ixgbe: Replace eitr_low and eitr_high with static values in ixgbe_update_itr

There isn't much point in using variables to store the values of eitr_low
and eitr_high since they are not user changeable.  As such I am replacing
them with the constants 10 and 20 in order to avoid any confusion on what
the values actually are.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index 03175cb..f069c1b 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -511,10 +511,6 @@ struct ixgbe_adapter {
 #endif /* IXGBE_FCOE */
        u32 wol;
 
-       /* Interrupt Throttle Rate */
-       u16 eitr_low;
-       u16 eitr_high;
-
        u16 bd_number;
 
        u16 eeprom_verh;

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index ac35324..71ced43 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1782,20 +1782,19 @@ enum latency_range {
 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
                             struct ixgbe_ring_container *ring_container)
 {
-       u64 bytes_perint;
-       struct ixgbe_adapter *adapter = q_vector->adapter;
        int bytes = ring_container->total_bytes;
        int packets = ring_container->total_packets;
        u32 timepassed_us;
+       u64 bytes_perint;
        u8 itr_setting = ring_container->itr;
 
        if (packets == 0)
                return;
 
        /* simple throttlerate management
-        *    0-20MB/s lowest (100000 ints/s)
-        *   20-100MB/s low   (20000 ints/s)
-        *  100-1249MB/s bulk (8000 ints/s)
+        *   0-10MB/s   lowest (100000 ints/s)
+        *  10-20MB/s   low    (20000 ints/s)
+        *  20-1249MB/s bulk   (8000 ints/s)
         */
        /* what was last interrupt timeslice? */
        timepassed_us = q_vector->itr >> 2;
@@ -1803,17 +1802,17 @@ static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
 
        switch (itr_setting) {
        case lowest_latency:
-               if (bytes_perint > adapter->eitr_low)
+               if (bytes_perint > 10)
                        itr_setting = low_latency;
                break;
        case low_latency:
-               if (bytes_perint > adapter->eitr_high)
+               if (bytes_perint > 20)
                        itr_setting = bulk_latency;
-               else if (bytes_perint <= adapter->eitr_low)
+               else if (bytes_perint <= 10)
                        itr_setting = lowest_latency;
                break;
        case bulk_latency:
-               if (bytes_perint <= adapter->eitr_high)
+               if (bytes_perint <= 20)
                        itr_setting = low_latency;
                break;
        }
@@ -5239,10 +5238,6 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
        adapter->rx_itr_setting = 1;
        adapter->tx_itr_setting = 1;
 
-       /* set defaults for eitr in MegaBytes */
-       adapter->eitr_low = 10;
-       adapter->eitr_high = 20;
-
        /* set default ring sizes */
        adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
        adapter->rx_ring_count = IXGBE_DEFAULT_RXD;