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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 558F7C43470 for ; Wed, 7 Apr 2021 10:24:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 217DE613A0 for ; Wed, 7 Apr 2021 10:24:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351023AbhDGKYS (ORCPT ); Wed, 7 Apr 2021 06:24:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:44720 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235325AbhDGKYA (ORCPT ); Wed, 7 Apr 2021 06:24:00 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 57972613AF; Wed, 7 Apr 2021 10:23:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1617791030; bh=q75t/Q1MGPC6xo3XgfSDrASakXyQ8MWDs3muYTJjvH8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kiI+LqReC4zKxnROfhOs4yC5XgkniTOl7xrPh4ldeUufjSSc5O4w5onJTGR1FFMjr Q+Og0+/5Z7f4jPRTrA3Yelxw7PIeb8IAkeuRCJDvU9UexKcVU5yBmVpWwen42lgGzh EWbKiUbVYG7d+f+TxZYcwhQ2aB+opkg4EZwHj2BwvHd0IQae/d3rYB4wrTd8KMyBji ByFRWU85PnpD3grnB/HuGzlL+N/KeEFsDl+kAiJwXo75Fh3feRcBARGOc2zzY3Hqvw wuoWJMrnUtRjYRSScKohL8ZKmPdKKM+yEa64cEa2j3NpfrGPoppAQBixOjIJYdRuUV 0wvQy5OPK4tVA== Received: from johan by xi.lan with local (Exim 4.93.0.4) (envelope-from ) id 1lU5Lb-0008RH-4O; Wed, 07 Apr 2021 12:23:43 +0200 From: Johan Hovold To: Greg Kroah-Hartman Cc: Jiri Slaby , linux-staging@lists.linux.dev, greybus-dev@lists.linaro.org, linux-kernel@vger.kernel.org, Johan Hovold Subject: [PATCH 06/16] staging: greybus: uart: fix unprivileged TIOCCSERIAL Date: Wed, 7 Apr 2021 12:23:24 +0200 Message-Id: <20210407102334.32361-7-johan@kernel.org> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20210407102334.32361-1-johan@kernel.org> References: <20210407102334.32361-1-johan@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org TIOCSSERIAL is a horrid, underspecified, legacy interface which for most serial devices is only useful for setting the close_delay and closing_wait parameters. A non-privileged user has only ever been able to set the since long deprecated ASYNC_SPD flags and trying to change any other *supported* feature should result in -EPERM being returned. Setting the current values for any supported features should return success. Fix the greybus implementation which instead indicated that the TIOCSSERIAL ioctl was not even implemented when a non-privileged user set the current values. Fixes: e68453ed28c5 ("greybus: uart-gb: now builds, more framework added") Signed-off-by: Johan Hovold --- drivers/staging/greybus/uart.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 29846dc1e1bf..a520f7f213db 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -641,8 +641,6 @@ static int set_serial_info(struct tty_struct *tty, if ((close_delay != gb_tty->port.close_delay) || (closing_wait != gb_tty->port.closing_wait)) retval = -EPERM; - else - retval = -EOPNOTSUPP; } else { gb_tty->port.close_delay = close_delay; gb_tty->port.closing_wait = closing_wait; -- 2.26.3