[net-next-2.6 PATCH 2/5] ixgbe: set queue0 for srrctl configuration correctly for DCB

[Jeff Kirsher <jeffrey.t.kirsher@intel.com>]

From: Alexander Duyck <alexander.h.duyck@intel.com>

The current configuration is not setting queue 0 correctly for DCB
configurations.  As a result unconfigured queues are being used to setup
the SRRCTL register rx buffer len sizes.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/ixgbe/ixgbe_main.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 4c38d51..d64a2d7 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -1740,7 +1740,18 @@ static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter, int index)
 	unsigned long mask;
 
 	if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
-		queue0 = index;
+		if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
+			int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
+			if (dcb_i == 8)
+				queue0 = index >> 4;
+			else if (dcb_i == 4)
+				queue0 = index >> 5;
+			else
+				dev_err(&adapter->pdev->dev, "Invalid DCB "
+				        "configuration\n");
+		} else {
+			queue0 = index;
+		}
 	} else {
 		mask = (unsigned long) adapter->ring_feature[RING_F_RSS].mask;
 		queue0 = index & mask;