[4.12,25/43] Input: trackpoint - assume 3 buttons when buttons detection fails
diff mbox series

Message ID 20170908131827.478710268@linuxfoundation.org
State New, archived
Headers show
  • 4.12.12-stable review
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Commit Message

Greg Kroah-Hartman Sept. 8, 2017, 1:19 p.m. UTC
4.12-stable review patch.  If anyone has any objections, please let me know.


From: Oscar Campos <oscar.campos@member.fsf.org>

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@member.fsf.org>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

 drivers/input/mouse/trackpoint.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff mbox series

--- a/drivers/input/mouse/trackpoint.c
+++ b/drivers/input/mouse/trackpoint.c
@@ -381,8 +381,8 @@  int trackpoint_detect(struct psmouse *ps
 		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);