linux-kernel - [PATCH 0/3] Disable Suspend-to-Idle in Hyper-V and Fix Hibernation Interruptions

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Message-Id: <1726176470-13133-1-git-send-email-ernis@linux.microsoft.com>
Date: Thu, 12 Sep 2024 14:27:47 -0700
From: Erni Sri Satya Vennela <ernis@...ux.microsoft.com>
To: kys@...rosoft.com,
	haiyangz@...rosoft.com,
	wei.liu@...nel.org,
	decui@...rosoft.com,
	jikos@...nel.org,
	bentiss@...nel.org,
	dmitry.torokhov@...il.com,
	linux-hyperv@...r.kernel.org,
	linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: ernis@...rosoft.com,
	Erni Sri Satya Vennela <ernis@...ux.microsoft.com>
Subject: [PATCH 0/3] Disable Suspend-to-Idle in Hyper-V and Fix Hibernation Interruptions

It has been reported that Hyper-V VM users can unintentionally abort
hibernation by mouse or keyboard movements. To address this issue,
we have decided to remove the wakeup events for the Hyper-V keyboard
and mouse driver. However, this change introduces another problem: 
Suspend-to-Idle brings the system down with no method to wake it back up.

Given that there are no real users of Suspend-to-Idle in Hyper-V,
we have decided to disable this feature for VMBus. This results in:

$echo freeze > /sys/power/state
> bash: echo: write error: Operation not supported

The keyboard and mouse were previously registered as wakeup sources to
interrupt the freeze operation in a VM. Since the freeze operation itself
is no longer supported, we are disabling them as wakeup events.

This patchset ensures that the system remains stable and prevents
unintended interruptions during hibernation.

Erni Sri Satya Vennela (3):
  Drivers: hv: vmbus: Disable Suspend-to-Idle for VMBus
  Revert "Input: hyperv-keyboard - register as a wakeup source"
  Revert "HID: hyperv: register as a wakeup source"

 drivers/hid/hid-hyperv.c              |  6 ------
 drivers/hv/vmbus_drv.c                | 15 ++++++++++++++-
 drivers/input/serio/hyperv-keyboard.c | 12 ------------
 3 files changed, 14 insertions(+), 19 deletions(-)

-- 
2.34.1