From patchwork Wed Apr 7 10:39:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 12187695 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 EEFD6C433ED for ; Wed, 7 Apr 2021 10:40:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BDFD261242 for ; Wed, 7 Apr 2021 10:40:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351207AbhDGKkP (ORCPT ); Wed, 7 Apr 2021 06:40:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:49076 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234888AbhDGKkA (ORCPT ); Wed, 7 Apr 2021 06:40:00 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2785F613C6; Wed, 7 Apr 2021 10:39:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1617791990; bh=LIcRc7NYbE0x58pDWh179Yiiu/bA6nM3mAum4rSZ6K8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NScENpAnjzvxauWoRJWyrjJrKvw+wYzXWqDX3f5vtQq7qd65bLoRtY27PEmgyAX1+ kJWSr0WKJzMc8Hpe7zqRxdsKiekwqQIYihWSuIeUm3LiXABFjFcEMHufg3ANwuxqc+ fTJhCAZJ4Y28D9Zm45aaTnm82/7zcnK0WQYOBa6hhboVXUWCfjmKVm2EAyrE+4kqGO gz3HYdzOCuiel2LUGdefsYX4tQTTV66Qzs+y3BFHOnx4MYQFGBN4hFd1WzlKeKsV0R 5EPMQJTZV4HtVWoiYAkY+wrxaeo/tR9A5YWmjmNA3Qgo/rI8OKeY5avFEfqJoNw8NB MPe2wjoMTKHhw== Received: from johan by xi.lan with local (Exim 4.93.0.4) (envelope-from ) id 1lU5b5-0000Ex-0b; Wed, 07 Apr 2021 12:39:43 +0200 From: Johan Hovold To: Johan Hovold Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 09/24] USB: serial: opticon: fix TIOCGSERIAL implementation Date: Wed, 7 Apr 2021 12:39:10 +0200 Message-Id: <20210407103925.829-10-johan@kernel.org> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20210407103925.829-1-johan@kernel.org> References: <20210407103925.829-1-johan@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@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. The xmit_fifo_size parameter could be used to set the hardware transmit fifo size of a legacy UART when it could not be detected, but the interface is limited to eight bits and should be left unset when not used. Similarly, baud_base could be used to set the UART base clock when it could not be detected but might as well be left unset when it is not known. The close_delay and closing_wait parameters returned by TIOCGSERIAL are specified in centiseconds (not jiffies). The driver does not yet support changing these, but let's report back the default values actually used (0.5 and 30 seconds, respectively). Fixes: faac64ad9c7b ("USB: serial: opticon: add serial line ioctls") Signed-off-by: Johan Hovold --- drivers/usb/serial/opticon.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c index eecb72aef83e..1c7e5dc2c272 100644 --- a/drivers/usb/serial/opticon.c +++ b/drivers/usb/serial/opticon.c @@ -360,12 +360,9 @@ static int get_serial_info(struct tty_struct *tty, /* fake emulate a 16550 uart to make userspace code happy */ ss->type = PORT_16550A; ss->line = port->minor; - ss->port = 0; - ss->irq = 0; - ss->xmit_fifo_size = 1024; - ss->baud_base = 9600; - ss->close_delay = 5*HZ; - ss->closing_wait = 30*HZ; + ss->close_delay = 50; + ss->closing_wait = 3000; + return 0; }