4.18-stable review patch. If anyone has any objections, please let me know.
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From: Ville Syrjälä ville.syrjala@linux.intel.com
commit 6a8915d0f8cf323e1beb792a33095cf652db4056 upstream.
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.sy... Reviewed-by: Chris Wilson chris@chris-wilson.co.uk (cherry picked from commit f45a7977d1140c11f334e01a9f77177ed68e3bfa) Signed-off-by: Joonas Lahtinen joonas.lahtinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/i915/intel_lpe_audio.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/intel_lpe_audio.c +++ b/drivers/gpu/drm/i915/intel_lpe_audio.c @@ -297,8 +297,10 @@ void intel_lpe_audio_teardown(struct drm 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