Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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 <matthew.vick@intel.com>
Tested-by: default avatarJeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 82981930

drivers/net/ethernet/intel/e1000e/80003es2lan.c

+8 −0
Original line number Diff line number Diff line
@@ -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);

	e1000_release_phy_80003es2lan(hw);



	/* Disable IBIST slave mode (far-end loopback) */

	e1000_read_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,

					&kum_reg_data);

	kum_reg_data |= E1000_KMRNCTRLSTA_IBIST_DISABLE;

	e1000_write_kmrn_reg_80003es2lan(hw, E1000_KMRNCTRLSTA_INBAND_PARAM,

					 kum_reg_data);



	ret_val = e1000e_get_auto_rd_done(hw);

	if (ret_val)

		/* We don't want to continue accessing MAC registers. */