From b6c10c84665912985d0bf9b6ae8ce19fc4298d9f Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 12 Jul 2011 00:39:21 +0200 Subject: [PATCH] PM / Domains: Make failing pm_genpd_prepare() clean up properly If pm_generic_prepare() in pm_genpd_prepare() returns error code, the PM domains counter of "prepared" devices should be decremented and its suspend_power_off flag should be reset if this counter drops down to zero. Otherwise, the PM domain runtime PM code will not handle the domain correctly (it will permanently think that system suspend is in progress). Signed-off-by: Rafael J. Wysocki --- drivers/base/power/domain.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 0e7e91baec1d..9a20d9302fcd 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -367,6 +367,7 @@ static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd) static int pm_genpd_prepare(struct device *dev) { struct generic_pm_domain *genpd; + int ret; dev_dbg(dev, "%s()\n", __func__); @@ -400,7 +401,16 @@ static int pm_genpd_prepare(struct device *dev) mutex_unlock(&genpd->lock); - return pm_generic_prepare(dev); + ret = pm_generic_prepare(dev); + if (ret) { + mutex_lock(&genpd->lock); + + if (--genpd->prepared_count == 0) + genpd->suspend_power_off = false; + + mutex_unlock(&genpd->lock); + } + return ret; } /**