From: "Zephaniah E. Hull" <warp@babylon.d2dc.net>
To: linux-kernel@vger.kernel.org
Cc: Greg KH <greg@kroah.com>, "David A. Desrosiers" <desrod@gnu-designs.com>
Subject: USBDEVFS_RESET deadlocks USB bus.
Date: Fri, 4 Jun 2004 15:39:11 -0400 [thread overview]
Message-ID: <20040604193911.GA3261@babylon.d2dc.net> (raw)
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Starting at 2.6.7-rc1 or so (that is when we first noticed it) the new
pilot-link libusb back end started deadlocking the entire USB bus that
the palm device was on.
I have finally tracked it down to happening when we make the
USBDEVFS_RESET ioctl, we never return from it and from that point on the
bus in question is completely dead, no processing is done, no
notifications of devices being plugged in or unplugged.
This is still happening in 2.6.7-rc2-mm1.
It seems to happen with both the UHCI and OHCI back ends, so it is
probably above that.
Given that there were heavy locking changes, I suspect that the case in
question got screwed up somehow.
--
1024D/E65A7801 Zephaniah E. Hull <warp@babylon.d2dc.net>
92ED 94E4 B1E6 3624 226D 5727 4453 008B E65A 7801
CCs of replies from mailing lists are requested.
Perl == Being
-- Descartes (paraphrased).
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next reply other threads:[~2004-06-04 19:39 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-04 19:39 Zephaniah E. Hull [this message]
2004-06-04 19:52 ` USBDEVFS_RESET deadlocks USB bus Greg KH
2004-06-04 20:02 ` Zephaniah E. Hull
2004-06-04 20:05 ` Zephaniah E. Hull
2004-06-04 20:07 ` Greg KH
2004-06-04 20:28 ` David A. Desrosiers
2004-06-04 21:06 ` Zephaniah E. Hull
2004-06-04 20:40 ` [linux-usb-devel] " Duncan Sands
2004-06-04 21:30 ` Zephaniah E. Hull
2004-06-05 7:55 ` Duncan Sands
2004-06-06 6:35 ` Zephaniah E. Hull
2004-06-07 7:05 ` Duncan Sands
2004-06-07 15:43 ` Zephaniah E. Hull
2004-06-07 19:11 ` Duncan Sands
2004-06-07 23:13 ` Zephaniah E. Hull
2004-06-08 20:19 ` Duncan Sands
2004-06-18 20:02 ` Ian Morgan
2004-06-19 13:48 ` Duncan Sands
2004-07-02 20:47 ` Zephaniah E. Hull
2004-07-02 21:11 ` Alan Stern
2004-07-02 21:52 ` Zephaniah E. Hull
2004-07-03 8:28 ` Duncan Sands
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