https://bugzilla.kernel.org/show_bug.cgi?id=201987

            Bug ID: 201987
           Summary: GPE 0X66 keeps on firing in late suspend phase, thus
                    break suspend-to-idle - HP Zhan 66
           Product: ACPI
           Version: 2.5
    Kernel Version: v4.19
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Power-Sleep-Wake
          Assignee: acpi_power-sleep-w...@kernel-bugs.osdl.org
          Reporter: rui.zh...@intel.com
        Regression: No

Created attachment 279997
  --> https://bugzilla.kernel.org/attachment.cgi?id=279997&action=edit
pm-graph output on HP Zhan 66 laptop, with kernel 4.20-rc4

On a HP KBL-R platform, model name Zhan 66, it is found that the system can not
enter deep c state during suspend-to-idle.

And the rootcause is that GPE 0X66 keeps on firing in the suspend_noirq phase,
causing the system keeps on waking up to handle the ACPI interrupt. Thus,
s2idle_enter() is never invoked in s2idle_loop().

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