.30.72.55]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4Mbk3y4YlKzHpcc; Mon, 26 Sep 2022 21:23:58 +0800 (CST) Received: from dggpemm500007.china.huawei.com (7.185.36.183) by dggpemm500024.china.huawei.com (7.185.36.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Mon, 26 Sep 2022 21:26:13 +0800 Received: from huawei.com (10.175.103.91) by dggpemm500007.china.huawei.com (7.185.36.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Mon, 26 Sep 2022 21:26:13 +0800 From: Yang Yingliang To: , , CC: , , , Subject: [PATCH -next] backlight: pwm_bl: Switch to use dev_err_probe() helper Date: Mon, 26 Sep 2022 21:32:58 +0800 Message-ID: <20220926133258.1104850-1-yangyingliang@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.175.103.91] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpemm500007.china.huawei.com (7.185.36.183) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org In the probe path, dev_err() can be replaced with dev_err_probe() which will check if error code is -EPROBE_DEFER and prints the error name. It also sets the defer probe reason which can be checked later through debugfs. It's more simple in error path. --- drivers/video/backlight/pwm_bl.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index c0523a0269ee..ae858e3bd38f 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -513,9 +513,8 @@ static int pwm_backlight_probe(struct platform_device *pdev) } if (IS_ERR(pb->pwm)) { - ret = PTR_ERR(pb->pwm); - if (ret != -EPROBE_DEFER) - dev_err(&pdev->dev, "unable to request PWM\n"); + ret = dev_err_probe(&pdev->dev, PTR_ERR(pb->pwm), + "unable to request PWM\n"); goto err_alloc; }