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>

3 files changed, 30 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);
 }
 
 /*
diff --git a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h
index 1b74cae8a556..cf1de95b6f27 100644
--- a/drivers/input/mouse/psmouse.h
+++ b/drivers/input/mouse/psmouse.h
@@ -68,6 +68,7 @@ struct psmouse {
 
         int (*reconnect)(struct psmouse *psmouse);
         void (*disconnect)(struct psmouse *psmouse);
+        void (*cleanup)(struct psmouse *psmouse);
         int (*poll)(struct psmouse *psmouse);
 
         void (*pt_activate)(struct psmouse *psmouse);
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 49ac696d6cff..f0f9413d762c 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -652,6 +652,7 @@ int synaptics_init(struct psmouse *psmouse)
         psmouse->set_rate = synaptics_set_rate;
         psmouse->disconnect = synaptics_disconnect;
         psmouse->reconnect = synaptics_reconnect;
+        psmouse->cleanup = synaptics_reset;
         psmouse->pktsize = 6;
         /* Synaptics can usually stay in sync without extra help */
         psmouse->resync_time = 0;