From: David Brownell <david-b@pacbell.net>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Christian Kujau <lists@nerdbynature.de>,
LKML <linux-kernel@vger.kernel.org>,
0x0007@gmail.com, USB list <linux-usb@vger.kernel.org>
Subject: Re: WARNING: at drivers/usb/host/ehci-hcd.c:287
Date: Tue, 4 Mar 2008 12:51:06 -0800 [thread overview]
Message-ID: <200803041251.06725.david-b@pacbell.net> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0803041118100.4039-100000@iolanthe.rowland.org>
On Tuesday 04 March 2008, Alan Stern wrote:
> Dave, it seems to me that this must be an example of a race between the
> iaa watchdog timer expiring and end_unlink_async() running. It's not
> good enough for end_unlink_async() to call iaa_watchdog_done(), because
> on an SMP system the timer may already have fired and the watchdog
> routine may be spinning on ehci->lock.
Right.
> How about replacing the
>
> WARN_ON(!ehci->reclaim);
Or bettter yet, just removing it entirely. ISTR doing that in some
patches I've not yet sent for merging, and expect that's what my
preferred fix will be ...
- Dave
next prev parent reply other threads:[~2008-03-04 20:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-03 0:05 Christian Kujau
2008-03-03 22:38 ` Christian Kujau
2008-03-04 16:29 ` Alan Stern
2008-03-04 18:53 ` Christian Kujau
2008-03-04 20:27 ` Alan Stern
2008-03-04 20:51 ` David Brownell [this message]
2008-03-04 20:57 ` Alan Stern
2008-03-04 22:01 ` David Brownell
2008-03-04 23:15 ` Christian Kujau
2008-03-05 0:30 ` David Brownell
2008-03-05 1:15 ` Christian Kujau
2008-03-05 4:25 ` David Brownell
2008-03-05 22:59 ` Christian Kujau
2008-03-07 19:51 ` Christian Kujau
2008-03-04 7:49 ` Andrew Morton
2008-03-04 8:01 ` Christian Kujau
2008-03-04 8:10 ` Andrew Morton
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