From patchwork Mon Jul 5 08:18:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Breathitt Gray X-Patchwork-Id: 12358411 X-Patchwork-Delegate: jic23@cam.ac.uk 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 C6CDDC07E98 for ; Mon, 5 Jul 2021 08:19:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A24E8613C8 for ; Mon, 5 Jul 2021 08:19:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230053AbhGEIWH (ORCPT ); Mon, 5 Jul 2021 04:22:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230000AbhGEIWH (ORCPT ); Mon, 5 Jul 2021 04:22:07 -0400 Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4C5DC061574; Mon, 5 Jul 2021 01:19:29 -0700 (PDT) Received: by mail-pf1-x429.google.com with SMTP id b12so14951619pfv.6; Mon, 05 Jul 2021 01:19:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=lwJZ+FRHmPdVwm0/Cne9BWGWHB7Nx2ph+8GMBriVPGo=; b=qghfU1Ic26rrzYU0rkpTSWDcEhb5c0NOIgjgWfhYyp5axzpVaF2tWiTEhum0GRfWhM Y0G/UPaghUKDzGYLyilG8VdUkM8yhrjsPXIDct8QTi8xO50pcLumVGtnv6acUX2ME8Qb g5OsIjaoRxtxwjVdUsiXXXmt1Y9sVN2ubtppGC8rqkBnyvD6nQ4l3ZyJ/LsnZYdO0K+2 C7UFf0YQDr6LeFAGJnVuR2dOvnT/lRdpz+m93stZPw3eTbvQ98EvcEenTRXWk4SlKL0U bj+hY54Hif9QH8SuDY71yRHkWQwHug7w4wVQ4IvCDhzVrhXqlc5QkNQoRyqooJlzwk4N uAxQ== 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=lwJZ+FRHmPdVwm0/Cne9BWGWHB7Nx2ph+8GMBriVPGo=; b=lVW9gqB5fL8ZyXCgppdwuH84rtlCP/VXFIJ3tIqGKgAsOzpHZRBl/cadQKcjgU2Kc6 312tN1qHfK822hO/K+G7cIFO1W32ku1Is8CQ8LwVZAHhmmqB6uj5VqZjie0XjedvUiRR cgpXUjoecTgpm61RmFh1+umqopU/sTr3vaDGf0Jg12eYgKC3Slrf3prnj7bhbPgpoEET MuNWgUa4nNTzLpAK08+9epvjvXiRQmTyDihD3R1oZKZrCjj/yM1wyyXL7VaEer7OmGbY 7/WUCOpvK9RdPPY+aqiN72V1baCjHeb61YnUqrjeZcj6j9sVi2njGGNIH09iwGFduqYg +bbQ== X-Gm-Message-State: AOAM532oMUT6Oafho4Ke0IC0BlEipq7H2WKZypVhi3D7NBKfezN6Sqsa O8yyx0tU0I50eJr068cr8Ps= X-Google-Smtp-Source: ABdhPJzDzeeL4WGvM1opfkx9OeUUJ5r5Ef7PkA03J1pzloGnM3C4c5JHEqnlXWV5KzY6fSkJyIDvIQ== X-Received: by 2002:aa7:943b:0:b029:321:809a:f0b with SMTP id y27-20020aa7943b0000b0290321809a0f0bmr794524pfo.32.1625473169361; Mon, 05 Jul 2021 01:19:29 -0700 (PDT) Received: from localhost.localdomain ([156.146.35.76]) by smtp.gmail.com with ESMTPSA id y11sm12209986pfo.160.2021.07.05.01.19.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Jul 2021 01:19:28 -0700 (PDT) From: William Breathitt Gray To: jic23@kernel.org Cc: linux-stm32@st-md-mailman.stormreply.com, kernel@pengutronix.de, a.fatoum@pengutronix.de, kamel.bouhara@bootlin.com, gwendal@chromium.org, alexandre.belloni@bootlin.com, david@lechnology.com, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, syednwaris@gmail.com, patrick.havelange@essensium.com, fabrice.gasnier@st.com, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com, o.rempel@pengutronix.de, jarkko.nikula@linux.intel.com, William Breathitt Gray Subject: [PATCH v12 01/17] counter: 104-quad-8: Return error when invalid mode during ceiling_write Date: Mon, 5 Jul 2021 17:18:49 +0900 Message-Id: <8a7614a06dbc60650fe60c31fa47d398890200f8.1625471640.git.vilhelm.gray@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org The 104-QUAD-8 only has two count modes where a ceiling value makes sense: Range Limit and Modulo-N. Outside of these two modes, setting a ceiling value is an invalid operation -- so let's report it as such by returning -EINVAL. Fixes: fc069262261c ("counter: 104-quad-8: Add lock guards - generic interface") Acked-by: Syed Nayyar Waris Signed-off-by: William Breathitt Gray --- drivers/counter/104-quad-8.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c index 09a9a77cce06..81f9642777fb 100644 --- a/drivers/counter/104-quad-8.c +++ b/drivers/counter/104-quad-8.c @@ -715,12 +715,13 @@ static ssize_t quad8_count_ceiling_write(struct counter_device *counter, case 1: case 3: quad8_preset_register_set(priv, count->id, ceiling); - break; + mutex_unlock(&priv->lock); + return len; } mutex_unlock(&priv->lock); - return len; + return -EINVAL; } static ssize_t quad8_count_preset_enable_read(struct counter_device *counter,