[PATCH v2] hv_sock: Add the support of hibernation
From: Dexuan Cui <decui@microsoft.com>
Date: 2019-09-25 21:34:18
Also in:
linux-hyperv, lkml
Subsystem:
hyper-v/azure core and drivers, networking [general], the rest, vm sockets (af_vsock) · Maintainers:
"K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Stefano Garzarella
Add the necessary dummy callbacks for hibernation.
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Acked-by: David S. Miller <davem@davemloft.net>
---
In v2:
Added David's Acked-by.
Removed [net-next] from the Subject.
@Sasha, can you please pick this up into the hyper-v tree?
net/vmw_vsock/hyperv_transport.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
index f2084e3f7aa4..4c02e38aa728 100644
--- a/net/vmw_vsock/hyperv_transport.c
+++ b/net/vmw_vsock/hyperv_transport.c@@ -930,6 +930,24 @@ static int hvs_remove(struct hv_device *hdev) return 0; } +/* hv_sock connections can not persist across hibernation, and all the hv_sock + * channels are forced to be rescinded before hibernation: see + * vmbus_bus_suspend(). Here the dummy hvs_suspend() and hvs_resume() + * are only needed because hibernation requires that every vmbus device's + * driver should have a .suspend and .resume callback: see vmbus_suspend(). + */ +static int hvs_suspend(struct hv_device *hv_dev) +{ + /* Dummy */ + return 0; +} + +static int hvs_resume(struct hv_device *dev) +{ + /* Dummy */ + return 0; +} + /* This isn't really used. See vmbus_match() and vmbus_probe() */ static const struct hv_vmbus_device_id id_table[] = { {},
@@ -941,6 +959,8 @@ static struct hv_driver hvs_drv = { .id_table = id_table, .probe = hvs_probe, .remove = hvs_remove, + .suspend = hvs_suspend, + .resume = hvs_resume, }; static int __init hvs_init(void)
--
2.19.1