RE: [PATCH] x86: Fix interrupt leak due to migration

[Brandeburg, Jesse]

Matthew Wilcox wrote:
> When we migrate an interrupt from one CPU to another, we set the
> move_in_progress flag and clean up the vectors later once they're not
> being used.  If you're unlucky and call destroy_irq() before the
> vectors become un-used, the move_in_progress flag is never cleared,
> which causes the interrupt to become unusable.
> 
> This was discovered by Jesse Brandeburg for whom it manifested as an
> MSI-X device refusing to use MSI-X mode when the driver was unloaded
> and reloaded repeatedly.
> 
> Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>

We did some other quick testing on this and it seems good.  Thanks 
and good work Matthew!

Acked-by: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>
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