hyper-v: trace vmbus_request_offers()

Add tracepoint to CHANNELMSG_REQUESTOFFERS sender.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/hv/channel_mgmt.c

@@ -1224,9 +1224,11 @@ int vmbus_request_offers(void)
 
 	msg->msgtype = CHANNELMSG_REQUESTOFFERS;
 
-
 	ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_message_header),
 			     true);
+
+	trace_vmbus_request_offers(ret);
+
 	if (ret != 0) {
 		pr_err("Unable to request offers - %d\n", ret);