Hi Alexander,

On Tue, Sep 22, 2015 at 11:35 PM, Alexander Duyck [off-list ref] wrote:

quoted

This patch corrects an issue in which the polling routine would increase
the budget for Rx to at least 1 per queue if multiple queues were present.
This would result in Rx packets being processed when the budget was 0 which
is meant to indicate that no Rx can be handled.

We may logically have the same issue with VF, right?

 From 4521374ae746543a925982d59a8ba73b6aaee59c Mon Sep 17 00:00:00 2001
From: William Dauchy <redacted>
Date: Fri, 30 Oct 2015 15:48:43 +0100
Subject: [PATCH] ixgbevf: Fix handling of napi budget when multiple queues are
  enabled per vector

This is the same patch as for ixgbe but applied differently according to
busy polling

Signed-off-by: William Dauchy <redacted>
---
  drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 149a0b4..ff6e21d 100644

--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

@@ -1014,6 +1014,8 @@ static int ixgbevf_poll(struct napi_struct

*napi, int budget)
   ixgbevf_for_each_ring(ring, q_vector->tx)
   clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);

+ if (budget <= 0)
+ return budget;
  #ifdef CONFIG_NET_RX_BUSY_POLL
   if (!ixgbevf_qv_lock_napi(q_vector))
   return budget;