On 18/05/2023 09:44, Marek Szyprowski wrote:
> Commit adf8238ef403 ("ARM: dts: exynos: move exynos-bus nodes out of soc
> in Exynos4412") changed the order of the exynos-bus nodes, what results
> in different probe order of the Exynos Bus devices. Although the driver
> properly handles the deferred probe and all devices seems to be finally
> properly registered, this change revealed some kind of a bug related to
> PPMU counters registration and passive governor operation. Usually in 1
> of 10 boots this results in complete board freeze during loading of the
> kernel modules.
>
> To avoid that freeze, ensure that the Exynos PPMU driver is already
> loaded before the Exynos Bus driver starts probing.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Best regards,
Krzysztof
