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=-10.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 3ED37C07E95 for ; Wed, 7 Jul 2021 14:45:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 28ED161C6C for ; Wed, 7 Jul 2021 14:45:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232167AbhGGOsM (ORCPT ); Wed, 7 Jul 2021 10:48:12 -0400 Received: from netrider.rowland.org ([192.131.102.5]:55135 "HELO netrider.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S232154AbhGGOsG (ORCPT ); Wed, 7 Jul 2021 10:48:06 -0400 Received: (qmail 178114 invoked by uid 1000); 7 Jul 2021 10:45:25 -0400 Date: Wed, 7 Jul 2021 10:45:25 -0400 From: Alan Stern To: Jeffrey Walton Cc: linux-usb@vger.kernel.org Subject: Re: CH341 driver and the 5.4 kernel Message-ID: <20210707144525.GA177599@rowland.harvard.edu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Wed, Jul 07, 2021 at 03:33:52AM -0400, Jeffrey Walton wrote: > Hi Everyone, > > I'm trying to track down the cause of some garbage in a response when > using an ELM327 (https://www.elmelectronics.com/ic/elm327/) with a > CH341 serial controller. > > I see there's been a fair amount of activity with the CH341 > (https://github.com/torvalds/linux/commits/master/drivers/usb/serial/ch341.c), > but I can't tell if its been backported to the 5.4 kernel. > Specifically, the 5.4.0-77 kernel supplied with Ubuntu 18.04 and Mint > 20.1. > > Does anyone know if the fixes and improvements for the CH341 have made > their way into the 5.4 kernel? If you're talking about the 5.4.y kernels from kernel.org (as opposed to the kernels supplied by Ubuntu, which might have goodness knows what in them), you can see for yourself easily enough: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/log/drivers/usb/serial/ch341.c?h=linux-5.4.y Alan Stern