linux

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Dexuan Cui 5049385407 Drivers: hv: vmbus: Fix Suspend-to-Idle for Generation-2 VM

commit 1a06d017fb3f388734ffbe5dedee6f8c3af5f2db upstream.

Before the hibernation patchset (e.g. f53335e3289f), in a Generation-2
Linux VM on Hyper-V, the user can run "echo freeze > /sys/power/state" to
freeze the system, i.e. Suspend-to-Idle. The user can press the keyboard
or move the mouse to wake up the VM.

With the hibernation patchset, Linux VM on Hyper-V can hibernate to disk,
but Suspend-to-Idle is broken: when the synthetic keyboard/mouse are
suspended, there is no way to wake up the VM.

Fix the issue by not suspending and resuming the vmbus devices upon
Suspend-to-Idle.

Fixes: f53335e3289f ("Drivers: hv: vmbus: Suspend/resume the vmbus itself for hibernation")
Cc: stable@vger.kernel.org
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Link: https://lore.kernel.org/r/1586663435-36243-1-git-send-email-decui@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2020-05-06 08:15:09 +02:00

channel_mgmt.c

x86/Hyper-V: Unload vmbus channel in hv panic callback

2020-04-23 10:36:23 +02:00

channel.c

Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86_PAE

2019-08-20 12:49:57 -04:00

connection.c

Drivers: hv: vmbus: Resume after fixing up old primary channels

2019-09-06 14:52:44 -04:00

hv_balloon.c

hv_balloon: Balloon up according to request page number