From patchwork Mon Aug 17 15:10:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 265929 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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, 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 4DC9AC433E3 for ; Mon, 17 Aug 2020 19:44:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2216A20716 for ; Mon, 17 Aug 2020 19:44:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597693461; bh=CaGu3jCShAi6zK9n0jAB+MVmHli5uXnzyL5xTif5KX8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=pOBgYR7j1X4j7fTPE3tEJkVRx51vADQPhFXPra3yMyer5QRrNUfZVn894QmOO6kh9 YUKOYxteyGOeX/EOHIMHWiehsTsp1QxPYY22rTMcHvdp+MU9/pe5HzOzT6o2sm6nux Bv99GCHzh1K9rTCTdvbLHyUqAf8usIDfXlc+LcsQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732622AbgHQToP (ORCPT ); Mon, 17 Aug 2020 15:44:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:49154 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729511AbgHQPXB (ORCPT ); Mon, 17 Aug 2020 11:23:01 -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 92C3E20825; Mon, 17 Aug 2020 15:23:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597677781; bh=CaGu3jCShAi6zK9n0jAB+MVmHli5uXnzyL5xTif5KX8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rp2FmgRsUo5/TtE75bzMpFGYloBh1P96iozItvGki82C3gaKH0u31xbD9ktRxSOBx rsWE1RWvNXvm38HH0igip1P+Wip4bIcTqGjRtKQlByJSjB3XZVXlRKqPZFq8P36NJg aEO4tNG85GXhysmPRpB6o8f7dHmkxJInaIoM/nDU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Michael Tretter , Jani Nikula , Emil Velikov , Sasha Levin Subject: [PATCH 5.8 105/464] drm/debugfs: fix plain echo to connector "force" attribute Date: Mon, 17 Aug 2020 17:10:58 +0200 Message-Id: <20200817143838.823807881@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143833.737102804@linuxfoundation.org> References: <20200817143833.737102804@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Michael Tretter [ Upstream commit c704b17071c4dc571dca3af4e4151dac51de081a ] Using plain echo to set the "force" connector attribute fails with -EINVAL, because echo appends a newline to the output. Replace strcmp with sysfs_streq to also accept strings that end with a newline. v2: use sysfs_streq instead of stripping trailing whitespace Signed-off-by: Michael Tretter Reviewed-by: Jani Nikula Signed-off-by: Emil Velikov Link: https://patchwork.freedesktop.org/patch/msgid/20170817104307.17124-1-m.tretter@pengutronix.de Signed-off-by: Sasha Levin --- drivers/gpu/drm/drm_debugfs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 2bea221307037..bfe4602f206b4 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -311,13 +311,13 @@ static ssize_t connector_write(struct file *file, const char __user *ubuf, buf[len] = '\0'; - if (!strcmp(buf, "on")) + if (sysfs_streq(buf, "on")) connector->force = DRM_FORCE_ON; - else if (!strcmp(buf, "digital")) + else if (sysfs_streq(buf, "digital")) connector->force = DRM_FORCE_ON_DIGITAL; - else if (!strcmp(buf, "off")) + else if (sysfs_streq(buf, "off")) connector->force = DRM_FORCE_OFF; - else if (!strcmp(buf, "unspecified")) + else if (sysfs_streq(buf, "unspecified")) connector->force = DRM_FORCE_UNSPECIFIED; else return -EINVAL;