[win-pv-devel] [PATCH] Avoid calculating a hash if it is not necessary

[Paul Durrant <paul.durrant@xxxxxxxxxx>]

If there is only a single queue then we do not need to calculate a hash.
There is only one choice in how to steer the packet!

Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
---
 src/xenvif/transmitter.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/xenvif/transmitter.c b/src/xenvif/transmitter.c
index 175ea03..90b4008 100644
--- a/src/xenvif/transmitter.c
+++ b/src/xenvif/transmitter.c
@@ -5081,6 +5081,9 @@ __TransmitterHashPacket(
 
     Value = 0;
 
+    if (FrontendGetNumQueues(Frontend) == 1)
+        goto done;
+
     if (IpHeader->Version == 4) {
         PIPV4_HEADER    Version4 = &IpHeader->Version4;
 
-- 
2.5.3


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