Input: psmouse - ESD workaround fix for OLPC XO touchpad

It appears that when the XO touchpad unit resets from ESD, it sends AA
AA instead of AA 00, the psmouse-base code handles the case of AA 00 by
triggering a serio reconnect for the port, causing a full reprobe of
the device.

Testing with OFW shows that this is likely to solve the problem, so
the attached patch simply expands the existing test to also catch AA AA.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Deepak Saxena <dsaxena@laptop.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index f8f86de694bbe6cdeced1097d0ac57a4aebab44c..b407b355dcebb6ff8e67617047d8878d742d1ef5 100644 (file)
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -327,7 +327,9 @@ static irqreturn_t psmouse_interrupt(struct serio *serio,
                        goto out;
                }
 
-               if (psmouse->packet[1] == PSMOUSE_RET_ID) {
+               if (psmouse->packet[1] == PSMOUSE_RET_ID ||
+                   (psmouse->type == PSMOUSE_HGPK &&
+                    psmouse->packet[1] == PSMOUSE_RET_BAT)) {
                        __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
                        serio_reconnect(serio);
                        goto out;