From 23a392a44a3cabf43515f7601373a2094ac5f747 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Sat, 4 Dec 2021 17:49:41 +0200
Subject: [PATCH] iwlwifi: implement reset flow for Bz devices
Git-commit: 23a392a44a3cabf43515f7601373a2094ac5f747
Patch-mainline: v5.17-rc1
References: bsc#1202131
On Bz devices, UREG_DOORBELL_TO_ISR6_NMI_BIT no longer actually
triggers an NMI. So instead of setting BIT(0) | BIT(1) for the
reset flow, we need to just set BIT(1) and then force the NMI
in the new way.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211204174546.6b56e7ee1773.I71cba66e17cc0daabc5ad7abd88763674b625c82@changeid
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
index 72b5b69bfe5e..0febdcacbd42 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
@@ -105,9 +105,12 @@ static void iwl_trans_pcie_fw_reset_handshake(struct iwl_trans *trans)
if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210)
iwl_write_umac_prph(trans, UREG_NIC_SET_NMI_DRIVER,
UREG_NIC_SET_NMI_DRIVER_RESET_HANDSHAKE);
- else
+ else if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_AX210)
iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
UREG_DOORBELL_TO_ISR6_RESET_HANDSHAKE);
+ else
+ iwl_write32(trans, CSR_DOORBELL_VECTOR,
+ UREG_DOORBELL_TO_ISR6_RESET_HANDSHAKE);
/* wait 200ms */
ret = wait_event_timeout(trans_pcie->fw_reset_waitq,
--
2.35.3