Messages in this thread Patch in this message | | | From | Vitaly Kuznetsov <> | Subject | [PATCH] Drivers: hv: vmbus: don't send CHANNELMSG_UNLOAD on pre-Win2012R2 hosts | Date | Wed, 1 Jul 2015 12:30:17 +0200 |
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Pre-Win2012R2 hosts don't properly handle CHANNELMSG_UNLOAD and wait_for_completion() hangs. Avoid sending such request on old hosts.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- drivers/hv/channel_mgmt.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 4506a66..00ba3f3 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -469,6 +469,10 @@ void vmbus_initiate_unload(void) { struct vmbus_channel_message_header hdr; + /* Pre-Win2012R2 hosts don't support reconnect */ + if (vmbus_proto_version < VERSION_WIN8_1) + return; + init_completion(&vmbus_connection.unload_event); memset(&hdr, 0, sizeof(struct vmbus_channel_message_header)); hdr.msgtype = CHANNELMSG_UNLOAD; -- 2.4.3
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