[SRU][B/C/D/OEM-OSP1-B/E][PATCH 0/1] input/mouse: alps trackpoint-only device doesn't work

[Seth Forshee]

On Tue, Jul 16, 2019 at 10:12:56PM +0800, Hui Wang wrote:
> BugLink: https://bugs.launchpad.net/bugs/1836752
> 
> This patch is needed to be merged to oem-osp1-b kernel ASAP, since
> our oem project is waiting for this patch.
> 
> [Impact]
> On one of the latest Lenovo laptops, the trackpoint doesn't work, we
> consulted apls guys, they said this trackpoint is different from others,
> it is a trackpoint-only device, so the current alps.c doesn't support it
> well, while the trackpoint.c can drive it well.
> 
> [Fix]
> Check if it is trakcpoint-only device, if it yes, let trackpoint.c
> handle it.
> 
> [Test Case]
> apply this patch and boot with the kernel, the trackpoint can work
> well.
> 
> [Regression Risk]
> Low. the way of detect trackpoint-only alps device is provided by
> alps. so it is pretty safe.

You assert that it is safe because the method was provided by alps, but
I'd also like to know that regression testing has been done with at
least some other alps hardware. Has any such testing been done?