[Intel-gfx] [PATCH v2] drm/i915: Add RPM references in the *_get_hw_state functions

[Marius Vlad]

On Tue, Jan 05, 2016 at 02:54:31PM +0100, Daniel Vetter wrote:
> On Mon, Jan 4, 2016 at 4:05 PM, Ville Syrjälä
> <ville.syrjala at linux.intel.com> wrote:
> > I think what we really need here is some kind of
> > intel_display_power_get_unless_zero() thing. We need to make sure not
> > only that the rpm reference is held when reading out the state, but also
> > that the relevant power well(s) remain enabled while we're reading out
> > the state.
> 
> Yeah, we need to check whether a given piece of hw is enabled or not.
> All the get_hw_state funcs do that, using
> intel_display_power_is_enabled. But it looks like
> intel_ddi_get_hw_state partially gets this wrong. That would also
> address the same backtrace in module unload.

Tried __only__ this patch but it doesn't fix the trace in driver unload, had
the same hunch....

> -Daniel
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> +41 (0) 79 365 57 48 - http://blog.ffwll.ch
> _______________________________________________
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> Intel-gfx at lists.freedesktop.org
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