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author | 2019-05-16 12:43:19 +0200 | |
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committer | 2019-05-27 10:51:45 +0200 | |
commit | bb1869012d7b78d1474808cb4c8bd8b272645876 (patch) | |
tree | 1df9a6c5b0a5511970caff3c491de0beac10e579 /kernel | |
parent | ACPI/PCI: PM: Add missing wakeup.flags.valid checks (diff) | |
download | linux-bb1869012d7b78d1474808cb4c8bd8b272645876.tar.gz linux-bb1869012d7b78d1474808cb4c8bd8b272645876.tar.bz2 linux-bb1869012d7b78d1474808cb4c8bd8b272645876.zip |
ACPI: PM: Call pm_set_suspend_via_firmware() during hibernation
On systems with ACPI platform firmware the last stage of hibernation
is analogous to system suspend to S3 (suspend-to-RAM), so it should
be handled analogously. In particular, pm_suspend_via_firmware()
should return 'true' in that stage to let the callers of it know that
control will be passed to the platform firmware going forward, so
pm_set_suspend_via_firmware() needs to be called then in analogy with
acpi_suspend_begin().
However, the platform hibernation ->begin() callback is invoked
during the "freeze" transition (before creating a snapshot image of
system memory) as well as during the "hibernate" transition which is
the last stage of it and pm_set_suspend_via_firmware() should be
invoked by that callback in the latter stage only.
In order to implement that redefine the hibernation ->begin()
callback to take a pm_message_t argument to indicate which stage
of hibernation is taking place and rework acpi_hibernation_begin()
and acpi_hibernation_begin_old() to take it into account as needed.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/power/hibernate.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index c8c272df7154..97522630b1b6 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -129,7 +129,7 @@ static int hibernation_test(int level) { return 0; } static int platform_begin(int platform_mode) { return (platform_mode && hibernation_ops) ? - hibernation_ops->begin() : 0; + hibernation_ops->begin(PMSG_FREEZE) : 0; } /** @@ -542,7 +542,7 @@ int hibernation_platform_enter(void) * hibernation_ops->finish() before saving the image, so we should let * the firmware know that we're going to enter the sleep state after all */ - error = hibernation_ops->begin(); + error = hibernation_ops->begin(PMSG_HIBERNATE); if (error) goto Close; |