Hi gpio and LKML developers,

Greeting!

Platform: TGL-U platform
Kernel: 6.0-rc6 mainline

When executed gpio kselftest:
tools/testing/selftests/gpio/gpio-mockup.sh

# ./gpio/gpio-mockup.sh
test failed: can't remove existing gpio-mockup module
GPIO gpio-mockup test FAIL
# lsmod  | grep gpio
gpio_mockup            16384  -1

At the step "modprobe -r -q gpio_mockup", there was BUG info in dmesg:

[   43.928611] gpiochip_find_base: found new base at 632
...
[   44.021733] gpio gpiochip1: registered chardev handle for 1 lines
[   44.036775] BUG: kernel NULL pointer dereference, address: 00000000000000a0
[   44.036816] #PF: supervisor write access in kernel mode
[   44.036833] #PF: error_code(0x0002) - not-present page
...
[   44.037213] Call Trace:
[   44.037223]  <TASK>
[   44.037235]  simple_recursive_removal+0x9d/0x2a0
[   44.037255]  ? debugfs_lookup_and_remove+0x40/0x40
[   44.037276]  ? preempt_count_add+0x7c/0xc0

Dmesg is in attached.

Thanks!