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If a domain has not been used through runtime PM, its boot performance floor may not have been applied when genpd_sync_power_on() enables it during resume-noirq. Prepare boot performance floors from genpd_prepare(), where performance callbacks may sleep. Walk the parent hierarchy even when the device's own domain has no boot floor: a parent without direct consumers would otherwise miss preparation entirely. Take parent locks in the existing child-to-parent order and propagate preparation failures to the PM core. Also retain boot power protection in genpd_sync_power_off() for domains with a boot performance floor. This prevents the system-sleep path from withdrawing their power vote while boot protection remains active. Keep performance programming out of resume-noirq. Domains with their floor already satisfied do not need another performance update, and no floor is imposed after sync_state() releases boot protection. Assisted-by: LLM Signed-off-by: Abel Vesa --- drivers/pmdomain/core.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c index 6f2b406ce049..4ff55175d899 100644 --- a/drivers/pmdomain/core.c +++ b/drivers/pmdomain/core.c @@ -1538,7 +1538,9 @@ static void genpd_sync_power_off(struct generic_pm_domain *genpd, bool use_lock, { struct gpd_link *link; - if (!genpd_status_on_unlocked(genpd) || genpd_is_always_on(genpd)) + if (!genpd_status_on_unlocked(genpd) || genpd_is_always_on(genpd) || + (genpd_is_power_unknown(genpd) && genpd->stay_on && + genpd->boot_performance_state)) return; if (genpd->suspended_count != genpd->device_count @@ -1623,6 +1625,31 @@ static void genpd_sync_power_on(struct generic_pm_domain *genpd, bool use_lock, genpd->status = GENPD_STATE_ON; } +/* Called with the domain lock held, before entering noirq. */ +static int genpd_prepare_boot_performance(struct generic_pm_domain *genpd, + unsigned int depth) +{ + struct gpd_link *link; + int ret; + + /* Parents may need a boot floor even when this domain does not. */ + list_for_each_entry(link, &genpd->child_links, child_node) { + struct generic_pm_domain *parent = link->parent; + + genpd_lock_nested(parent, depth + 1); + ret = genpd_prepare_boot_performance(parent, depth + 1); + genpd_unlock(parent); + if (ret) + return ret; + } + + if (genpd_needs_boot_performance_state(genpd)) + return _genpd_set_performance_state(genpd, + genpd->performance_state, depth); + + return 0; +} + /** * genpd_prepare - Start power transition of a device in a PM domain. * @dev: Device to start the transition of. @@ -1644,6 +1671,12 @@ static int genpd_prepare(struct device *dev) return -EINVAL; genpd_lock(genpd); + /* Performance callbacks may sleep; prepare the hierarchy before noirq. */ + ret = genpd_prepare_boot_performance(genpd, 0); + if (ret) { + genpd_unlock(genpd); + return ret; + } genpd->prepared_count++; genpd_unlock(genpd); -- 2.54.0