Re: [Xen-devel] [PATCH] x86/vtd: Fix S3 resume following c/s 650c31d3af

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Andrew Cooper [mailto:andrew.cooper3@xxxxxxxxxx]
> Sent: Tuesday, August 13, 2019 1:17 AM
> 
> c/s 650c31d3af "x86/IRQ: fix locking around vector management" adjusted
> the
> locking in adjust_irq_affinity().
> 
> The S3 path ends up here via iommu_resume() before interrupts are enabled,
> at
> which point spin_lock_irq() which fail ASSERT(local_irq_is_enabled()); but
> with no working console.
> 
> Use spin_lock_irqsave() instead to cope with interrupts already being
> disabled.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
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