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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 E9154C2BA16 for ; Wed, 1 Apr 2020 16:35:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B04022063A for ; Wed, 1 Apr 2020 16:35:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585758908; bh=sBir27o/Pb8WIzswOqkdHncGGar33AnRwyEMUFF4b2o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KE6ZhuNc0ZtzEgWWMqo7SJy94dSLxEPXS9ECijSpWRB/SzkXr8Yug14+bIhniX5ym 5PAlQNonHLn/kPU1JWJnoXWJDdMyX+A8quABwtjZBxyk9zmmesM3JZmAipoh7yM/9y lQM+EDG8jozUhirDXjXO2AZAu70P3reWnYpEJxJg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388711AbgDAQfH (ORCPT ); Wed, 1 Apr 2020 12:35:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:33790 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387563AbgDAQfF (ORCPT ); Wed, 1 Apr 2020 12:35:05 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B5C3920658; Wed, 1 Apr 2020 16:35:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585758905; bh=sBir27o/Pb8WIzswOqkdHncGGar33AnRwyEMUFF4b2o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mgEQPAKjYi/4ZqFvdt54Y1sIdbnCUoIBDg2R6HAQLhlqWXHz/ArVWAK6GQ1V9TsW8 KhZ503CsAAgQ6F4Eqa7QwtwtcVtmMLRnyjYmaUh/VONoRnKi+IFGebv8Ae5Cp3cK6X m2EWcbmvpHCFL3coIBpnN6yBYPPY0GJgyKghnsh8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Stephan Gerhold , Linus Waleij , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 4.9 018/102] iio: magnetometer: ak8974: Fix negative raw values in sysfs Date: Wed, 1 Apr 2020 18:17:21 +0200 Message-Id: <20200401161536.017379826@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200401161530.451355388@linuxfoundation.org> References: <20200401161530.451355388@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stephan Gerhold commit b500c086e4110829a308c23e83a7cdc65b26228a upstream. At the moment, reading from in_magn_*_raw in sysfs tends to return large values around 65000, even though the output of ak8974 is actually limited to ±32768. This happens because the value is never converted to the signed 16-bit integer variant. Add an explicit cast to s16 to fix this. Fixes: 7c94a8b2ee8c ("iio: magn: add a driver for AK8974") Signed-off-by: Stephan Gerhold Reviewed-by: Linus Waleij Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/magnetometer/ak8974.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/magnetometer/ak8974.c +++ b/drivers/iio/magnetometer/ak8974.c @@ -477,7 +477,7 @@ static int ak8974_read_raw(struct iio_de * We read all axes and discard all but one, for optimized * reading, use the triggered buffer. */ - *val = le16_to_cpu(hw_values[chan->address]); + *val = (s16)le16_to_cpu(hw_values[chan->address]); ret = IIO_VAL_INT; }