[PATCH 0/4] PM: Hibernate: Add hibernation cancellation support

[Muhammad Usama Anjum]

On a normal laptop/PC, the hibernation takes 15-20 seconds which is
considerable time. Once hibernation is triggered from command line or by
some GUI option, the hibernation cannot be cancelled until completed.
Its not a blocker, but poor user experience.

When power button is pressed during hibernation, it generates interrupt
and then the event is routed to userspace. If systemd is being used, the
logind handles these events and performs the specific action.

During hibernation, the first stage is to freeze the userspace. Hence
even if the power button is pressed, it doesn't aborts the hibernation
as user space daemon is frozen.

My device takes ~19 seconds to hibernate. When I was testing hibernation
using rtcwake with timeout of 10 seconds, I found out that hibernation
gets canceled around 10 seconds mark when the interrupt fires.

In this series, the idea is to find a way to cancel the hibernation.
With this series applied, the hibernation gets cancelled gracefully.

The hibernation cancellation support isn't present in very last stage
just before power_down(). I've not been able to handle the error paths
correctly there yet as logs aren't available from that stage. I'll send
that patch separately when it works.

Cc: rafael@xxxxxxxxxx
Cc: superm1@xxxxxxxxxx
---
Changes since RFC:
- Update description of patches
- Use pm_sleep_transition_in_progress() instead of
  hibernation_in_progress()

Muhammad Usama Anjum (4):
  PM: hibernate: export pm_sleep_transition_in_progress()
  ACPI: button: Cancel hibernation if button is pressed during
    hibernation
  Input: Ignore the KEY_POWER events if hibernation is in progress
  PM: sleep: clear pm_abort_suspend at suspend

 drivers/acpi/button.c     | 12 +++++++++---
 drivers/base/power/main.c |  2 ++
 drivers/input/input.c     |  6 ++++++
 kernel/cpu.c              |  1 +
 kernel/power/hibernate.c  |  5 ++++-
 kernel/power/main.c       |  1 +
 kernel/power/process.c    |  1 +
 7 files changed, 24 insertions(+), 4 deletions(-)

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2.47.3