Input: i8042 - let serio bus suspend ports

Let serio subsystem take care of suspending the ports; concentrate
on suspending/resuming the controller itself.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 35 insertions, 1 deletions

diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c
index 17c8c63cbe1..a15e531ec75 100644
--- a/drivers/input/serio/serio.c
+++ b/drivers/input/serio/serio.c
@@ -778,6 +778,19 @@ static int serio_driver_remove(struct device *dev)
         return 0;
 }
 
+static void serio_cleanup(struct serio *serio)
+{
+        if (serio->drv && serio->drv->cleanup)
+                serio->drv->cleanup(serio);
+}
+
+static void serio_shutdown(struct device *dev)
+{
+        struct serio *serio = to_serio_port(dev);
+
+        serio_cleanup(serio);
+}
+
 static void serio_attach_driver(struct serio_driver *drv)
 {
         int error;
@@ -910,11 +923,25 @@ static int serio_uevent(struct device *dev, char **envp, int num_envp, char *buf
 
 #endif /* CONFIG_HOTPLUG */
 
+#ifdef CONFIG_PM
+static int serio_suspend(struct device *dev, pm_message_t state)
+{
+        if (dev->power.power_state.event != state.event) {
+                if (state.event == PM_EVENT_SUSPEND)
+                        serio_cleanup(to_serio_port(dev));
+
+                dev->power.power_state = state;
+        }
+
+        return 0;
+}
+
 static int serio_resume(struct device *dev)
 {
         struct serio *serio = to_serio_port(dev);
 
-        if (serio_reconnect_driver(serio)) {
+        if (dev->power.power_state.event != PM_EVENT_ON &&
+            serio_reconnect_driver(serio)) {
                 /*
                  * Driver re-probing can take a while, so better let kseriod
                  * deal with it.
@@ -922,8 +949,11 @@ static int serio_resume(struct device *dev)
                 serio_rescan(serio);
         }
 
+        dev->power.power_state = PMSG_ON;
+
         return 0;
 }
+#endif /* CONFIG_PM */
 
 /* called from serio_driver->connect/disconnect methods under serio_mutex */
 int serio_open(struct serio *serio, struct serio_driver *drv)
@@ -974,7 +1004,11 @@ static struct bus_type serio_bus = {
         .uevent         = serio_uevent,
         .probe          = serio_driver_probe,
         .remove         = serio_driver_remove,
+        .shutdown       = serio_shutdown,
+#ifdef CONFIG_PM
+        .suspend        = serio_suspend,
         .resume         = serio_resume,
+#endif
 };
 
 static int __init serio_init(void)