[PATCH 08/17] hyper-v: trace vmbus_onversion_response()

[kys]

From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>

Add tracepoint to CHANNELMSG_VERSION_RESPONSE handler.

Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
 drivers/hv/channel_mgmt.c |  3 +++
 drivers/hv/hv_trace.h     | 11 +++++++++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index d1cb85257bf0..c33b7412f303 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -1127,6 +1127,9 @@ static void vmbus_onversion_response(
 	unsigned long flags;
 
 	version_response = (struct vmbus_channel_version_response *)hdr;
+
+	trace_vmbus_onversion_response(version_response);
+
 	spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags);
 
 	list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list,
diff --git a/drivers/hv/hv_trace.h b/drivers/hv/hv_trace.h
index 84c08cdf7235..2a046547107f 100644
--- a/drivers/hv/hv_trace.h
+++ b/drivers/hv/hv_trace.h
@@ -111,6 +111,17 @@ TRACE_EVENT(vmbus_ongpadl_torndown,
 	    TP_printk("gpadl 0x%x", __entry->gpadl)
 	);
 
+TRACE_EVENT(vmbus_onversion_response,
+	    TP_PROTO(const struct vmbus_channel_version_response *response),
+	    TP_ARGS(response),
+	    TP_STRUCT__entry(
+		    __field(u8, ver)
+		    ),
+	    TP_fast_assign(__entry->ver = response->version_supported;
+		    ),
+	    TP_printk("version_supported %d", __entry->ver)
+	);
+
 #undef TRACE_INCLUDE_PATH
 #define TRACE_INCLUDE_PATH .
 #undef TRACE_INCLUDE_FILE
-- 
2.14.1