Re: [PATCH] uio/gen-pci: don't enable interrupts in ISR

From: Sebastian Andrzej Siewior
Date: Tue Aug 09 2011 - 07:43:54 EST

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?

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