linux-kernel - Re: [patch] ohci1394: don't leave interrupts enabled during suspend/resume

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Message-ID: <493C1C8F.5070003@shaw.ca>
Date:	Sun, 07 Dec 2008 12:57:19 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
CC:	Frans Pop <elendil@...net.nl>, "Rafael J. Wysocki" <rjw@...k.pl>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [patch] ohci1394: don't leave interrupts enabled during suspend/resume

Stefan Richter wrote:
> Robert Hancock wrote:
>> Stefan Richter wrote:
>>>     reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff);
>>>
>>> in ohci1394's .suspend() switches interrupts off.
>> Presumably it should.. but the fact remains that if free_irq helps
>> anything, then the device must be generating interrupts for some reason,
> 
> Or another device:
> http://www.gossamer-threads.com/lists/linux/kernel/896053
> 
> Questions for Frans, quoting tglx:
> Do you have CONFIG_NET_POLL_CONTROLLER enabled in your .config?  If yes,
> can you please disable it and check whether the problem persists?

Hmm, that case sounds like disable_irq on an MSI device redirecting the 
interrupts to the legacy INTx interrupt instead of actually disabling 
them? If this is what's happening here, then that's the bug..
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