ixgbe: Fix return of invalid txq

a developer had complained of getting lots of warnings:

"eth16 selects TX queue 98, but real number of TX queues is 64"

http://www.mail-archive.com/e1000-devel@lists.sourceforge.net/msg02200.html

As there was no follow up on that bug, I am submitting this
patch assuming that the other return points will not return
invalid txq's, and also that this fixes the bug (not tested).

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 37e2af0a6145baa197c859559c1c02a1ae28ee51..7b7c8486c0bf8dee604ea17949a1d945abeabf9c 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -5329,8 +5329,11 @@ static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
        struct ixgbe_adapter *adapter = netdev_priv(dev);
        int txq = smp_processor_id();
 
-       if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
+       if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
+               while (unlikely(txq >= dev->real_num_tx_queues))
+                       txq -= dev->real_num_tx_queues;
                return txq;
+       }
 
 #ifdef IXGBE_FCOE
        if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&