From: Dmitry Torokhov <dtor_core@ameritech.net>
Date: Sun, 20 Nov 2005 05:56:43 +0000 (-0500)
Subject: Input: make serio and gameport more swsusp friendly
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9e50afd0cb3ff9ee152dbcf8601f5fb7eba5cff8;p=linux-beck.git

Input: make serio and gameport more swsusp friendly

kseriod and kgameportd used to process all pending events before
checking for freeze condition. This may cause swsusp to time out
while stopping tasks when resuming. Switch to process events one
by one to check freeze status more often.

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

diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
index 0506934244f0..caac6d63d46f 100644
--- a/drivers/input/gameport/gameport.c
+++ b/drivers/input/gameport/gameport.c
@@ -339,14 +339,20 @@ static struct gameport_event *gameport_get_event(void)
 	return event;
 }
 
-static void gameport_handle_events(void)
+static void gameport_handle_event(void)
 {
 	struct gameport_event *event;
 	struct gameport_driver *gameport_drv;
 
 	down(&gameport_sem);
 
-	while ((event = gameport_get_event())) {
+	/*
+	 * Note that we handle only one event here to give swsusp
+	 * a chance to freeze kgameportd thread. Gameport events
+	 * should be pretty rare so we are not concerned about
+	 * taking performance hit.
+	 */
+	if ((event = gameport_get_event())) {
 
 		switch (event->type) {
 			case GAMEPORT_REGISTER_PORT:
@@ -433,7 +439,7 @@ static struct gameport *gameport_get_pending_child(struct gameport *parent)
 static int gameport_thread(void *nothing)
 {
 	do {
-		gameport_handle_events();
+		gameport_handle_event();
 		wait_event_interruptible(gameport_wait,
 			kthread_should_stop() || !list_empty(&gameport_event_list));
 		try_to_freeze();
diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c
index edd15db17715..fbb69ef6a77b 100644
--- a/drivers/input/serio/serio.c
+++ b/drivers/input/serio/serio.c
@@ -269,14 +269,20 @@ static struct serio_event *serio_get_event(void)
 	return event;
 }
 
-static void serio_handle_events(void)
+static void serio_handle_event(void)
 {
 	struct serio_event *event;
 	struct serio_driver *serio_drv;
 
 	down(&serio_sem);
 
-	while ((event = serio_get_event())) {
+	/*
+	 * Note that we handle only one event here to give swsusp
+	 * a chance to freeze kseriod thread. Serio events should
+	 * be pretty rare so we are not concerned about taking
+	 * performance hit.
+	 */
+	if ((event = serio_get_event())) {
 
 		switch (event->type) {
 			case SERIO_REGISTER_PORT:
@@ -368,7 +374,7 @@ static struct serio *serio_get_pending_child(struct serio *parent)
 static int serio_thread(void *nothing)
 {
 	do {
-		serio_handle_events();
+		serio_handle_event();
 		wait_event_interruptible(serio_wait,
 			kthread_should_stop() || !list_empty(&serio_event_list));
 		try_to_freeze();