Commit 1c1093a4 authored by Matthew Vick's avatar Matthew Vick Committed by Jeff Kirsher
Browse files

e1000e: Disable Far-End LoopBack following reset on 80003ES2LAN.

80003ES2LAN has an errata such that far-end loopback may be activated by
bit errors producing a reserved symbol. In order to disable far-end
loopback quickly enough, disable it immediately following a reset.
Signed-off-by: default avatarMatthew Vick <>
Tested-by: default avatarJeff Pieper <>
Signed-off-by: default avatarJeff Kirsher <>
parent 82981930
......@@ -764,6 +764,7 @@ static s32 e1000_reset_hw_80003es2lan(struct e1000_hw *hw)
u32 ctrl;
s32 ret_val;
u16 kum_reg_data;
* Prevent the PCI-E bus from sticking if there is no TLP connection
......@@ -789,6 +790,13 @@ static s32 e1000_reset_hw_80003es2lan(struct e1000_hw *hw)
ew32(CTRL, ctrl | E1000_CTRL_RST);
/* Disable IBIST slave mode (far-end loopback) */
e1000_read_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
kum_reg_data |= E1000_KMRNCTRLSTA_IBIST_DISABLE;
e1000_write_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,
ret_val = e1000e_get_auto_rd_done(hw);
if (ret_val)
/* We don't want to continue accessing MAC registers. */
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