From patchwork Wed Apr 7 10:39:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 12187711 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 C86ABC433ED for ; Wed, 7 Apr 2021 10:40:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 975EB613B3 for ; Wed, 7 Apr 2021 10:40:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351262AbhDGKkY (ORCPT ); Wed, 7 Apr 2021 06:40:24 -0400 Received: from mail.kernel.org ([198.145.29.99]:49064 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351165AbhDGKkA (ORCPT ); Wed, 7 Apr 2021 06:40:00 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EE78D613A9; 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=1617791991; bh=lX3F9lxiWnA0PUBwgaH8gncJVnX0qeQaXfJ4Wsy4tIs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ooIJ4wp+Eg08Jal4oFXiv6Vm8gWIi6pICfx+QOs4Wqci35HW50fIbG+hrfEscLEpt 8mTYAK+z3WzqlPVkRvQ3gjthaf/sgeJupSCuQYAIQVNPlUVFRjz9+wxsY5RtvpQ6lF WxyWctykOjqo5CHc4eg68UuCM9X04EoyKLcooXxJnfTcHQw/qoYfvlA1WKtjj6kkop 3mZPeA0fRvi/hwtzRMIADAuUumOkYT8iUIE0HivfeWuJ6/ZPIkMWreozzgPB+wUj4L J+S/NsCY1+kVLQkB4+zvflAkVwVXaWKH8J4tVxfuKyiW8BDu/x9aqapKT0doce24lx 3Yf4wrrQhD8Mw== Received: from johan by xi.lan with local (Exim 4.93.0.4) (envelope-from ) id 1lU5b5-0000FO-RH; 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 18/24] USB: serial: whiteheat: fix TIOCGSERIAL implementation Date: Wed, 7 Apr 2021 12:39:19 +0200 Message-Id: <20210407103925.829-19-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 port parameter is used to set the I/O port and does not make any sense to use for USB serial devices. 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. 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). Signed-off-by: Johan Hovold --- drivers/usb/serial/whiteheat.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c index ccfd5ed652cd..c8b10faa2ff8 100644 --- a/drivers/usb/serial/whiteheat.c +++ b/drivers/usb/serial/whiteheat.c @@ -170,7 +170,6 @@ static int firm_report_tx_done(struct usb_serial_port *port); #define COMMAND_PORT 4 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ #define COMMAND_TIMEOUT_MS 2000 -#define CLOSING_DELAY (30 * HZ) /***************************************************************************** @@ -447,12 +446,9 @@ static int whiteheat_get_serial(struct tty_struct *tty, ss->type = PORT_16654; ss->line = port->minor; - ss->port = port->port_number; - ss->xmit_fifo_size = kfifo_size(&port->write_fifo); - ss->custom_divisor = 0; ss->baud_base = 460800; - ss->close_delay = CLOSING_DELAY; - ss->closing_wait = CLOSING_DELAY; + ss->close_delay = 50; + ss->closing_wait = 3000; return 0; }