ACK: [SRU][PATCH 0/1][X/Z/A] Fix middle button issue of trackpoint

[Hui Wang]

On 09/06/2017 12:29 PM, Aaron Ma wrote:
> BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1715271
>
> [Impact]
> Middle button doesn't work on several Thinkpad laptops like E570, E475, E470, E575 and X1Carbon.
>
> When middle button fails to work, logs show:
> psmouse serio2: trackpoint: failed to get extended button data
>
> It fails to read out ext button info via PS2 command.
> Almost all the Thinkpad have 3 buttons, so set it to 3 button when it fails to read button info.
>
> [Fix]
> Fix it by setting default button info to 3 when failed to detect it.
>
> [Test Case]
> Middle button of trackpoint works fine.
>
> [Regression Potential]
> Very low.
> This patch set the button value to 0x33 after failure of detection.
>
> Oscar Campos (1):
>    Input: trackpoint - assume 3 buttons when buttons detection fails
>
>   drivers/input/mouse/trackpoint.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
A clean and safe cherrypick/backport.

Acked-by: Hui Wang<hui.wang at canonical.com>

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