From ccb69e228ea48f8ea1e4a7dfeedf501329a9fdf4 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Thu, 18 May 2023 09:44:03 +0200 Subject: [PATCH] PM / devfreq: exynos: add Exynos PPMU as a soft module dependency 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 Reviewed-by: Krzysztof Kozlowski Signed-off-by: Chanwoo Choi --- drivers/devfreq/exynos-bus.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c index 8841444..245898f 100644 --- a/drivers/devfreq/exynos-bus.c +++ b/drivers/devfreq/exynos-bus.c @@ -518,6 +518,7 @@ static struct platform_driver exynos_bus_platdrv = { }; module_platform_driver(exynos_bus_platdrv); +MODULE_SOFTDEP("pre: exynos_ppmu"); MODULE_DESCRIPTION("Generic Exynos Bus frequency driver"); MODULE_AUTHOR("Chanwoo Choi "); MODULE_LICENSE("GPL v2"); -- 2.7.4