linux-kernel - Re: i915_driver_irq_handler: irq 42: nobody cared [generic IRQ handling broken?]

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Date:	Tue, 10 Apr 2012 10:44:19 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Chris Wilson <chris@...is-wilson.co.uk>,
	Jiri Slaby <jirislaby@...il.com>,
	Keith Packard <keithp@...thp.com>,
	dri-devel@...ts.freedesktop.org,
	LKML <linux-kernel@...r.kernel.org>, daniel@...ll.ch
Subject: Re: i915_driver_irq_handler: irq 42: nobody cared [generic IRQ handling
 broken?]

On 04/07/2012 12:40 AM, Thomas Gleixner wrote:
> On Fri, 6 Apr 2012, Jiri Slaby wrote:
>> It very looks like the generic IRQ handling code is broken. Like it
>> frees/corrupts irq_desc and ...
> 
> OMG, your problem analyzing skills are amazing.

Hehe, no I did *no* analysis. I stand here as a bug reporter.

> What the heck makes you assume that the irq core code is broken?  Core
> code, which works on a gazillion of machines and different device
> drivers and does not corrupt anything except that i915 thingy?

Note that this is a -next regression. And i915 graphics used. This
definitely doesn't run on a gazillion of machines.

> If you're still convinced that the irq core is messing with your
> device string,

Nope, thanks for the input.

-- 
js
suse labs


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