ARM / shmobile: Use genpd_queue_power_off_work()

Make pd_power_down_a3rv() use genpd_queue_power_off_work() to queue
up the powering off of the A4LC domain to avoid queuing it up when
it is pending.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>

arch/arm/mach-shmobile/pm-sh7372.c

@@ -107,7 +107,7 @@ static int pd_power_down_a3rv(struct generic_pm_domain *genpd)
 
 	/* try to power down A4LC after A3RV is requested off */
 	pm_genpd_poweron(&sh7372_a4lc.genpd);
-	queue_work(pm_wq, &sh7372_a4lc.genpd.power_off_work);
+	genpd_queue_power_off_work(&sh7372_a4lc.genpd);
 
 	return ret;
 }

drivers/base/power/domain.c

@@ -222,7 +222,7 @@ static bool genpd_abort_poweroff(struct generic_pm_domain *genpd)
  * Queue up the execution of pm_genpd_poweroff() unless it's already been done
  * before.
  */
-static void genpd_queue_power_off_work(struct generic_pm_domain *genpd)
+void genpd_queue_power_off_work(struct generic_pm_domain *genpd)
 {
 	if (!work_pending(&genpd->power_off_work))
 		queue_work(pm_wq, &genpd->power_off_work);

include/linux/pm_domain.h

@@ -73,6 +73,7 @@ extern void pm_genpd_init(struct generic_pm_domain *genpd,
 			  struct dev_power_governor *gov, bool is_off);
 extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
 extern void pm_genpd_poweroff_unused(void);
+extern void genpd_queue_power_off_work(struct generic_pm_domain *genpd);
 #else
 static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
 				      struct device *dev)
@@ -101,6 +102,7 @@ static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
 	return -ENOSYS;
 }
 static inline void pm_genpd_poweroff_unused(void) {}
+static inline void genpd_queue_power_off_work(struct generic_pm_domain *gpd) {}
 #endif
 
 #endif /* _LINUX_PM_DOMAIN_H */