Input: trackpoint - force 3 buttons if 0 button is reported

[mirror_ubuntu-artful-kernel.git] / drivers / input / mouse / trackpoint.c

diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
index 0871010f18d5f449e6440a5e41f71d24b8aecfd2..92a8898682a6d8460a4e23c081e3395cb59e08c8 100644 (file)
--- a/drivers/input/mouse/trackpoint.c
+++ b/drivers/input/mouse/trackpoint.c
@@ -383,6 +383,9 @@ int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
        if (trackpoint_read(ps2dev, TP_EXT_BTN, &button_info)) {
                psmouse_warn(psmouse, "failed to get extended button data, assuming 3 buttons\n");
                button_info = 0x33;
+       } else if (!button_info) {
+               psmouse_warn(psmouse, "got 0 in extended button data, assuming 3 buttons\n");
+               button_info = 0x33;
        }
 
        psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);