[net-next 02/13] ixgbe: Avoid to write the RETA table when unnecessary

[Jeff Kirsher]

From: Tonghao Zhang <xiangxia.m....@gmail.com>

If indir == 0 in the ixgbe_set_rxfh(), it is unnecessary
to write the HW. Because redirection table is not changed.

Signed-off-by: Tonghao Zhang <xiangxia.m....@gmail.com>
Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
index 221f15803480..89edb9fae6f0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
@@ -3059,6 +3059,8 @@ static int ixgbe_set_rxfh(struct net_device *netdev, 
const u32 *indir,
 
                for (i = 0; i < reta_entries; i++)
                        adapter->rss_indir_tbl[i] = indir[i];
+
+               ixgbe_store_reta(adapter);
        }
 
        /* Fill out the rss hash key */
@@ -3067,8 +3069,6 @@ static int ixgbe_set_rxfh(struct net_device *netdev, 
const u32 *indir,
                ixgbe_store_key(adapter);
        }
 
-       ixgbe_store_reta(adapter);
-
        return 0;
 }
 
-- 
2.14.3