Re: [PATCH v3] gpio: cdev: sanitize the label before requesting the interrupt

[Naresh Kamboju]

Results from Linaro’s test farm.
Regressions on arm64, arm, x86_64, and i386 with libgpiod tests.

libgpiod test regressions noticed on Linux stable-rc 6.8, 6.7 and 6.6
and Linux next and mainline master v6.9-rc2.

Anders bisected and found this first bad commit,
  gpio: cdev: sanitize the label before requesting the interrupt
  commit b34490879baa847d16fc529c8ea6e6d34f004b38 upstream.

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

LKFT is running libgpiod test suite version
  v2.0.1-0-gae275c3 (and also tested v2.1)

libgpiod
  - _gpiod_edge-event_edge_event_wait_timeout
  - _gpiod_edge-event_event_copy
  - _gpiod_edge-event_null_buffer
  - _gpiod_edge-event_read_both_events
  - _gpiod_edge-event_read_both_events_blocking
  - _gpiod_edge-event_read_falling_edge_event
  - _gpiod_edge-event_read_rising_edge_event
  - _gpiod_edge-event_read_rising_edge_event_polled
  - _gpiod_edge-event_reading_more_events_than_the_queue_contains_doesnt_block
  - _gpiod_edge-event_seqno
  - _gpiod_line-info_edge_detection_settings

Test log:
-------
ok 16 /gpiod/edge-event/edge_event_buffer_max_capacity
**
gpiod-test:ERROR:tests-edge-event.c:52:_gpiod_test_func_edge_event_wait_timeout: '_request' should not be NULL
# gpiod-test:ERROR:tests-edge-event.c:52:_gpiod_test_func_edge_event_wait_timeout: '_request' should not be NULL
not ok 17 /gpiod/edge-event/edge_event_wait_timeout
ok 18 /gpiod/edge-event/cannot_request_lines_in_output_mode_with_edge_detection
**
gpiod-test:ERROR:tests-edge-event.c:125:_gpiod_test_func_read_both_events: '_request' should not be NULL
# gpiod-test:ERROR:tests-edge-event.c:125:_gpiod_test_func_read_both_events: '_request' should not be NULL
not ok 19 /gpiod/edge-event/read_both_events

Steps to reproduce:
-----
https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2eUlyN8HN4R1u0RyLwN6hx7IV0I/reproducer

Links:
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240402/testrun/23265184/suite/libgpiod/tests/
 - https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.9-rc2/testrun/23244617/suite/libgpiod/tests/
 - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2eUlyN8HN4R1u0RyLwN6hx7IV0I
 - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.8.y/build/v6.8.2-400-gbffeaccf18b5/testrun/23252337/suite/libgpiod/tests/
 - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.7.y/build/v6.7.11-433-gb15156435f06/testrun/23252698/suite/libgpiod/tests/
 - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.6.y/build/v6.6.23-397-g75a2533b74d0/testrun/23254910/suite/libgpiod/tests/

--
Linaro LKFT
https://lkft.linaro.org