linux-kernel - Re: 2.6.30-rc1: touchscreen BUG() on spitz

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Date:	Fri, 10 Apr 2009 23:35:04 +0400
From:	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Daniel Ribeiro <drwyrm@...il.com>,
	Eric Miao <eric.y.miao@...il.com>, rpurdie@...ys.net,
	lenz@...wisc.edu, kernel list <linux-kernel@...r.kernel.org>,
	Russell King <rmk@....linux.org.uk>, Dirk@...er-online.de,
	arminlitzel@....de, Cyril Hrubis <metan@....cz>,
	thommycheck@...il.com,
	linux-arm-kernel <linux-arm-kernel@...ts.arm.linux.org.uk>,
	omegamoon@...il.com, Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: 2.6.30-rc1: touchscreen BUG() on spitz

2009/4/10 Pavel Machek <pavel@....cz>:
> Hi!
>
>> > > After update to 2.6.30-rc1, sharp zaurus c-3000 fails to boot with
>> > > white screen (with stripes). That's a regression w.r.t. 2.6.29.
>> >
>> > What kind of white stripes? Does it look like the LCD controller
>> > stops working or something.
>> >
>> > There is a regression which caused X server hang during bootup,
>> > with commit id 66c1ca0, which you can revert and have another
>> > try.
>>
>> As spitz also use cs_control for pxa2xx_spi, i believe that this is the
>> same issue i found wednesday.
>>
>> See the "Kernel freeze caused by
>> a7bb3909b3293d503211d7f6af8ed62c1644b686" thread.
>
> Ok, I'll try changing ASSERT->DEASSERT and see what happens. Hmm, it
> now boots, with these messages:
>
> WARNING: at kernel/irq/handle.c:366
> BUG: IRQ handler called from non-hardirq context!
>
> just after loading touchscreen device.

Try reverting 044d408409cc4e1bc75c886e27ca85c270db104c as
software resent IRQs are sent from tasklet context, not from hardirq.

-- 
With best wishes
Dmitry
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