From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932498Ab0BGW6N (ORCPT ); Sun, 7 Feb 2010 17:58:13 -0500 Received: from smtp-out003.kontent.com ([81.88.40.217]:46617 "EHLO smtp-out003.kontent.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756341Ab0BGW6G (ORCPT ); Sun, 7 Feb 2010 17:58:06 -0500 From: Oliver Neukum To: Matthew Garrett Subject: Re: [REGRESSION] "USB: use kfifo to buffer usb-generic serial writes" causes gobi_loader to hang Date: Fri, 5 Feb 2010 22:59:33 +0100 User-Agent: KMail/1.12.2 (Linux/2.6.33-rc6-0.1-default; KDE/4.3.1; x86_64; ; ) Cc: dvomlehn@cisco.com, gregkh@suse.de, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org References: <20100117025535.GB7045@srcf.ucam.org> <201002032358.03552.oliver@neukum.org> <20100205195817.GA14285@srcf.ucam.org> In-Reply-To: <20100205195817.GA14285@srcf.ucam.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201002052259.33645.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Freitag, 5. Februar 2010 20:58:17 schrieb Matthew Garrett: > drivers/usb/serial/usb-serial.c: usb_serial_port_work - port 0 > drivers/usb/serial/usb-serial.c: serial_write - port 0, 2048 byte(s) > drivers/usb/serial/generic.c: usb_serial_generic_write - port 0, 2048 bytes > drivers/usb/serial/generic.c: usb_serial_generic_write - put 512 bytes into fifo > drivers/usb/serial/usb-serial.c: serial_write - port 0, 1536 byte(s) > drivers/usb/serial/generic.c: usb_serial_generic_write - port 0, 1536 bytes > drivers/usb/serial/generic.c: usb_serial_generic_write - put 0 bytes into fifo > drivers/usb/serial/generic.c: usb_serial_generic_write - FIFO is full OK, could you also get an usbmon trace? This would allow a determination whether the submitted URB doesn't finish for some reason, or whether no URB is submitted, possibly because a wakeup is missed. Regards Oliver