From patchwork Wed Apr 14 17:29:14 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: 421207 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=ham 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 325ADC43462 for ; Wed, 14 Apr 2021 17:29:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A370613D1 for ; Wed, 14 Apr 2021 17:29:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350403AbhDNRaH (ORCPT ); Wed, 14 Apr 2021 13:30:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350332AbhDNRaC (ORCPT ); Wed, 14 Apr 2021 13:30:02 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99DB2C06138E for ; Wed, 14 Apr 2021 10:29:34 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id m18so8310833plc.13 for ; Wed, 14 Apr 2021 10:29:34 -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=NtcyLr97vt7tBtf+Evf5JrbdU0JuK+5BO0OeaqqfGII=; b=U3p66+Be9J9brLNZfLCAa72fmyHRhYkU2dLerndAukBzw9zqH+m1l2LBgLkyJu6/04 s1uRRZ+UJIiAk+qKJDPUqbNlfS9edRSd1TqeoyJPJaOheuKDsALg4RevMCAL+aM1mJni RIbOhRQmnkWslS55DoyiBjiz4r02jbQvoJm18= 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=NtcyLr97vt7tBtf+Evf5JrbdU0JuK+5BO0OeaqqfGII=; b=nxJeZRba08dW+DmYU1KUWdJlxVvG9cPGm16sL7SU+CRDVRKMEV84Oc9q6MsCqkKGlU JS50fiC5xjuYFCcAaA7ulMqqH/lD8shiIZMz47Y9SnWVdXaT+d5XjkASzJnqpD1A66AB BMOIOOzSFMtdSiRNCjtSLNW2SEu+ohbzS9FioXxpUmjCRutRuC26PF9s9dOzCf3nmq3i 0awYTROoKktEk2XZr3R0eprkZYDxqbNaupyqC01r57Y3TM2epbJYyXhFd/j4Gmy7i+yF w1AKgGauBSV65IzMkg23Rs3tQdT6LciAkIwB0QBEiyXYd78hz6CuXUQdrDMPS8vOrNfN UxCQ== X-Gm-Message-State: AOAM533jbWN39JTAinGIJmK4RtdBCz27QSxYSpGh95M3onw7a9cUll3B K4g/XP+v5uXV2aqBFyzZMp/o8g== X-Google-Smtp-Source: ABdhPJwPcZosbX6F/FEtrRwct5NPpkw0jknr5o9f0r7xAc5sBoT3Dcx5C3arvvo3qFB/+caOXsY09g== X-Received: by 2002:a17:90a:ce8d:: with SMTP id g13mr4686960pju.85.1618421374136; Wed, 14 Apr 2021 10:29:34 -0700 (PDT) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:bae3:4af0:9792:1539]) by smtp.gmail.com with ESMTPSA id e31sm63460pjk.4.2021.04.14.10.29.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Apr 2021 10:29:33 -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 , Jani Nikula , Joonas Lahtinen , intel-gfx@lists.freedesktop.org Subject: [PATCH v19 4/6] misc: eeprom: at24: check suspend status before disable regulator Date: Thu, 15 Apr 2021 01:29:14 +0800 Message-Id: <20210414172916.2689361-5-hsinyi@chromium.org> X-Mailer: git-send-email 2.31.1.295.g9ea45b61b8-goog In-Reply-To: <20210414172916.2689361-1-hsinyi@chromium.org> References: <20210414172916.2689361-1-hsinyi@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@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. 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; }