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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 08879C433E0 for ; Thu, 28 May 2020 16:04:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE6F72071A for ; Thu, 28 May 2020 16:04:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404859AbgE1QEY (ORCPT ); Thu, 28 May 2020 12:04:24 -0400 Received: from netrider.rowland.org ([192.131.102.5]:39575 "HELO netrider.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S2404688AbgE1QEV (ORCPT ); Thu, 28 May 2020 12:04:21 -0400 Received: (qmail 14781 invoked by uid 1000); 28 May 2020 12:04:20 -0400 Date: Thu, 28 May 2020 12:04:20 -0400 From: Alan Stern To: Zebediah Figura Cc: Greg KH , usb-storage@lists.one-eyed-alien.net, linux-usb@vger.kernel.org Subject: Re: Bug 207877: ASMedia drive (174c:55aa) hangs in ioctl CDROM_DRIVE_STATUS when mounting a DVD Message-ID: <20200528160420.GA14188@rowland.harvard.edu> References: <7d0b20b9-4735-bbed-bb50-72764aefd6d8@codeweavers.com> <20200528075440.GA2881385@kroah.com> <465eaae3-fa60-f37e-1d62-c52236720798@codeweavers.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <465eaae3-fa60-f37e-1d62-c52236720798@codeweavers.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Thu, May 28, 2020 at 10:02:07AM -0500, Zebediah Figura wrote: > On 5/28/20 2:54 AM, Greg KH wrote: > > On Wed, May 27, 2020 at 11:23:13PM -0500, Zebediah Figura wrote: > > > Hello all, > > > > > > I was asked to report this bug here. There's more details in the bug report, > > > but it's been proposed that there's a deadlock between device_reset() in > > > scsiglue.c and usb_stor_control_thread(). > > > > What bug report where? Can you provide a link and the details here in > > the email? > > Oops, meant to link it and forgot. Sorry about that. > > https://bugzilla.kernel.org/show_bug.cgi?id=207877 This doesn't look like a deadlock to me, at least, not a deadlock involving the device reset code. Your next step should be to collect a usbmon trace showing what happens when the problem occurs. See the instructions in Documentation/usb/usbmon.rst. Alan Stern