linux-kernel - [PATCH 5.15 30/32] e1000e: Handshake with CSME starts from ADL platforms

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Message-Id: <20220204091916.244764690@linuxfoundation.org>
Date:   Fri,  4 Feb 2022 10:22:40 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sasha Neftin <sasha.neftin@...el.com>,
        Nechama Kraus <nechamax.kraus@...ux.intel.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>
Subject: [PATCH 5.15 30/32] e1000e: Handshake with CSME starts from ADL platforms

From: Sasha Neftin <sasha.neftin@...el.com>

commit cad014b7b5a6897d8c4fad13e2888978bfb7a53f upstream.

Handshake with CSME/AMT on none provisioned platforms during S0ix flow
is not supported on TGL platform and can cause to HW unit hang. Update
the handshake with CSME flow to start from the ADL platform.

Fixes: 3e55d231716e ("e1000e: Add handshake with the CSME to support S0ix")
Signed-off-by: Sasha Neftin <sasha.neftin@...el.com>
Tested-by: Nechama Kraus <nechamax.kraus@...ux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/intel/e1000e/netdev.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -6346,7 +6346,8 @@ static void e1000e_s0ix_entry_flow(struc
 	u32 mac_data;
 	u16 phy_data;
 
-	if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID) {
+	if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID &&
+	    hw->mac.type >= e1000_pch_adp) {
 		/* Request ME configure the device for S0ix */
 		mac_data = er32(H2ME);
 		mac_data |= E1000_H2ME_START_DPG;
@@ -6495,7 +6496,8 @@ static void e1000e_s0ix_exit_flow(struct
 	u16 phy_data;
 	u32 i = 0;
 
-	if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID) {
+	if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID &&
+	    hw->mac.type >= e1000_pch_adp) {
 		/* Request ME unconfigure the device from S0ix */
 		mac_data = er32(H2ME);
 		mac_data &= ~E1000_H2ME_START_DPG;