Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761302AbXKUPBO (ORCPT ); Wed, 21 Nov 2007 10:01:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752051AbXKUPA6 (ORCPT ); Wed, 21 Nov 2007 10:00:58 -0500 Received: from ns1.siteground211.com ([209.62.36.12]:52975 "EHLO serv01.siteground211.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750797AbXKUPA6 (ORCPT ); Wed, 21 Nov 2007 10:00:58 -0500 MIME-Version: 1.0 Date: Wed, 21 Nov 2007 09:00:54 -0600 From: Felipe Balbi To: Markus Rechberger Cc: Oliver Neukum , Mark Lord , linux-kernel@vger.kernel.org, linux-usb-devel@lists.sourceforge.net, Laurent Pinchart Subject: Re: USB deadlock after resume In-Reply-To: References: Message-ID: <66fdea0c64df0b5203e0d9ff96afa66e@felipebalbi.com> User-Agent: FelipeBalbi.com Webmail Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - serv01.siteground211.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - felipebalbi.com Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3277 Lines: 91 On Wed, 21 Nov 2007 15:52:37 +0100, "Markus Rechberger" wrote: > On 11/21/07, Markus Rechberger wrote: >> On 11/21/07, Markus Rechberger wrote: >> > On 11/21/07, Oliver Neukum wrote: >> > > Am Mittwoch 21 November 2007 schrieb Markus Rechberger: >> > > > On 11/21/07, Markus Rechberger wrote: >> > > > > On 11/21/07, Mark Lord wrote: >> > > > > > Markus Rechberger wrote: >> > > > > > > Hi, >> > > > > > > >> > > > > > > I'm looking at the linux uvc driver, and noticed after > resuming >> my >> > > > > > .. >> > > > > > >> > > > > > Pardon me.. what is the "uvc" driver? Which module/source > file is >> > > that? >> > > > > > >> > > > > >> > > > > http://linux-uvc.berlios.de/ it's not yet included in the kernel >> > > > > sources although many distributions already ship it. >> > > > > A "dry" run putting the device into sleep mode works fine (I > added a >> > > > > proc interface for calling those suspend/resume function). >> > > > > >> > > > >> > > > it's not just usb_set_interface that hangs actually. >> > > > It seems to hang at >> > > > >> > > > wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0); >> > > > >> > > > in drivers/usb/core/urb.c after resuming. I disabled access to the > usb >> > > > subsystem in the uvc driver, although connecting any other usb > storage >> > > > fails too, just at the same point. >> > > >> > > Which URB is usb_kill_urb() called for? >> > > >> > >> > it's the usb_control_message which calls usb_kill_urb if I haven't got >> > it wrong. (if you're looking for some other information please let me >> > know) >> > Although, I got a bit further with it. The error seems to happen >> > earlier already. >> > If I load the driver, and do not access the device after suspending >> > all usb_control commands fail with -71 eproto. >> > >> > Reloading the driver doesn't help at tht point, only reconnecting the >> > device does. >> > >> > The data is transfered using bulk transfer. >> > >> >> Do you know any good way for performing a softreset within the driver? >> The video application should get a continuous datastream after >> resuming the notebook, so the driver shouldn't be unloaded. >> The driver also keeps a list of previous camera settings which should >> be set up again after resuming. Stopping the video application and >> reattaching the device using ACPI (this board supports reconnecting >> the device using ACPI) should be avoided. >> > > ok usb_reset_device() did the job after resuming. First problem solved. hmm... in that case try setting in quirks USB_QUIRK_RESET_RESUME > > Markus > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Best Regards, Felipe Balbi http://felipebalbi.com me@felipebalbi.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/