Re: [PATCH] perf/arm-smmuv3: Propagate errors from optional IRQ lookup

[Will Deacon]

On Sat, Oct 03, 2026 at 07:07:12AM +0700, Bui Duc Phuc wrote:
> > Not sure about this. If it's optional, why should we bail the probe if
> > we don't manage to get an irq? Surely it's better to continue without
> > the interrupt in that case?
> >
> 
> platform_get_irq_optional() returns -ENXIO when no IRQ is available.
> Other negative return values indicate errors, including -EPROBE_DEFER.
> In the case of -EPROBE_DEFER, we should propagate the error so that
> the probe can be retried later.

Thanks, The -EPROBE_DEFER case seems more compelling, so perhaps we should
check for the expliitly (because it won't fail the probe altogether)?

Will