From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Tom Cook <tom.k.cook@gmail.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
linux-rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: Tracers+cyclictest causing kernel oops
Date: Tue, 28 May 2013 08:53:37 +0200 [thread overview]
Message-ID: <20130528065336.GI11166@pengutronix.de> (raw)
In-Reply-To: <CAFSh4Uw2+d_mOoY0b63JODwjXnq=H0oZia1XMEDW6KXV87NR5Q@mail.gmail.com>
On Mon, May 27, 2013 at 10:23:53PM +0100, Tom Cook wrote:
> On Mon, May 27, 2013 at 9:02 AM, Uwe Kleine-König
> <u.kleine-koenig@pengutronix.de> wrote:
> [snip]
> > What are you using fiqs for? AFAIK they are not well supported in
> > mainline Linux even.
>
> You're well on the way to plumbing the depths of my ignorance. This
> is just me applying the RT patches to the raspberrypi linux tree. The
> nearest I can figure out an answer to your question is this, in
> arch/arm/kernel/fiqasm.S, in __set_fiq_regs:
>
> @@@@@@@@@@@@@@@ hack: enable the fiq here to keep usb driver happy
> and r1, #~PSR_F_BIT
> @@@@@@@@@@@@@@@ endhack: (need to find better place for this to happen)
IIRC the usb driver is vital for the raspberry pi, but can you try to
unbind the driver before enabling whatever breaks for you?
Something like:
cd /sys/bus/platform/drivers/dwc_otg
in this directory are probably >=1 symlinks on devices. Do
echo $devicename > unbind
for each of them where devicename is the name of the symlinks.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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next prev parent reply other threads:[~2013-05-28 6:53 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-26 8:04 Tracers+cyclictest causing kernel oops Tom Cook
2013-04-29 7:16 ` Tom Cook
2013-05-03 16:05 ` Sebastian Andrzej Siewior
2013-05-12 5:14 ` Tom Cook
[not found] ` <CAFSh4UwD5yyJrtKwUaOX-uiUuzVf7YaDbM4vbZ1EFZBf6F1JHg@mail.gmail.com>
2013-05-21 11:16 ` Sebastian Andrzej Siewior
2013-05-21 15:20 ` Tom Cook
2013-05-27 8:02 ` Uwe Kleine-König
2013-05-27 21:23 ` Tom Cook
2013-05-28 6:53 ` Uwe Kleine-König [this message]
2013-06-21 11:01 ` Tom Cook
2013-05-31 9:23 ` Sebastian Andrzej Siewior
2013-05-31 9:31 ` Tom Cook
2013-06-21 11:21 ` Tom Cook
2013-06-21 14:17 ` Tom Cook
2013-06-21 14:58 ` Tom Cook
2013-06-21 15:00 ` Sebastian Andrzej Siewior
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