From patchwork Fri May 7 13:14:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hsin-Yi Wang X-Patchwork-Id: 1475521 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.a=rsa-sha256 header.s=google header.b=Bn7vnWvw; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Fc9s74F89z9t0Y for ; Fri, 7 May 2021 23:14:35 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237129AbhEGNP2 (ORCPT ); Fri, 7 May 2021 09:15:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39922 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237153AbhEGNPY (ORCPT ); Fri, 7 May 2021 09:15:24 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D558C061343 for ; Fri, 7 May 2021 06:14:23 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id h7so5126693plt.1 for ; Fri, 07 May 2021 06:14:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=xcouiPP4ZWr6sE0GiZdxnLUxfCWsAQ8aBA7BAFbwZSg=; b=Bn7vnWvwErgkHww/wyQaRKbnP9HyfiwnkzeUkAsUBO0BgofkV3NljJIagFWPurDaho YOgo+zkazaGGORdA2xpfpMGYBWtNss8jXkpPQf801I83KdaJkDXqOa8Na8gPZY/8+62T w2M9LP5s2KYkB90H9MdCsCEPDNiPtvh/h8Fmg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=xcouiPP4ZWr6sE0GiZdxnLUxfCWsAQ8aBA7BAFbwZSg=; b=E2134IU0M2JTk5nOcS1XLzFCOv2MY+K9Hw7zM3xskjvgqcl6x2wc3zvHkWPOZEiAp4 8kaFSwgXjh7cg0VPdBT6Vg2feugda0zplLWsWbbGNf47/EZUx/+bOzCBPAj2svehgSed S2wqpUNJdnpp/g87MPnug4X/GvC/PU9DJy6L5jX4/v/1afR13IRfnVAu/4wgB+gSUlx/ gSQmpiA2sgGNWwNPqcajzsbuyAQXMFs1SV4q2U50AQteAr+wa5tw1C6BIaXE1c+mDpKa EE8oBHZBKDwZuA357+Y8/epa9AKvYKdoENrzP4Kne4LG1p8gGKhg3q0Md9BnWlDnaqWf BZ2A== X-Gm-Message-State: AOAM5325I32AEfxMfB5Is7buiMniuaMsI5n5VmbxGGEk2D45IKE3VBkL 7g/Sd+M8382VcI4EXTPbyS8GpzSy19F9SQ== X-Google-Smtp-Source: ABdhPJzNumxAR1eE6lJcWpdeibTL2dL9mK96HWGhUZ0Oi+h7BgBrA3QkEyBkkzCtGm7At7VQeu0w8g== X-Received: by 2002:a17:902:7205:b029:ed:6fc0:bbd4 with SMTP id ba5-20020a1709027205b02900ed6fc0bbd4mr10509724plb.4.1620393262574; Fri, 07 May 2021 06:14:22 -0700 (PDT) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:711f:8553:a124:a19]) by smtp.gmail.com with ESMTPSA id z29sm4656539pga.52.2021.05.07.06.14.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 May 2021 06:14:22 -0700 (PDT) From: Hsin-Yi Wang To: Wolfram Sang , Matthias Brugger , Rob Herring , Bartosz Golaszewski Cc: linux-i2c@vger.kernel.org, Qii Wang , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Mark Brown , Marek Szyprowski , Bibby Hsieh , Arnd Bergmann Subject: [PATCH v21 4/5] misc: eeprom: at24: check suspend status before disable regulator Date: Fri, 7 May 2021 21:14:05 +0800 Message-Id: <20210507131406.2224177-5-hsinyi@chromium.org> X-Mailer: git-send-email 2.31.1.607.g51e8a6a459-goog In-Reply-To: <20210507131406.2224177-1-hsinyi@chromium.org> References: <20210507131406.2224177-1-hsinyi@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org cd5676db0574 ("misc: eeprom: at24: support pm_runtime control") disables regulator in runtime suspend. If runtime suspend is called before regulator disable, it will results in regulator unbalanced disabling. Fixes: cd5676db0574 ("misc: eeprom: at24: support pm_runtime control") Signed-off-by: Hsin-Yi Wang Acked-by: Bartosz Golaszewski --- drivers/misc/eeprom/at24.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index 926408b41270..7a6f01ace78a 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -763,7 +763,8 @@ static int at24_probe(struct i2c_client *client) at24->nvmem = devm_nvmem_register(dev, &nvmem_config); if (IS_ERR(at24->nvmem)) { pm_runtime_disable(dev); - regulator_disable(at24->vcc_reg); + if (!pm_runtime_status_suspended(dev)) + regulator_disable(at24->vcc_reg); return PTR_ERR(at24->nvmem); } @@ -774,7 +775,8 @@ static int at24_probe(struct i2c_client *client) err = at24_read(at24, 0, &test_byte, 1); if (err) { pm_runtime_disable(dev); - regulator_disable(at24->vcc_reg); + if (!pm_runtime_status_suspended(dev)) + regulator_disable(at24->vcc_reg); return -ENODEV; }