1 files changed, 19 insertions, 8 deletions

diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 79144e950a34..dff8dfac7ed9 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -1948,6 +1948,7 @@ static int ixgbe_set_coalesce(struct net_device *netdev,
                               struct ethtool_coalesce *ec)
 {
         struct ixgbe_adapter *adapter = netdev_priv(netdev);
+        struct ixgbe_q_vector *q_vector;
         int i;
 
         if (ec->tx_max_coalesced_frames_irq)
@@ -1982,14 +1983,24 @@ static int ixgbe_set_coalesce(struct net_device *netdev,
                 adapter->itr_setting = 0;
         }
 
-        for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
-                struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
-                if (q_vector->txr_count && !q_vector->rxr_count)
-                        /* tx vector gets half the rate */
-                        q_vector->eitr = (adapter->eitr_param >> 1);
-                else
-                        /* rx only or mixed */
-                        q_vector->eitr = adapter->eitr_param;
+        /* MSI/MSIx Interrupt Mode */
+        if (adapter->flags &
+            (IXGBE_FLAG_MSIX_ENABLED | IXGBE_FLAG_MSI_ENABLED)) {
+                int num_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
+                for (i = 0; i < num_vectors; i++) {
+                        q_vector = adapter->q_vector[i];
+                        if (q_vector->txr_count && !q_vector->rxr_count)
+                                /* tx vector gets half the rate */
+                                q_vector->eitr = (adapter->eitr_param >> 1);
+                        else
+                                /* rx only or mixed */
+                                q_vector->eitr = adapter->eitr_param;
+                        ixgbe_write_eitr(q_vector);
+                }
+        /* Legacy Interrupt Mode */
+        } else {
+                q_vector = adapter->q_vector[0];
+                q_vector->eitr = adapter->eitr_param;
                 ixgbe_write_eitr(q_vector);
         }