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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 BDAC2C10F05 for ; Mon, 1 Apr 2019 17:51:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 860AD20883 for ; Mon, 1 Apr 2019 17:51:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554141063; bh=lK9osWPx2dvLAmhpnDmSMvlaqEIJnSggg2rXZxdOOvQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=N114bkDBfTMsgcOSHF6Kd/h//Ug0H2eU+LKxs9WoQfu6g4t+Fpbsq0KK9CZGKtSrK atzEAkdk6GIq8ezG/s32VzXMqiYcKoiS3PlVbSBloU9KcM+q3z/Sz6CCvHkPrXGEeD 6BBIIXaCZL7wIQtj2FoVUPumsNt8cMebNgqgEWnw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732627AbfDAR2V (ORCPT ); Mon, 1 Apr 2019 13:28:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:34174 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732775AbfDAR2U (ORCPT ); Mon, 1 Apr 2019 13:28:20 -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 62ED320856; Mon, 1 Apr 2019 17:28:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554139699; bh=lK9osWPx2dvLAmhpnDmSMvlaqEIJnSggg2rXZxdOOvQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vrl8lwP/7i0nGkKyW1ta/9jK1pzRMfhQZRcHTClJfzkddtYwFYH2Xc1az7bxNh1lA W/5Qtpbll1CFsAp9/mukx8gndo/UCItrstPmF0GN10CQLZoqCstA5a5IlnWwLCtQTY Ny9C/7Sm159omOsDcoDMVWX4xEe724nOY71PZZXo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Axel Lin , Thierry Reding , Bartosz Golaszewski Subject: [PATCH 4.9 45/56] gpio: adnp: Fix testing wrong value in adnp_gpio_direction_input Date: Mon, 1 Apr 2019 19:03:01 +0200 Message-Id: <20190401170106.373066782@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190401170103.398401360@linuxfoundation.org> References: <20190401170103.398401360@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Axel Lin commit c5bc6e526d3f217ed2cc3681d256dc4a2af4cc2b upstream. Current code test wrong value so it does not verify if the written data is correctly read back. Fix it. Also make it return -EPERM if read value does not match written bit, just like it done for adnp_gpio_direction_output(). Fixes: 5e969a401a01 ("gpio: Add Avionic Design N-bit GPIO expander support") Cc: Signed-off-by: Axel Lin Reviewed-by: Thierry Reding Signed-off-by: Bartosz Golaszewski Signed-off-by: Greg Kroah-Hartman --- drivers/gpio/gpio-adnp.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/drivers/gpio/gpio-adnp.c +++ b/drivers/gpio/gpio-adnp.c @@ -132,8 +132,10 @@ static int adnp_gpio_direction_input(str if (err < 0) goto out; - if (err & BIT(pos)) - err = -EACCES; + if (value & BIT(pos)) { + err = -EPERM; + goto out; + } err = 0;