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Date: Wed, 28 Sep 2005 15:04:09 -0700
From: David Brownell <david-b@pacbell.net>
To: rjw@sisk.pl
Subject: Re: [linux-usb-devel] Re: 2.6.13-mm2
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       linux-kernel@vger.kernel.org, hugh@veritas.com, daniel.ritz@gmx.ch,
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> > My other point still stands though.  The IRQ for all HCDs _are_ freed
> > on suspend, and re-requested on resume ... so lack of such free/request
> > calls can't possibly be an issue.
>
> Yes it can.  Apparently on my box the call to request_irq() from a USB HCD
> driver (OHCI or EHCI) causes a screaming interrupt to be generated,
> which kills any other driver that shares the IRQ with the USB and has not
> called free_irq() on suspend.

So it's as I said:  _lack_ of such calls can't be an issue.

So _which_ device is generating this IRQ??


>	Of course this only happens with the patch
> at http://www.ussg.iu.edu/hypermail/linux/kernel/0507.3/2234.html
> unapplied, as it masks the problem.

Hmm, an ACPI patch.  With tabs completely trashed; that
mail archive needs to learn about <pre>...</pre.  :(


>		Actually it also depends on the
> order in which the drivers' resume routines are called, but unfortunately
> on my box the USB drivers' are called first.

Suggesting that the issue comes from the non-USB driver
sharing that IRQ line...

- Dave

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