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| author | Lukas Wunner <lukas@wunner.de> | 2016-03-23 00:11:20 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-03-23 02:43:11 +0100 |
| commit | fbda4b38fa3995aa0777fe9cbbdcb223c6292083 (patch) | |
| tree | d4d9f9750a861185e8a249e480332894ffc69000 /drivers | |
| parent | PM / sleep: Clear pm_suspend_global_flags upon hibernate (diff) | |
| download | linux-fbda4b38fa3995aa0777fe9cbbdcb223c6292083.tar.xz linux-fbda4b38fa3995aa0777fe9cbbdcb223c6292083.zip | |
ACPI / PM: Runtime resume devices when waking from hibernate
Commit 58a1fbbb2ee8 ("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: 58a1fbbb2ee8 (PM / PCI / ACPI: Kick devices that might have been reset by firmware)
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: 4.4+ <stable@vger.kernel.org> # 4.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/sleep.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 9cb975200cac..f054cadf30d8 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -714,6 +714,7 @@ static int acpi_hibernation_enter(void) static void acpi_hibernation_leave(void) { + pm_set_resume_via_firmware(); /* * If ACPI is not enabled by the BIOS and the boot kernel, we need to * enable it here. |