[igt-dev] [PATCH i-g-t] tests/perf_pmu: Restore runtime PM at subtest exit

[Chris Wilson]

Quoting Tvrtko Ursulin (2018-07-19 17:37:56)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> Restore runtime PM state (via a newly added library function) when the
> test which sets it up exit. This was we avoid running all subsequent sub-
> tests in the aggressive runtime PM mode.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> ---
>  lib/igt_pm.c     | 13 ++++++++++++-
>  lib/igt_pm.h     |  1 +
>  tests/perf_pmu.c |  3 +++
>  3 files changed, 16 insertions(+), 1 deletion(-)
> 
> diff --git a/lib/igt_pm.c b/lib/igt_pm.c
> index 8ac132269d79..2e2eea5d3b2d 100644
> --- a/lib/igt_pm.c
> +++ b/lib/igt_pm.c
> @@ -297,7 +297,13 @@ int pm_status_fd = -1;
>  static char __igt_pm_runtime_autosuspend[64];
>  static char __igt_pm_runtime_control[64];
>  
> -static void __igt_pm_runtime_exit_handler(int sig)
> +/**
> + * igt_restore_runtime_pm:
> + *
> + * Restores the runtime PM configuration as it was before the call to
> + * igt_setup_runtime_pm.
> + */
> +void igt_restore_runtime_pm(void)
>  {
>         int fd;

Should we eat __igt_pm_runtime_autosuspend so we only apply it once for
each igt_setup_runtime_pm?
-Chris