On Tue, Feb 13, 2018 at 09:57:47AM +0000, Tvrtko Ursulin wrote:
> From: Chris Wilson <[email protected]>
>
> As we peek inside struct device to query members guarded by CONFIG_PM,
> so must be the code.
>
> Reported-by: kbuild test robot <[email protected]>
> Fixes: 1fe699e30113 ("drm/i915/pmu: Fix sleep under atomic in RC6 readout")
> Signed-off-by: Chris Wilson <[email protected]>
> Cc: Tvrtko Ursulin <[email protected]>
> Reviewed-by: Tvrtko Ursulin <[email protected]>
> Link:
> https://patchwork.freedesktop.org/patch/msgid/[email protected]
> (cherry picked from commit 05273c950a3c93c5f96be8807eaf24f2cc9f1c1e)
All 4 patches applied to fixes.
Thanks for backporting and for adding cherry-picked message.
> ---
> drivers/gpu/drm/i915/i915_pmu.c | 33 +++++++++++++++++++++++----------
> 1 file changed, 23 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
> index e13859aaa2a3..0e9b98c32b62 100644
> --- a/drivers/gpu/drm/i915/i915_pmu.c
> +++ b/drivers/gpu/drm/i915/i915_pmu.c
> @@ -409,22 +409,32 @@ static int i915_pmu_event_init(struct perf_event *event)
> return 0;
> }
>
> -static u64 get_rc6(struct drm_i915_private *i915, bool locked)
> +static u64 __get_rc6(struct drm_i915_private *i915)
> {
> - unsigned long flags;
> u64 val;
>
> - if (intel_runtime_pm_get_if_in_use(i915)) {
> - val = intel_rc6_residency_ns(i915, IS_VALLEYVIEW(i915) ?
> - VLV_GT_RENDER_RC6 :
> - GEN6_GT_GFX_RC6);
> + val = intel_rc6_residency_ns(i915,
> + IS_VALLEYVIEW(i915) ?
> + VLV_GT_RENDER_RC6 :
> + GEN6_GT_GFX_RC6);
>
> - if (HAS_RC6p(i915))
> - val += intel_rc6_residency_ns(i915, GEN6_GT_GFX_RC6p);
> + if (HAS_RC6p(i915))
> + val += intel_rc6_residency_ns(i915, GEN6_GT_GFX_RC6p);
> +
> + if (HAS_RC6pp(i915))
> + val += intel_rc6_residency_ns(i915, GEN6_GT_GFX_RC6pp);
> +
> + return val;
> +}
>
> - if (HAS_RC6pp(i915))
> - val += intel_rc6_residency_ns(i915, GEN6_GT_GFX_RC6pp);
> +static u64 get_rc6(struct drm_i915_private *i915, bool locked)
> +{
> +#if IS_ENABLED(CONFIG_PM)
> + unsigned long flags;
> + u64 val;
>
> + if (intel_runtime_pm_get_if_in_use(i915)) {
> + val = __get_rc6(i915);
> intel_runtime_pm_put(i915);
>
> /*
> @@ -481,6 +491,9 @@ static u64 get_rc6(struct drm_i915_private *i915, bool
> locked)
> }
>
> return val;
> +#else
> + return __get_rc6(i915);
> +#endif
> }
>
> static u64 __i915_pmu_event_read(struct perf_event *event, bool locked)
> --
> 2.14.1
>
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