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| author | Dexuan Cui <decui@microsoft.com> | 2019-09-05 23:01:21 +0000 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2019-09-06 14:52:44 -0400 |
| commit | b307b38962eb0f22d1aa6dcf53cb7d3c2ed5eec7 (patch) | |
| tree | 38f55d99f6960a7738cb8af94ce4837de60b2444 /drivers/hv/connection.c | |
| parent | 1f48dcf180e5422b1a633b24680dd0f5c3f540f5 (diff) | |
| download | lwn-b307b38962eb0f22d1aa6dcf53cb7d3c2ed5eec7.tar.gz lwn-b307b38962eb0f22d1aa6dcf53cb7d3c2ed5eec7.zip | |
Drivers: hv: vmbus: Suspend after cleaning up hv_sock and sub channels
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>
Diffstat (limited to 'drivers/hv/connection.c')
| -rw-r--r-- | drivers/hv/connection.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 806319cd5ccf..99851ea682eb 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -26,6 +26,9 @@ struct vmbus_connection vmbus_connection = { .conn_state = DISCONNECTED, .next_gpadl_handle = ATOMIC_INIT(0xE1E10), + + .ready_for_suspend_event= COMPLETION_INITIALIZER( + vmbus_connection.ready_for_suspend_event), }; EXPORT_SYMBOL_GPL(vmbus_connection); |