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    SubjectRe: [PATCH v3 00/19] irqdomain: fix mapping race and clean up locking
    On Thu, Dec 15, 2022 at 05:31:24PM +0800, Hsin-Yi Wang wrote:
    > On Thu, Dec 15, 2022 at 5:22 PM Johan Hovold <johan+linaro@kernel.org> wrote:
    > >
    > > Parallel probing (e.g. due to asynchronous probing) of devices that
    > > share interrupts can currently result in two mappings for the same
    > > hardware interrupt to be created.
    > >
    > > This series fixes this mapping race and clean up the irqdomain locking
    > > so that in the end the global irq_domain_mutex is only used for managing
    > > the likewise global irq_domain_list, while domain operations (e.g.
    > > IRQ allocations) use per-domain (hierarchy) locking.

    > Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
    >
    > The series solves a race issue when having non-populated 2nd source
    > components that share the same irq on ARM devices:
    > Previously we would see
    > [ 0.476357] irq: type mismatch, failed to map hwirq-11 for pinctrl@10005000!
    > and the component failed to probe.

    Thanks again for testing. I just sent a v4 adding a couple of clarifying
    comments to the final patch.

    Johan

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