Comment 21 for bug 1774950

Thanks @kaihengfeng for the bisection instructions and @jail-j for pointing me in the right direction. (It's probably worth mentioning that sudo make -j`nproc` deb-pkg was needed for the build to work)

Here's the most recent result:

git bisect bad
a192aa923b66a435aae56983c4912ee150bc9b32 is the first bad commit
commit a192aa923b66a435aae56983c4912ee150bc9b32
Author: Rafael J. Wysocki <email address hidden>
Date: Mon Oct 16 03:29:55 2017 +0200

    ACPI / LPSS: Consolidate runtime PM and system sleep handling

    Move the LPSS-specific code from acpi_lpss_runtime_suspend()
    and acpi_lpss_runtime_resume() into separate functions,
    acpi_lpss_suspend() and acpi_lpss_resume(), respectively, and
    make acpi_lpss_suspend_late() and acpi_lpss_resume_early() use
    them too in order to unify the runtime PM and system sleep
    handling in the LPSS driver.

    Signed-off-by: Rafael J. Wysocki <email address hidden>
    Acked-by: Greg Kroah-Hartman <email address hidden>
    Reviewed-by: Ulf Hansson <email address hidden>

:040000 040000 b4ef369c698a10cec8d6224fdc3b8f287eb853b1 20327192ca09ecc0cf0b24b62fdb915ea303b988 M drivers

wasn't sure if I'm meant to keep going so I've run sudo make -j`nproc` deb-pkg again to see what it comes up with.