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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 A02FEC3A5A6 for ; Thu, 19 Sep 2019 22:21:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7027021920 for ; Thu, 19 Sep 2019 22:21:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568931694; bh=QMakK+G65d4PJQDEwWQuOtWlgbNXWcSWTNdfOIwnlt8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kG75j/Z4U2vYpiRnfvHq4LNc/a7+itciZOEjy/7HPC4+mCKM0csAl3k/D2Ty99lpc 4HRFDNQWVaZdROHIDGr3l+32FSsAk9GV7cr1b3m5CVJ3nJ1WUYffyA3q7Zk7PVyMgF nEQM+ujIpI722UNAa9d5KDp5Nkw7XEQdoCm4lZcA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2394057AbfISWVd (ORCPT ); Thu, 19 Sep 2019 18:21:33 -0400 Received: from mail.kernel.org ([198.145.29.99]:36006 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390113AbfISWV3 (ORCPT ); Thu, 19 Sep 2019 18:21:29 -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 BFF4E21920; Thu, 19 Sep 2019 22:21:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568931689; bh=QMakK+G65d4PJQDEwWQuOtWlgbNXWcSWTNdfOIwnlt8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U4cm3FHjazkMyHCkItQHQF85xeKsLunzlW2W9ZFfG+Fl44lf7Z21FVI18Dda/bVTN wAr8n9kmaEnw18k+KhO5fo0SOSeSUHSpLoS9P9E5BCJbUgFJ1ZxyEA2gW7VbofrMK4 LkR1jY+dmjHG5vmoXjgUUd95BRR6NQf/g0Qwzo6E= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Razvan Stefanescu Subject: [PATCH 4.9 42/74] tty/serial: atmel: reschedule TX after RX was started Date: Fri, 20 Sep 2019 00:03:55 +0200 Message-Id: <20190919214808.944700419@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190919214800.519074117@linuxfoundation.org> References: <20190919214800.519074117@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Razvan Stefanescu commit d2ace81bf902a9f11d52e59e5d232d2255a0e353 upstream. When half-duplex RS485 communication is used, after RX is started, TX tasklet still needs to be scheduled tasklet. This avoids console freezing when more data is to be transmitted, if the serial communication is not closed. Fixes: 69646d7a3689 ("tty/serial: atmel: RS485 HD w/DMA: enable RX after TX is stopped") Signed-off-by: Razvan Stefanescu Cc: stable Link: https://lore.kernel.org/r/20190813074025.16218-1-razvan.stefanescu@microchip.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/atmel_serial.c | 1 - 1 file changed, 1 deletion(-) --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -1279,7 +1279,6 @@ atmel_handle_transmit(struct uart_port * atmel_port->hd_start_rx = false; atmel_start_rx(port); - return; } atmel_tasklet_schedule(atmel_port, &atmel_port->tasklet_tx);