Patch "Input: trackpoint - assume 3 buttons when buttons detection fails" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

Input: trackpoint - assume 3 buttons when buttons detection fails

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
input-trackpoint-assume-3-buttons-when-buttons-detection-fails.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Oscar Campos <[email protected]>
Date: Tue, 18 Jul 2017 17:20:36 -0700
Subject: Input: trackpoint - assume 3 buttons when buttons detection fails

From: Oscar Campos <[email protected]>

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.

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

@@ -381,8 +381,8 @@ int trackpoint_detect(struct psmouse *ps
 		return 0;
 
 	if (trackpoint_read(&psmouse->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);

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/input-trackpoint-assume-3-buttons-when-buttons-detection-fails.patch