From: Alan Stern <stern@rowland.harvard.edu>
To: Anssi Hannula <anssi.hannula@iki.fi>
Cc: Oliver Neukum <oliver@neukum.org>,
Matthew Garrett <mjg59@srcf.ucam.org>, <dvomlehn@cisco.com>,
<gregkh@suse.de>, <linux-usb@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [REGRESSION] "USB: use kfifo to buffer usb-generic serial writes" causes gobi_loader to hang
Date: Mon, 22 Feb 2010 10:28:36 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1002221013480.1656-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <201002220121.53882.anssi.hannula@iki.fi>
On Mon, 22 Feb 2010, Anssi Hannula wrote:
> > > If I additionally insert a one-second delay before the fd is closed, I
> > > get this usbmon log:
> > > http://stuff.onse.fi/gobi2000/gobi-regression5.mon.log
> > >
> > > The firmware upload is still unsuccessful.
> >
> > If I use the option driver instead of qcserial, the firmware upload is
> > always successful (without any added delays needed). The usbmon log for
> > that case can be found here:
> > http://stuff.onse.fi/gobi2000/gobi-regression6.mon.log
>
> I installed 2.6.31.12 to get a usbmon log with qcserial before the regression
> as well (without delays, upload successful):
> http://stuff.onse.fi/gobi2000/gobi-regression7.mon.log
The major difference between the logs is in the way the data get
divided up into packets. In both the successful logs, there are
sequences of bulk-OUT packets with lengths like:
44, 1, 15, 1, 13
where the unsuccessful transfer just has a single packet of length 74.
Also, the successful transfers show a lot of bulk-IN traffic where the
unsuccessful transfer doesn't have any. I don't know if that is
relevant, however.
No other differences stand out.
Alan Stern
next prev parent reply other threads:[~2010-02-22 15:28 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-17 2:55 [REGRESSION] "USB: use kfifo to buffer usb-generic serial writes" causes gobi_loader to hang Matthew Garrett
2010-01-17 8:13 ` Marcel Holtmann
2010-01-17 9:14 ` Oliver Neukum
2010-01-18 1:58 ` Matthew Garrett
2010-01-18 17:25 ` Oliver Neukum
2010-01-18 20:14 ` Matthew Garrett
2010-01-19 13:20 ` Oliver Neukum
2010-01-19 13:29 ` Alan Cox
2010-01-19 13:57 ` Oliver Neukum
2010-01-19 14:21 ` Alan Cox
2010-01-19 15:15 ` Oliver Neukum
2010-01-19 14:26 ` Alan Cox
2010-01-19 15:25 ` Johan Hovold
2010-01-19 15:52 ` Johan Hovold
2010-01-19 16:27 ` Alan Cox
2010-01-19 18:44 ` Oliver Neukum
2010-01-19 19:45 ` Johan Hovold
2010-01-28 17:45 ` Greg KH
2010-01-28 18:40 ` Oliver Neukum
2010-01-28 22:32 ` Greg KH
2010-02-03 16:46 ` Matthew Garrett
2010-02-03 17:21 ` Oliver Neukum
2010-02-03 22:37 ` Matthew Garrett
2010-02-03 22:58 ` Oliver Neukum
2010-02-05 19:58 ` Matthew Garrett
2010-02-05 21:35 ` Matthew Garrett
2010-02-08 19:00 ` Oliver Neukum
2010-02-05 21:59 ` Oliver Neukum
2010-02-13 2:09 ` Anssi Hannula
2010-02-13 2:50 ` Alan Stern
2010-02-13 7:11 ` Oliver Neukum
2010-02-13 13:35 ` Anssi Hannula
2010-02-13 19:01 ` Anssi Hannula
2010-02-15 13:08 ` Oliver Neukum
2010-02-20 16:03 ` Anssi Hannula
2010-02-20 18:19 ` Oliver Neukum
2010-02-21 21:28 ` Alan Stern
2010-02-21 21:42 ` Anssi Hannula
2010-02-21 22:12 ` Oliver Neukum
2010-02-21 23:06 ` Anssi Hannula
2010-02-21 23:13 ` Anssi Hannula
2010-02-21 23:21 ` Anssi Hannula
2010-02-22 15:28 ` Alan Stern [this message]
2010-02-22 18:35 ` Anssi Hannula
2010-02-22 19:10 ` Alan Stern
2010-02-22 19:14 ` Matthew Garrett
2010-02-22 20:12 ` Alan Stern
2010-02-24 2:33 ` Anssi Hannula
2010-02-22 19:24 ` Anssi Hannula
2010-02-22 20:10 ` Alan Stern
2010-02-22 21:24 ` Alan Cox
2010-02-22 21:23 ` Matthew Garrett
2010-02-22 23:26 ` Oliver Neukum
2010-02-23 1:55 ` Anssi Hannula
2010-02-21 22:09 ` Oliver Neukum
2010-02-21 21:37 ` Anssi Hannula
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Pine.LNX.4.44L0.1002221013480.1656-100000@iolanthe.rowland.org \
--to=stern@rowland.harvard.edu \
--cc=anssi.hannula@iki.fi \
--cc=dvomlehn@cisco.com \
--cc=gregkh@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=mjg59@srcf.ucam.org \
--cc=oliver@neukum.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).