[igt-dev] [PATCH i-g-t v2 00/16] tests/core_hotunplug: Fixes and enhancements

[Janusz Krzysztofik]

On Fri, 2020-08-07 at 11:19 +0200, Janusz Krzysztofik wrote:
> Clean up the test code and unblock unbind variants.

>From the CI report it looks for me like driver (hot)unbind-rebind
operations affect hardware and the driver doesn't handle this
correctly.  Moreover, the test doesn't currently detect this faulty
condition and happily returns success.

On the other hand, the hardware seems not stuck permanently, it looks
like it just requires engines to be reset.

Then, I'm going to extend the series with a more thorough health check
and a more careful recovery.  The unbind-rebind subtest shall report a
failure as soon as it detects that engines require a reset, I believe,
but igt_abort shall not be called unless the recovery phase fails.

Thanks,
Janusz

> 
> @Michał: Since most v2 updates are trivial, I've preserved your
> Reviewd-by: except for patch 11/16 "Follow failed subtests with health
> checks" - please have a look and confirm if you are still OK with it.
> 
> Thanks,
> Janusz
> 
> Janusz Krzysztofik (16):
>   tests/core_hotunplug: Use igt_assert_fd()
>   tests/core_hotunplug: Constify dev_bus_addr string
>   tests/core_hotunplug: Consolidate duplicated debug messages
>   tests/core_hotunplug: Assert successful device filter application
>   tests/core_hotunplug: Fix missing newline
>   tests/core_hotunplug: Maintain a single data structure instance
>   tests/core_hotunplug: Pass errors via a data structure field
>   tests/core_hotunplug: Handle device close errors
>   tests/core_hotunplug: Prepare invariant data once per test run
>   tests/core_hotunplug: Skip selectively on sysfs close errors
>   tests/core_hotunplug: Follow failed subtests with health checks
>   tests/core_hotunplug: Fail subtests on device close errors
>   tests/core_hotunplug: Process return values of sysfs operations
>   tests/core_hotunplug: Assert expected device presence/absence
>   tests/core_hotunplug: Explicitly ignore unused return values
>   tests/core_hotunplug: Un-blocklist *unbind* subtests
> 
>  tests/core_hotunplug.c       | 334 +++++++++++++++++++++--------------
>  tests/intel-ci/blacklist.txt |   2 +-
>  2 files changed, 204 insertions(+), 132 deletions(-)
>