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=-4.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 0AAABC4338F for ; Tue, 24 Aug 2021 11:44:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E2253613AB for ; Tue, 24 Aug 2021 11:44:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236550AbhHXLpN (ORCPT ); Tue, 24 Aug 2021 07:45:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:50344 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234787AbhHXLpH (ORCPT ); Tue, 24 Aug 2021 07:45:07 -0400 Received: by mail.kernel.org (Postfix) with ESMTPS id E6644613AD for ; Tue, 24 Aug 2021 11:44:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1629805463; bh=JG/bdXJFbsjCFuA1KvEGpAvJxBWZbHfe3cxS4XXAT0I=; h=From:To:Subject:Date:In-Reply-To:References:From; b=DUEzr7oEztuwWhIzH0RziWn4IX6yILf/bES2bJ8Qgh/WPR45gqwInKEdRDMeghxQk D2/QRG18ILMtKhlRkRzxmVCFt7blsbhzQLFkdxQvYQcJUuUu1BSPHhaEcR7TgylKQg ej9N9lDOSzA4+0RYuywHeAr5tS9X8wbqc8pulT53PYhihfU1S1H3DmyEkth9RvrjQQ GSOX9uRXI4qCcNe/SuWLUfmqlAmj1kXXCOYWyixAdnZ/T6UVul7A3rEJMtVhKWeQoX /Ky4nQL3RADz2H+WBdtb6i3AgeTOTBrarIu0Vb7SQXU5z+7cls/SDTXx2j+aCWm2O1 LUwBQi18u718A== From: bugzilla-daemon@bugzilla.kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 214131] ch341 communication problem Date: Tue, 24 Aug 2021 11:44:23 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: johan@kernel.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=3D214131 --- Comment #7 from Johan Hovold (johan@kernel.org) --- On Mon, Aug 23, 2021 at 09:14:49AM +0000, bugzilla-daemon@bugzilla.kernel.o= rg wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=3D214131 >=20 > --- Comment #5 from Paul Gr=C3=B6=C3=9Fel (pb.g@gmx.de) --- > I agree, I couldn't find any enumerate related symptoms here: I was able to reproduce the problem here. The device doesn't send a zero-length package in case the received data is a multiple of the endpoint size so that the bulk transfer doesn't complete (e.g. your flashing application may not receive replies). We need to revert the offending commit until we can figure out how to configure the device to send ZLPs. Thanks again for reporting this, and sorry about the breakage. Johan --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=