Re: [PATCH 2/3] msi: Fixup the msi enable/disable logic

[Eric W. Biederman]

Michael Ellerman <michael@xxxxxxxxxxxxxx> writes:

>
> Hi Eric, comments below ..
>
>
> I get the reasoning for disabling MSI before we start writing back the
> config space, but don't we want to re-enable MSI on the way out?

We are restoring the entire msi flags register which includes the enable bit,
setting it a second time is gratuitous.

In addition if we are restoring the register when the enable bit is not set.
(because we don't have a mask bit) enabling the msi state is actually
the wrong thing to do.    But I admit that case can only happen after
the additions in my last patch.

Eric

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