Input: serio - offload resume to kseriod
When resuming AUX ports psmouse driver calls psmouse_extensions()
to determine if the attached mouse is still the same, which may take
a while to complete for generic mice. Offload the resume process to
kseriod so the rest of the system may continue resuming without
waiting for the mouse.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c
index 78f2abb..2f12d60 100644
--- a/drivers/input/serio/serio.c
+++ b/drivers/input/serio/serio.c
@@ -63,8 +63,9 @@
static struct bus_type serio_bus;
static void serio_add_port(struct serio *serio);
-static void serio_reconnect_port(struct serio *serio);
+static int serio_reconnect_port(struct serio *serio);
static void serio_disconnect_port(struct serio *serio);
+static void serio_reconnect_chain(struct serio *serio);
static void serio_attach_driver(struct serio_driver *drv);
static int serio_connect_driver(struct serio *serio, struct serio_driver *drv)
@@ -161,6 +162,7 @@
enum serio_event_type {
SERIO_RESCAN_PORT,
SERIO_RECONNECT_PORT,
+ SERIO_RECONNECT_CHAIN,
SERIO_REGISTER_PORT,
SERIO_ATTACH_DRIVER,
};
@@ -315,6 +317,10 @@
serio_find_driver(event->object);
break;
+ case SERIO_RECONNECT_CHAIN:
+ serio_reconnect_chain(event->object);
+ break;
+
case SERIO_ATTACH_DRIVER:
serio_attach_driver(event->object);
break;
@@ -470,7 +476,7 @@
if (!strncmp(buf, "none", count)) {
serio_disconnect_port(serio);
} else if (!strncmp(buf, "reconnect", count)) {
- serio_reconnect_port(serio);
+ serio_reconnect_chain(serio);
} else if (!strncmp(buf, "rescan", count)) {
serio_disconnect_port(serio);
serio_find_driver(serio);
@@ -620,14 +626,30 @@
}
/*
+ * Reconnect serio port (re-initialize attached device).
+ * If reconnect fails (old device is no longer attached or
+ * there was no device to begin with) we do full rescan in
+ * hope of finding a driver for the port.
+ */
+static int serio_reconnect_port(struct serio *serio)
+{
+ int error = serio_reconnect_driver(serio);
+
+ if (error) {
+ serio_disconnect_port(serio);
+ serio_find_driver(serio);
+ }
+
+ return error;
+}
+
+/*
* Reconnect serio port and all its children (re-initialize attached devices)
*/
-static void serio_reconnect_port(struct serio *serio)
+static void serio_reconnect_chain(struct serio *serio)
{
do {
- if (serio_reconnect_driver(serio)) {
- serio_disconnect_port(serio);
- serio_find_driver(serio);
+ if (serio_reconnect_port(serio)) {
/* Ok, old children are now gone, we are done */
break;
}
@@ -673,7 +695,7 @@
void serio_reconnect(struct serio *serio)
{
- serio_queue_event(serio, NULL, SERIO_RECONNECT_PORT);
+ serio_queue_event(serio, NULL, SERIO_RECONNECT_CHAIN);
}
/*
@@ -927,19 +949,16 @@
static int serio_resume(struct device *dev)
{
- struct serio *serio = to_serio_port(dev);
-
- 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.
- */
- serio_rescan(serio);
+ /*
+ * Driver reconnect can take a while, so better let kseriod
+ * deal with it.
+ */
+ if (dev->power.power_state.event != PM_EVENT_ON) {
+ dev->power.power_state = PMSG_ON;
+ serio_queue_event(to_serio_port(dev), NULL,
+ SERIO_RECONNECT_PORT);
}
- dev->power.power_state = PMSG_ON;
-
return 0;
}
#endif /* CONFIG_PM */