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drm/i915: Don't oops during modeset shutdown after lpe audio deinit 

We deinit the lpe audio device before we call
drm_atomic_helper_shutdown(), which means the platform device
may already be gone when it comes time to shut down the crtc.
As we don't know when the last reference to the platform
device gets dropped by the audio driver we can't assume that
the device and its data are still around when turning off the
crtc. Mark the platform device as gone as soon as we do the
audio deinit.

Cc: stable@vger.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181105194604.6994-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit f45a7977d1)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
hifive-unleashed-5.1
Ville Syrjälä 2018-11-05 21:46:04 +02:00 committed by Joonas Lahtinen
parent 0014868b9c
commit 6a8915d0f8
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/i915/intel_lpe_audio.c
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@ -297,8 +297,10 @@ void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv)
lpe_audio_platdev_destroy(dev_priv);
irq_free_desc(dev_priv->lpe_audio.irq);
}
dev_priv->lpe_audio.irq = -1;
dev_priv->lpe_audio.platdev = NULL;
}
/**
* intel_lpe_audio_notify() - notify lpe audio event