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Date: Mon, 29 Aug 2011 11:34:13 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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Subject: Re: skipping locks, mutex_owned, usb
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on 26/08/2011 21:28 Andriy Gapon said the following:
> I do not see how internal state of kbd drivers is protected from races between
> interrupts and calls from upper layers.  The only possibility that I see is that
> kbd interrupt handlers do not directly change the driver state but rather "call
> back" into the driver via sckbdevent().

Errm, it was pointed out to me that INTR_MPSAFE flag is not passed to
bus_setup_intr() for those interrupts, so the interrupt handlers are executed
under the Giant

-- 
Andriy Gapon