[Bug 103731] [DRM/i915][Bisected] Kernel panic in setup_vector_irq() with HDMI LPE driver while putting offline CPU thread back to online

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103731

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
For reference, the bisect result is

commit eef57324d926f0d8c7a40069e7d26e0cb0651b47
Author: Jerome Anand <jerome.anand at intel.com>
Date:   Wed Jan 25 04:27:49 2017 +0530

    drm/i915: setup bridge for HDMI LPE audio driver

    Enable support for HDMI LPE audio mode on Baytrail and
    Cherrytrail when HDaudio controller is not detected

    Setup minimum required resources during i915_driver_load:
    1. Create a platform device to share MMIO/IRQ resources
    2. Make the platform device child of i915 device for runtime PM.
    3. Create IRQ chip to forward HDMI LPE audio irqs.

    HDMI LPE audio driver (a standalone sound driver) probes the
    LPE audio device and creates a new sound card.

    Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
    Signed-off-by: Jerome Anand <jerome.anand at intel.com>
    Acked-by: Jani Nikula <jani.nikula at intel.com>
    Signed-off-by: Takashi Iwai <tiwai at suse.de>

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