e1000e: store EEPROM version number to prevent unnecessary NVM reads

Rather than reading the NVM to get the EEPROM version number everytime the
ethool get_drvinfo function is called, read it once during probe and save
it for future reference.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 7 insertions, 5 deletions

diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index c55fd6fdb91c..473c41479ece 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -193,6 +193,7 @@ struct e1000_adapter {
         u16 mng_vlan_id;
         u16 link_speed;
         u16 link_duplex;
+        u16 eeprom_vers;
 
         spinlock_t tx_queue_lock; /* prevent concurrent tail updates */
 
diff --git a/drivers/net/e1000e/ethtool.c b/drivers/net/e1000e/ethtool.c
index 875d769531fd..840e8c4fb753 100644
--- a/drivers/net/e1000e/ethtool.c
+++ b/drivers/net/e1000e/ethtool.c
@@ -588,7 +588,6 @@ static void e1000_get_drvinfo(struct net_device *netdev,
 {
         struct e1000_adapter *adapter = netdev_priv(netdev);
         char firmware_version[32];
-        u16 eeprom_data;
 
         strncpy(drvinfo->driver,  e1000e_driver_name, 32);
         strncpy(drvinfo->version, e1000e_driver_version, 32);
@@ -597,11 +596,10 @@ static void e1000_get_drvinfo(struct net_device *netdev,
          * EEPROM image version # is reported as firmware version # for
          * PCI-E controllers
          */
-        e1000_read_nvm(&adapter->hw, 5, 1, &eeprom_data);
         sprintf(firmware_version, "%d.%d-%d",
-                (eeprom_data & 0xF000) >> 12,
-                (eeprom_data & 0x0FF0) >> 4,
-                eeprom_data & 0x000F);
+                (adapter->eeprom_vers & 0xF000) >> 12,
+                (adapter->eeprom_vers & 0x0FF0) >> 4,
+                (adapter->eeprom_vers & 0x000F));
 
         strncpy(drvinfo->fw_version, firmware_version, 32);
         strncpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index f10252b055d4..b3f0b4797016 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -5025,6 +5025,9 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
         adapter->wol = adapter->eeprom_wol;
         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
 
+        /* save off EEPROM version number */
+        e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
+
         /* reset the hardware with the new settings */
         e1000e_reset(adapter);