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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 D6863C43381 for ; Sat, 16 Feb 2019 16:26:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A999021A4A for ; Sat, 16 Feb 2019 16:26:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730954AbfBPQ0f (ORCPT ); Sat, 16 Feb 2019 11:26:35 -0500 Received: from icebox.esperi.org.uk ([81.187.191.129]:49366 "EHLO mail.esperi.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728198AbfBPQ0e (ORCPT ); Sat, 16 Feb 2019 11:26:34 -0500 Received: from loom (nix@sidle.srvr.nix [192.168.14.8]) by mail.esperi.org.uk (8.15.2/8.15.2) with ESMTP id x1GGJLSV017585; Sat, 16 Feb 2019 16:19:21 GMT From: Nix To: johan@kernel.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: 4.20.7: pl2303 not working (post-4.19 regression) (limited info so far, not yet bisected) Emacs: if it payed rent for disk space, you'd be rich. Date: Sat, 16 Feb 2019 16:26:30 +0000 Message-ID: <87o97bu2bt.fsf@esperi.org.uk> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-DCC-URT-Metrics: loom 1060; Body=3 Fuz1=3 Fuz2=3 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org So I just tried to connect up to my ancient Soekris firewall's serial console to try to bisect a problem where it stopped booting in 4.20, and found I couldn't. minicom says: minicom: cannot open /dev/ttyUSB0: Input/output error and in the dmesg we see [705576.028170] pl2303 ttyUSB0: failed to submit interrupt urb: -28 Booting to 4.19, everything works fine. (A random GalliumOS Chromebook running 4.9.4 works fine too, not that that confirmation is terribly useful.) This is an extremely preliminary report in case it's instantly obvious what's going on: I'll do enough investigation to produce an actually useful bug report, including bisecting this, after I've bisected the *other* non-booting bug, but that might not be until next weekend. (All this for a firewall I was trying to decommission! bah :) )