[PATCH 4.15 093/168] PM / domains: Dont skip drivers ->suspend|resume_noirq() callbacks

[Greg Kroah-Hartman]

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ulf Hansson <ulf.hans...@linaro.org>


[ Upstream commit a935424bb658f9ca37eb5e94119b857998341356 ]

Commit 10da65423fdb (PM / Domains: Call driver's noirq callbacks)
started to respect driver's noirq callbacks, but while doing that it
also introduced a few potential problems.

More precisely, in genpd_finish_suspend() and genpd_resume_noirq()
the noirq callbacks at the driver level should be invoked, no matter
of whether dev->power.wakeup_path is set or not.

Additionally, the commit in question also made genpd_resume_noirq()
to ignore the return value from pm_runtime_force_resume().

Let's fix both these issues!

Fixes: 10da65423fdb (PM / Domains: Call driver's noirq callbacks)
Signed-off-by: Ulf Hansson <ulf.hans...@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/base/power/domain.c |   30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1032,15 +1032,12 @@ static int genpd_prepare(struct device *
 static int genpd_finish_suspend(struct device *dev, bool poweroff)
 {
        struct generic_pm_domain *genpd;
-       int ret;
+       int ret = 0;
 
        genpd = dev_to_genpd(dev);
        if (IS_ERR(genpd))
                return -EINVAL;
 
-       if (dev->power.wakeup_path && genpd_is_active_wakeup(genpd))
-               return 0;
-
        if (poweroff)
                ret = pm_generic_poweroff_noirq(dev);
        else
@@ -1048,10 +1045,18 @@ static int genpd_finish_suspend(struct d
        if (ret)
                return ret;
 
+       if (dev->power.wakeup_path && genpd_is_active_wakeup(genpd))
+               return 0;
+
        if (genpd->dev_ops.stop && genpd->dev_ops.start) {
                ret = pm_runtime_force_suspend(dev);
-               if (ret)
+               if (ret) {
+                       if (poweroff)
+                               pm_generic_restore_noirq(dev);
+                       else
+                               pm_generic_resume_noirq(dev);
                        return ret;
+               }
        }
 
        genpd_lock(genpd);
@@ -1085,7 +1090,7 @@ static int genpd_suspend_noirq(struct de
 static int genpd_resume_noirq(struct device *dev)
 {
        struct generic_pm_domain *genpd;
-       int ret = 0;
+       int ret;
 
        dev_dbg(dev, "%s()\n", __func__);
 
@@ -1094,21 +1099,20 @@ static int genpd_resume_noirq(struct dev
                return -EINVAL;
 
        if (dev->power.wakeup_path && genpd_is_active_wakeup(genpd))
-               return 0;
+               return pm_generic_resume_noirq(dev);
 
        genpd_lock(genpd);
        genpd_sync_power_on(genpd, true, 0);
        genpd->suspended_count--;
        genpd_unlock(genpd);
 
-       if (genpd->dev_ops.stop && genpd->dev_ops.start)
+       if (genpd->dev_ops.stop && genpd->dev_ops.start) {
                ret = pm_runtime_force_resume(dev);
+               if (ret)
+                       return ret;
+       }
 
-       ret = pm_generic_resume_noirq(dev);
-       if (ret)
-               return ret;
-
-       return ret;
+       return pm_generic_resume_noirq(dev);
 }
 
 /**