Chris Wilson writes:
> Keep track of our wakeref used to keep the device awake so we can catch
> any leak.
>
> Signed-off-by: Chris Wilson
> Cc: Jani Nikula
> ---
> drivers/gpu/drm/i915/i915_drv.h | 2 ++
> drivers/gpu/drm/i915/i915_perf.c | 10 +-
> 2 files changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index a20bd2ec48de..bf25ae92f5de 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1320,6 +1320,8 @@ struct i915_perf_stream {
>*/
> struct list_head link;
>
> + intel_wakeref_t wakeref;
> +
> /**
>* @sample_flags: Flags representing the `DRM_I915_PERF_PROP_SAMPLE_*`
>* properties given when opening a stream, representing the contents
> diff --git a/drivers/gpu/drm/i915/i915_perf.c
> b/drivers/gpu/drm/i915/i915_perf.c
> index e4dfd1477c78..b0cbad2e83c5 100644
> --- a/drivers/gpu/drm/i915/i915_perf.c
> +++ b/drivers/gpu/drm/i915/i915_perf.c
> @@ -1364,14 +1364,14 @@ static void i915_oa_stream_destroy(struct
> i915_perf_stream *stream)
>
> free_oa_buffer(dev_priv);
>
> + put_oa_config(dev_priv, stream->oa_config);
> +
Hmm you wanted to put this inside the wakeref. But
I fail to see the reason.
-Mika
> intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
> - intel_runtime_pm_put_unchecked(dev_priv);
> + intel_runtime_pm_put(dev_priv, stream->wakeref);
>
> if (stream->ctx)
> oa_put_render_ctx_id(stream);
>
> - put_oa_config(dev_priv, stream->oa_config);
> -
> if (dev_priv->perf.oa.spurious_report_rs.missed) {
> DRM_NOTE("%d spurious OA report notices suppressed due to
> ratelimiting\n",
>dev_priv->perf.oa.spurious_report_rs.missed);
> @@ -2087,7 +2087,7 @@ static int i915_oa_stream_init(struct i915_perf_stream
> *stream,
>* In our case we are expecting that taking pm + FORCEWAKE
>* references will effectively disable RC6.
>*/
> - intel_runtime_pm_get(dev_priv);
> + stream->wakeref = intel_runtime_pm_get(dev_priv);
> intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
>
> ret = alloc_oa_buffer(dev_priv);
> @@ -2123,7 +2123,7 @@ static int i915_oa_stream_init(struct i915_perf_stream
> *stream,
> put_oa_config(dev_priv, stream->oa_config);
>
> intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
> - intel_runtime_pm_put_unchecked(dev_priv);
> + intel_runtime_pm_put(dev_priv, stream->wakeref);
>
> err_config:
> if (stream->ctx)
> --
> 2.20.1
>
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