• Lukas Wunner's avatar
    ACPI / PM: Runtime resume devices when waking from hibernate · fbda4b38
    Lukas Wunner authored
    Commit 58a1fbbb ("PM / PCI / ACPI: Kick devices that might have been
    reset by firmware") added a runtime resume for devices that were runtime
    suspended when the system entered suspend-to-RAM.
    
    Briefly, the motivation was to ensure that devices did not remain in a
    reset-power-on state after resume, potentially preventing deep SoC-wide
    low-power states from being entered on idle.
    
    Currently we're not doing the same when leaving suspend-to-disk and this
    asymmetry is a problem if drivers rely on the automatic resume triggered
    by pm_complete_with_resume_check(). Fix it.
    
    Fixes: 58a1fbbb (PM / PCI / ACPI: Kick devices that might have been reset by firmware)
    Signed-off-by: default avatarLukas Wunner <lukas@wunner.de>
    Cc: 4.4+ <stable@vger.kernel.org> # 4.4+
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    fbda4b38
sleep.c 21 KB