在 4/14/22 9:47 PM, Andy Shevchenko 写道: > On Thu, Apr 14, 2022 at 2:19 PM Haowen Bai <baihaowen@xxxxxxxxx> wrote: >> function gp2ap020a00f_get_thresh_reg() is unsigned but returning -EINVAL >> errcode, and thresh_reg_l is unsigned but receiving -EINVAL errcode. so >> we have to change u8 -> s8. > s8 is not enough to hold an (arbitrary) error code. To be on the safe > side you need to use int. > Thank you for your suggestion. -- Haowen Bai