From: Bruce Allan <bruce.w.allan@intel.com>
Date: Sat, 22 Nov 2008 01:00:22 +0000 (-0800)
Subject: e1000e: store EEPROM version number to prevent unnecessary NVM reads
X-Git-Tag: v2.6.29-rc1~581^2~583
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=8452759060ad46fc071a7d5bbf1647df5ea2ceab;p=linux-2.6-omap-h63xx.git

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>
---

diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index c55fd6fdb91..473c41479ec 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 875d769531f..840e8c4fb75 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 f10252b055d..b3f0b479701 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);