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authorShradha Gupta <shradhagupta@linux.microsoft.com>2022-07-10 21:11:47 -0700
committerWei Liu <wei.liu@kernel.org>2022-07-11 18:53:42 +0000
commit52be93558a9b32f5294750c1394d81e31fe11d6d (patch)
tree867b177769257c5f8d4dc3be4685e90694d22918 /drivers/hv/connection.c
parent32346491ddf24599decca06190ebca03ff9de7f8 (diff)
downloadlinux-52be93558a9b32f5294750c1394d81e31fe11d6d.tar.bz2
Drivers: hv: vm_bus: Handle vmbus rescind calls after vmbus is suspended
Add a flag to indicate that the vmbus is suspended so we should ignore any offer message. Add a new work_queue for rescind msg, so we could drain it along with other offer work_queues upon suspension. It was observed that in some hibernation related scenario testing, after vmbus_bus_suspend() we get rescind offer message for the vmbus. This would lead to processing of a rescind message for a channel that has already been suspended. Signed-off-by: Shradha Gupta <shradhagupta@linux.microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20220711041147.GA5569@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv/connection.c')
-rw-r--r--drivers/hv/connection.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
index 6218bbf6863a..eca7afd366d6 100644
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -171,6 +171,14 @@ int vmbus_connect(void)
goto cleanup;
}
+ vmbus_connection.rescind_work_queue =
+ create_workqueue("hv_vmbus_rescind");
+ if (!vmbus_connection.rescind_work_queue) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+ vmbus_connection.ignore_any_offer_msg = false;
+
vmbus_connection.handle_primary_chan_wq =
create_workqueue("hv_pri_chan");
if (!vmbus_connection.handle_primary_chan_wq) {
@@ -357,6 +365,9 @@ void vmbus_disconnect(void)
if (vmbus_connection.handle_primary_chan_wq)
destroy_workqueue(vmbus_connection.handle_primary_chan_wq);
+ if (vmbus_connection.rescind_work_queue)
+ destroy_workqueue(vmbus_connection.rescind_work_queue);
+
if (vmbus_connection.work_queue)
destroy_workqueue(vmbus_connection.work_queue);