• Takashi Iwai's avatar
    ALSA: hda: Workaround for spurious wakeups on some Intel platforms · a6630529
    Takashi Iwai authored
    We've received a regression report on Intel HD-audio controller that
    wakes up immediately after S3 suspend.  The bisection leads to the
    commit c4c8dd6e ("ALSA: hda: Skip controller resume if not
    needed").  This commit replaces the system-suspend to use
    pm_runtime_force_suspend() instead of the direct call of
    __azx_runtime_suspend().  However, by some really mysterious reason,
    pm_runtime_force_suspend() causes a spurious wakeup (although it calls
    the same __azx_runtime_suspend() internally).
    
    As an ugly workaround for now, revert the behavior to call
    __azx_runtime_suspend() and __azx_runtime_resume() for those old Intel
    platforms that may exhibit such a problem, while keeping the new
    standard pm_runtime_force_suspend() and pm_runtime_force_resume()
    pair for the remaining chips.
    
    Fixes: c4c8dd6e ("ALSA: hda: Skip controller resume if not needed")
    BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208649
    Cc: <stable@vger.kernel.org>
    Link: https://lore.kernel.org/r/20200727164443.4233-1-tiwai@suse.deSigned-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    a6630529
hda_controller.h 6.48 KB