ixgbe: set queue0 for srrctl configuration correctly for DCB

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>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 4c38d51397ce..d64a2d7d5fa5 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;