diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/domain.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index b80379012840..e02ddf65bc43 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -170,16 +170,15 @@ static void genpd_queue_power_off_work(struct generic_pm_domain *genpd) queue_work(pm_wq, &genpd->power_off_work); } -static int genpd_poweron(struct generic_pm_domain *genpd); - /** * __genpd_poweron - Restore power to a given PM domain and its masters. * @genpd: PM domain to power up. + * @depth: nesting count for lockdep. * * Restore power to @genpd and all of its masters so that it is possible to * resume a device belonging to it. */ -static int __genpd_poweron(struct generic_pm_domain *genpd) +static int __genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth) { struct gpd_link *link; int ret = 0; @@ -194,11 +193,16 @@ static int __genpd_poweron(struct generic_pm_domain *genpd) * with it. */ list_for_each_entry(link, &genpd->slave_links, slave_node) { - genpd_sd_counter_inc(link->master); + struct generic_pm_domain *master = link->master; + + genpd_sd_counter_inc(master); + + mutex_lock_nested(&master->lock, depth + 1); + ret = __genpd_poweron(master, depth + 1); + mutex_unlock(&master->lock); - ret = genpd_poweron(link->master); if (ret) { - genpd_sd_counter_dec(link->master); + genpd_sd_counter_dec(master); goto err; } } @@ -230,11 +234,12 @@ static int genpd_poweron(struct generic_pm_domain *genpd) int ret; mutex_lock(&genpd->lock); - ret = __genpd_poweron(genpd); + ret = __genpd_poweron(genpd, 0); mutex_unlock(&genpd->lock); return ret; } + static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev) { return GENPD_DEV_CALLBACK(genpd, int, save_state, dev); @@ -482,7 +487,7 @@ static int pm_genpd_runtime_resume(struct device *dev) } mutex_lock(&genpd->lock); - ret = __genpd_poweron(genpd); + ret = __genpd_poweron(genpd, 0); mutex_unlock(&genpd->lock); if (ret) |