Drivers: hv: vmbus: Suspend after cleaning up hv_sock and sub channels

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Before suspend, Linux must make sure all the hv_sock channels have been
properly cleaned up, because a hv_sock connection can not persist across
hibernation, and the user-space app must be properly notified of the
state change of the connection.

Before suspend, Linux also must make sure all the sub-channels have been
destroyed, i.e. the related channel structs of the sub-channels must be
properly removed, otherwise they would cause a conflict when the
sub-channels are recreated upon resume.

Add a counter to track such channels, and vmbus_bus_suspend() should wait
for the counter to drop to zero.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Dexuan Cui 2019-09-05 23:01:21 +00:00 • committed by Sasha Levin

parent 1f48dcf180

commit b307b38962

4 changed files with 84 additions and 1 deletions

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26

drivers/hv/channel_mgmt.c

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3

drivers/hv/connection.c

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12

drivers/hv/hyperv_vmbus.h

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44

drivers/hv/vmbus_drv.c

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