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e1000e: don't check for alternate MAC addr on parts that don't support it

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From: Bruce Allan <bruce.w.allan@intel.com>

The alternate MAC address feature is only supported by 80003ES2LAN and
82571 LOMs as well as a couple 82571 mezzanine cards.  Checking for an
alternate MAC address on other parts can fail leading to the driver not
able to load.  This patch limits the check for an alternate MAC address
to be done only for parts that support the feature.

This issue has been around since support for the feature was introduced
to the e1000e driver in 2.6.34.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Reported-by: Fabio Varesano <fax8@users.sourceforge.net>
Cc: stable@kernel.org
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bruce Allan 2010-08-19 15:48:52 -07:00 committed by David S. Miller
parent 19833b5dff
commit 1aef70ef12
3 changed files with 31 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/net/e1000e/82571.c
View File

@ -936,12 +936,14 @@ static s32 e1000_reset_hw_82571(struct e1000_hw *hw)
ew32(IMC, 0xffffffff);
icr = er32(ICR);
/* Install any alternate MAC address into RAR0 */
ret_val = e1000_check_alt_mac_addr_generic(hw);
if (ret_val)
return ret_val;
if (hw->mac.type == e1000_82571) {
/* Install any alternate MAC address into RAR0 */
ret_val = e1000_check_alt_mac_addr_generic(hw);
if (ret_val)
return ret_val;
e1000e_set_laa_state_82571(hw, true);
e1000e_set_laa_state_82571(hw, true);
}
/* Reinitialize the 82571 serdes link state machine */
if (hw->phy.media_type == e1000_media_type_internal_serdes)
@ -1618,14 +1620,16 @@ static s32 e1000_read_mac_addr_82571(struct e1000_hw *hw)
{
s32 ret_val = 0;
/*
* If there's an alternate MAC address place it in RAR0
* so that it will override the Si installed default perm
* address.
*/
ret_val = e1000_check_alt_mac_addr_generic(hw);
if (ret_val)
goto out;
if (hw->mac.type == e1000_82571) {
/*
* If there's an alternate MAC address place it in RAR0
* so that it will override the Si installed default perm
* address.
*/
ret_val = e1000_check_alt_mac_addr_generic(hw);
if (ret_val)
goto out;
}
ret_val = e1000_read_mac_addr_generic(hw);

4
drivers/net/e1000e/defines.h
View File

@ -621,6 +621,7 @@
#define E1000_FLASH_UPDATES 2000
/* NVM Word Offsets */
#define NVM_COMPAT 0x0003
#define NVM_ID_LED_SETTINGS 0x0004
#define NVM_INIT_CONTROL2_REG 0x000F
#define NVM_INIT_CONTROL3_PORT_B 0x0014
@ -643,6 +644,9 @@
/* Mask bits for fields in Word 0x1a of the NVM */
#define NVM_WORD1A_ASPM_MASK 0x000C
/* Mask bits for fields in Word 0x03 of the EEPROM */
#define NVM_COMPAT_LOM 0x0800
/* For checksumming, the sum of all words in the NVM should equal 0xBABA. */
#define NVM_SUM 0xBABA

10
drivers/net/e1000e/lib.c
View File

@ -183,6 +183,16 @@ s32 e1000_check_alt_mac_addr_generic(struct e1000_hw *hw)
u16 offset, nvm_alt_mac_addr_offset, nvm_data;
u8 alt_mac_addr[ETH_ALEN];
ret_val = e1000_read_nvm(hw, NVM_COMPAT, 1, &nvm_data);
if (ret_val)
goto out;
/* Check for LOM (vs. NIC) or one of two valid mezzanine cards */
if (!((nvm_data & NVM_COMPAT_LOM) ||
(hw->adapter->pdev->device == E1000_DEV_ID_82571EB_SERDES_DUAL) ||
(hw->adapter->pdev->device == E1000_DEV_ID_82571EB_SERDES_QUAD)))
goto out;
ret_val = e1000_read_nvm(hw, NVM_ALT_MAC_ADDR_PTR, 1,
&nvm_alt_mac_addr_offset);
if (ret_val) {