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=-22.3 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,MENTIONS_GIT_HOSTING, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 15B8FC0018C for ; Mon, 7 Dec 2020 14:07:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C7BD1235E4 for ; Mon, 7 Dec 2020 14:07:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725822AbgLGOHY (ORCPT ); Mon, 7 Dec 2020 09:07:24 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:24606 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725917AbgLGOHY (ORCPT ); Mon, 7 Dec 2020 09:07:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1607349957; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=afa9i0Bef4Cb3mOnPuAfy6fMFqpa+/My9xmYdxXU/TQ=; b=Je4Qnlb5UV1uNBOBZfZCtxoLXZedsdLvEFE479HKbCBH6z4Y19xbhR+g/bMJpPtjgHjWX7 uN+tCli/Rh1DvXc3eae6URzETAZ7iXsARaXX4agyKkffggGWC0WH7g7I8D7/hUZtvZI3V3 Q5gPGfPjwGqUqaquqz44Xk10GuMgnVA= Received: from mail-ed1-f72.google.com (mail-ed1-f72.google.com [209.85.208.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-226-K8VzEiknM7a5lVnB3vH-Kw-1; Mon, 07 Dec 2020 09:05:55 -0500 X-MC-Unique: K8VzEiknM7a5lVnB3vH-Kw-1 Received: by mail-ed1-f72.google.com with SMTP id d12so3509691edx.23 for ; Mon, 07 Dec 2020 06:05:55 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=afa9i0Bef4Cb3mOnPuAfy6fMFqpa+/My9xmYdxXU/TQ=; b=U3IfJSHtuMsEsGXtn1Nsf4EjurFAvj+hwknnl47k6kKyWERn0ZEMOLYPtlste9zDok qQ8YpA8XVW9fxCEro8qP+i7ufdfW7OYoobThsqlr/vpxv9h/5UChlDR3aY9AMcO9Ojqz V0hWqregNRn66kPYsIxXqMob95IcPc/eyVH2rirKe//CsTjowwPP7mFSKupk4jF4JzAt YzbJM3ZON2og+3HJXRai1zto1LzSQvv4Bw6l9n82Fxb/f7+LPXk7XILRlzuYG6t2EnPz VzwWbo/vDfpx6wQZiDQC43Z1CJ04vx5WP8vsxYk8s8ICoRerqWHfzgHgBS+UP/qngCkl J0lg== X-Gm-Message-State: AOAM532i9fK+eNMfTpTu4S5QXjvSDzilzmO+PLQHHclFOvHR3Hb1jHdf 15MEkSOs+bFaAL1C1vkcGqYbR26zt8v+HPauthPp1EoXKRDYLB5LGtkC5+SnhCq/MasNuyPhbQN 1ZKn90FFvKSlVvLW2qnpRDYIcYY+78u+fYg== X-Received: by 2002:a17:906:1199:: with SMTP id n25mr18736559eja.293.1607349954377; Mon, 07 Dec 2020 06:05:54 -0800 (PST) X-Google-Smtp-Source: ABdhPJwraVwT1JcG9eO2qX/pyTXO58k7gNNbrJ+XGPs1jOdznikQXAjUUeHwWvUuK1v++EvFYzp4fg== X-Received: by 2002:a17:906:1199:: with SMTP id n25mr18736540eja.293.1607349954217; Mon, 07 Dec 2020 06:05:54 -0800 (PST) Received: from x1.localdomain (2001-1c00-0c0c-fe00-d2ea-f29d-118b-24dc.cable.dynamic.v6.ziggo.nl. [2001:1c00:c0c:fe00:d2ea:f29d:118b:24dc]) by smtp.gmail.com with ESMTPSA id cb21sm13461039edb.57.2020.12.07.06.05.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 07 Dec 2020 06:05:53 -0800 (PST) Subject: Re: [PATCH] platform/x86: dell-wmi-sysman: work around for BIOS bug To: Divya Bharathi , dvhart@infradead.org Cc: LKML , Linux Next Mailing List , platform-driver-x86@vger.kernel.org, Divya Bharathi , Mario Limonciello , Prasanth KSR References: <20201202131935.307372-1-divya.bharathi@dell.com> From: Hans de Goede Message-ID: <39f8a3a5-88ff-7e1d-8ce3-ebec8c01427e@redhat.com> Date: Mon, 7 Dec 2020 15:05:52 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201202131935.307372-1-divya.bharathi@dell.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org Hi, On 12/2/20 2:19 PM, Divya Bharathi wrote: > BIOS sets incorrect value (zero) when SET value passed for integer attribute > with + sign. Added workaround to remove + sign before passing input to BIOS > > Co-developed-by: Mario Limonciello > Signed-off-by: Mario Limonciello > Co-developed-by: Prasanth KSR > Signed-off-by: Prasanth KSR > Signed-off-by: Divya Bharathi Thank you for your patch, I've applied this patch to my review-hans branch: https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans Note it will show up in my review-hans branch once I've pushed my local branch there, which might take a while. Once I've run some tests on this branch the patches there will be added to the platform-drivers-x86/for-next branch and eventually will be included in the pdx86 pull-request to Linus for the next merge-window. Regards, Hans > --- > drivers/platform/x86/dell-wmi-sysman/int-attributes.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/drivers/platform/x86/dell-wmi-sysman/int-attributes.c b/drivers/platform/x86/dell-wmi-sysman/int-attributes.c > index ea773d8e8d3a..75aedbb733be 100644 > --- a/drivers/platform/x86/dell-wmi-sysman/int-attributes.c > +++ b/drivers/platform/x86/dell-wmi-sysman/int-attributes.c > @@ -39,7 +39,7 @@ static ssize_t current_value_show(struct kobject *kobj, struct kobj_attribute *a > * @instance_id: The instance on which input is validated > * @buf: Input value > */ > -static int validate_integer_input(int instance_id, const char *buf) > +static int validate_integer_input(int instance_id, char *buf) > { > int in_val; > int ret; > @@ -51,6 +51,12 @@ static int validate_integer_input(int instance_id, const char *buf) > in_val > wmi_priv.integer_data[instance_id].max_value) > return -EINVAL; > > + /* workaround for BIOS error. > + * validate input to avoid setting 0 when integer input passed with + sign > + */ > + if (*buf == '+') > + memmove(buf, (buf + 1), strlen(buf + 1) + 1); > + > return ret; > } > >