From: Oscar Campos <oscar.campos@xxxxxxxxxxxxxx>
commit 293b915fd9bebf33cdc906516fb28d54649a25ac upstream.
Trackpoint buttons detection fails on ThinkPad 570 and 470 series,
this makes the middle button of the trackpoint to not being recogized.
As I don't believe there is any trackpoint with less than 3 buttons this
patch just assumes three buttons when the extended button information
read fails.
Signed-off-by: Oscar Campos <oscar.campos@xxxxxxxxxxxxxx>
Acked-by: Peter Hutterer <peter.hutterer@xxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 4.11+
Signed-off-by: Aaron Ma <aaron.ma@xxxxxxxxxxxxx>
---
drivers/input/mouse/trackpoint.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
index fb3810d35c44..0871010f18d5 100644
--- a/drivers/input/mouse/trackpoint.c
+++ b/drivers/input/mouse/trackpoint.c
@@ -381,8 +381,8 @@ int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
return 0;
if (trackpoint_read(ps2dev, TP_EXT_BTN, &button_info)) {
- psmouse_warn(psmouse, "failed to get extended button data\n");
- button_info = 0;
+ psmouse_warn(psmouse, "failed to get extended button data, assuming 3 buttons\n");
+ button_info = 0x33;
}
psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);
--
2.13.5