On Tue, Dec 10, 2024 at 07:31:26PM +0800, Hui Wang wrote:
> Recently we found the fifo_read() and fifo_write() are broken in our
> 5.15 and 5.4 kernels after cherry-pick the commit e635f652696e
> ("serial: sc16is7xx: convert from _raw_ to _noinc_ regmap functions
> for FIFO"), that is because the reg needs to shift if we don't
> cherry-pick a prerequisite commit 3837a0379533 ("serial: sc16is7xx:
> improve regmap debugfs by using one regmap per port").
>
> It is hard to backport the prerequisite commit to 5.15.y and 5.10.y
> due to the significant conflict. To be safe, here fix it by shifting
> the reg as regmap_volatile() does.
Please try, submit the series of upstream commits first and then if it's
too rough, we can evaluate it later. As-is, I can't take this, sorry.
greg k-h
