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Date: Tue, 09 Aug 2011 13:43:46 +0200
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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To: "Michael S. Tsirkin" <mst@redhat.com>
CC: Chris Wright <chrisw@redhat.com>, "Hans J. Koch" <hjk@hansjkoch.de>,
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Subject: Re: [PATCH] uio/gen-pci: don't enable interrupts in ISR
References: <20110804204606.GA19724@linutronix.de> <20110804210413.GA29222@redhat.com> <20110805191842.GA4224@linutronix.de> <20110808064050.GC5182@redhat.com>
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Michael S. Tsirkin wrote:
>> It seems to me that you could drop this "user block" thing
>> since you never change anything outside of this command register and it
>> does not stop the race.
> 
> I don't think so: if we did, we would lose userspace modifications to
> other bits such as io enable, and there's no way to guess what their
> values should be.

How so?

Sebastian