From e938dc4c79f830ebfae06961e0ec3c05de4fd9d7 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Mon, 5 Oct 2009 06:34:25 +0000 Subject: [PATCH] igb: change how we handle alternate mac addresses commit 22896639af98ebc721a94ed71fc3acf2fb4a24dc upstream. This patch allows us to treat the alternate mac address as though it is the physical address on the adapter. This is accomplished by letting the alt_mac_address function to only fail on an NVM error. If no errors occur and the alternate mac address is not present then RAR0 is read as the default mac address. Signed-off-by: Alexander Duyck Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller Cc: Brandon Philips Signed-off-by: Greg Kroah-Hartman --- drivers/net/igb/e1000_82575.c | 13 +++++++++++-- drivers/net/igb/e1000_hw.h | 2 ++ drivers/net/igb/e1000_mac.c | 17 +++++++++-------- 3 files changed, 22 insertions(+), 10 deletions(-) diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c index c6d97ebdfb80..33352ffa9669 100644 --- a/drivers/net/igb/e1000_82575.c +++ b/drivers/net/igb/e1000_82575.c @@ -1168,9 +1168,18 @@ static s32 igb_read_mac_addr_82575(struct e1000_hw *hw) { s32 ret_val = 0; - if (igb_check_alt_mac_addr(hw)) - ret_val = igb_read_mac_addr(hw); + /* + * If there's an alternate MAC address place it in RAR0 + * so that it will override the Si installed default perm + * address. + */ + ret_val = igb_check_alt_mac_addr(hw); + if (ret_val) + goto out; + + ret_val = igb_read_mac_addr(hw); +out: return ret_val; } diff --git a/drivers/net/igb/e1000_hw.h b/drivers/net/igb/e1000_hw.h index 1a23aeb2d404..72081df3a397 100644 --- a/drivers/net/igb/e1000_hw.h +++ b/drivers/net/igb/e1000_hw.h @@ -53,6 +53,8 @@ struct e1000_hw; #define E1000_FUNC_1 1 +#define E1000_ALT_MAC_ADDRESS_OFFSET_LAN1 3 + enum e1000_mac_type { e1000_undefined = 0, e1000_82575, diff --git a/drivers/net/igb/e1000_mac.c b/drivers/net/igb/e1000_mac.c index 7d76bb085e10..d4fa82c45fb9 100644 --- a/drivers/net/igb/e1000_mac.c +++ b/drivers/net/igb/e1000_mac.c @@ -185,13 +185,12 @@ s32 igb_check_alt_mac_addr(struct e1000_hw *hw) } if (nvm_alt_mac_addr_offset == 0xFFFF) { - ret_val = -(E1000_NOT_IMPLEMENTED); + /* There is no Alternate MAC Address */ goto out; } if (hw->bus.func == E1000_FUNC_1) - nvm_alt_mac_addr_offset += ETH_ALEN/sizeof(u16); - + nvm_alt_mac_addr_offset += E1000_ALT_MAC_ADDRESS_OFFSET_LAN1; for (i = 0; i < ETH_ALEN; i += 2) { offset = nvm_alt_mac_addr_offset + (i >> 1); ret_val = hw->nvm.ops.read(hw, offset, 1, &nvm_data); @@ -206,14 +205,16 @@ s32 igb_check_alt_mac_addr(struct e1000_hw *hw) /* if multicast bit is set, the alternate address will not be used */ if (alt_mac_addr[0] & 0x01) { - ret_val = -(E1000_NOT_IMPLEMENTED); + hw_dbg("Ignoring Alternate Mac Address with MC bit set\n"); goto out; } - for (i = 0; i < ETH_ALEN; i++) - hw->mac.addr[i] = hw->mac.perm_addr[i] = alt_mac_addr[i]; - - hw->mac.ops.rar_set(hw, hw->mac.perm_addr, 0); + /* + * We have a valid alternate MAC address, and we want to treat it the + * same as the normal permanent MAC address stored by the HW into the + * RAR. Do this by mapping this address into RAR0. + */ + hw->mac.ops.rar_set(hw, alt_mac_addr, 0); out: return ret_val; -- 2.34.1