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Input: trackpoint - assume 3 buttons when buttons detection fails

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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>
This commit is contained in:
Oscar Campos
2017-07-18 17:20:36 -07:00
committed by Dmitry Torokhov
parent dda5202b00
commit 293b915fd9
1 changed files with 2 additions and 2 deletions
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4
drivers/input/mouse/trackpoint.c
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@@ -380,8 +380,8 @@ int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
return 0; return 0;
if (trackpoint_read(ps2dev, TP_EXT_BTN, &button_info)) { if (trackpoint_read(ps2dev, TP_EXT_BTN, &button_info)) {
psmouse_warn(psmouse, "failed to get extended button data\n"); psmouse_warn(psmouse, "failed to get extended button data, assuming 3 buttons\n");
button_info = 0; button_info = 0x33;
} }
psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL); psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);