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=-7.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=no 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 66AD5C07E95 for ; Wed, 7 Jul 2021 21:56:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3FE7861C4C for ; Wed, 7 Jul 2021 21:56:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233257AbhGGV7R (ORCPT ); Wed, 7 Jul 2021 17:59:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56182 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232255AbhGGV7I (ORCPT ); Wed, 7 Jul 2021 17:59:08 -0400 Received: from mail-io1-xd2d.google.com (mail-io1-xd2d.google.com [IPv6:2607:f8b0:4864:20::d2d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75C85C061574 for ; Wed, 7 Jul 2021 14:56:27 -0700 (PDT) Received: by mail-io1-xd2d.google.com with SMTP id k16so5565513ios.10 for ; Wed, 07 Jul 2021 14:56:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:reply-to:from:date:message-id :subject:to:cc; bh=6ZNGBLB6dNdKgWr5wbsb6WJQw3HnvPHA3uIojd+3zcw=; b=Zf6g+Sqps/YTwX7c0RPmN7UWHjN1ZQ8gk3fpGkXsH5Gpwhbst+Rf5Cx+foEBN3r4FL PG/qyB2gmzXk699qqIOMSaybbe2CC3PNy9H7/Nu9R56XholrQigpeWasHW3UFEBqpBhx lWY8mAH3qSbJL+S+YpfLLi9Hg3MxuMqDq1KreAnU7VQyybtS/GJpZoiP73DhPZc4Wfy7 s1Bki4C9KKmbxm33HWSHiX2RocSpEMmUFkNgdt91zYELorHQ7NW7CYzODabE1JQoL1cb kKyAJmU0wDKdmAtjJ+CpR0tdbHojcI3BfSAYl3E4Y+n2RZRdrgxHpz/l4N1c5HpB4mGL 36nA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:reply-to :from:date:message-id:subject:to:cc; bh=6ZNGBLB6dNdKgWr5wbsb6WJQw3HnvPHA3uIojd+3zcw=; b=cgCxA71L7OjwETm1oy9no65n1FMLEe3d4vi4KMOqZ164YQCCgJTgV+g5yW2L6t9LSw WVIxn+ZfzF71XemXYTRAmE2MSBw7vXklJ+dQoe9Gvp3r0QoCpbLLDD1prENc2KGDamnS +uBWBH1hZLE2dDp55t55fyycrGFJWURG2JFQk9bU5PKjMrcfrECoe+LQ+/yPF8HGGmXM ggg8RhBStRN2gqtzd0fpD03tav/GEwu61EAzgTM0XHlSMydSZCRIumTh7F8TmSKY2Kjr QZ6uqSE7KeXp9lcX3KqxFE2zNT3jWGysGv7z2azcDZMgEp76DHxCrDPo64yno0WdJYbQ q8fg== X-Gm-Message-State: AOAM532+gbs+cFyj+4ZdIQUbq3/uTKUbfNsT9sGu8ozS6Y1Qvk2Ax4zA bztPejrrGUm5eBOakrwUybJ2rqSR1vVmhbboPX6dGx6jiEM= X-Google-Smtp-Source: ABdhPJwFEu8Q8KqlxBePdC6cbyNR4b/EmxjkQ0dB44XhZnlkdjzzB0VJ0PsxNXjwrjRwOV4zAKgwTiBDICQiulXPQOc= X-Received: by 2002:a05:6638:3882:: with SMTP id b2mr11949399jav.15.1625694986927; Wed, 07 Jul 2021 14:56:26 -0700 (PDT) MIME-Version: 1.0 References: <20210707144525.GA177599@rowland.harvard.edu> In-Reply-To: <20210707144525.GA177599@rowland.harvard.edu> Reply-To: noloader@gmail.com From: Jeffrey Walton Date: Wed, 7 Jul 2021 17:55:36 -0400 Message-ID: Subject: Re: CH341 driver and the 5.4 kernel To: Alan Stern Cc: linux-usb@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Wed, Jul 7, 2021 at 10:45 AM Alan Stern wrote: > > 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 Thanks Alan. As far as I know, Ubuntu uses -oem kernels that track upstream. All upstream changes should be merged into Ubuntu's gear. Also see https://wiki.ubuntu.com/Kernel/OEMKernel. Jeff