Input: psmouse - properly reset mouse on shutdown/suspend

Some people report that they need psmouse module unloaded
for suspend to ram/disk to work properly. Let's make port
cleanup behave the same way as driver unload.

This fixes "bad state" roblem on various HP laptops, such
as nx7400.

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

1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index a0e4a033e2db..9a6e4b6bdbf4 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -987,8 +987,36 @@ static void psmouse_resync(struct work_struct *work)
 static void psmouse_cleanup(struct serio *serio)
 {
         struct psmouse *psmouse = serio_get_drvdata(serio);
+        struct psmouse *parent = NULL;
+
+        mutex_lock(&psmouse_mutex);
+
+        if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+                parent = serio_get_drvdata(serio->parent);
+                psmouse_deactivate(parent);
+        }
+
+        psmouse_deactivate(psmouse);
+
+        if (psmouse->cleanup)
+                psmouse->cleanup(psmouse);
 
         psmouse_reset(psmouse);
+
+/*
+ * Some boxes, such as HP nx7400, get terribly confused if mouse
+ * is not fully enabled before suspending/shutting down.
+ */
+        ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
+
+        if (parent) {
+                if (parent->pt_deactivate)
+                        parent->pt_deactivate(parent);
+
+                psmouse_activate(parent);
+        }
+
+        mutex_unlock(&psmouse_mutex);
 }
 
 /*