[Bug 110943] [CI][BAT][guc] igt@*(suspend|s3)* - dmesg-warn - Unexpected event: no suitable handler

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110943

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #17 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit 9be02fde93e5b564663f10a48f19159fba718e3d (HEAD -> drm-intel-next-queued,
drm-intel/for-linux-next, drm-intel/drm-intel-next-queued)
Author: Fernando Pacheco <fernando.pacheco at intel.com>
Date:   Thu Aug 29 10:41:53 2019 -0700

    drm/i915/uc: Extract common code from GuC stop/disable comm

    During normal driver unload we attempt to disable GuC communication
    while it is currently stopped. This results in a nop'd call to
    intel_guc_ct_disable within guc_disable_communication because
    stop/disable rely on the same flag to prevent further comms with CT.

    We can avoid the call to disable and still leave communication in a
    satisfactory state by extracting a set of shared steps from stop/disable.
    This set can include guc_disable_interrupts as we do not require the
    single caller of guc_stop_communication to be atomic:
    "drm/i915/selftests: Fixup atomic reset checking".

    This situation (stop -> disable) only occurs during intel_uc_fini_hw,
    so during fini, call guc_disable_communication only if currently enabled.
    The symmetric calls to enable/disable remain unmodified for all other
    scenarios.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110943
    Signed-off-by: Fernando Pacheco <fernando.pacheco at intel.com>
    Cc: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
    Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
    Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20190829174154.14675-1-fernando.pacheco@intel.com

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