diff mbox series

[06/20] wifi: iwlwifi: pcie: double-check ACK interrupt after timeout

Message ID 20230614123446.00cc2d9b88c3.I429bfe800f17c624e50c0b0c10dd2cd7d885f199@changeid (mailing list archive)
State Accepted
Delegated to: Johannes Berg
Headers show
Series wifi: iwlwifi: updates intended for v6.5 2023-06-14 | expand

Commit Message

Greenman, Gregory June 14, 2023, 9:41 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

There are evidently cases where the firmware completes the
reset but the interrupt isn't received correctly, so check
for the interrupt again after the timeout, and don't dump
the firmware error log if the right bit is set.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
---
 .../net/wireless/intel/iwlwifi/pcie/trans-gen2.c    | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
index 73b395841ca8..fa46dad5fd68 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans-gen2.c
@@ -1,7 +1,7 @@ 
 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
  * Copyright (C) 2017 Intel Deutschland GmbH
- * Copyright (C) 2018-2022 Intel Corporation
+ * Copyright (C) 2018-2023 Intel Corporation
  */
 #include "iwl-trans.h"
 #include "iwl-prph.h"
@@ -117,9 +117,14 @@  static void iwl_trans_pcie_fw_reset_handshake(struct iwl_trans *trans)
 				 trans_pcie->fw_reset_state != FW_RESET_REQUESTED,
 				 FW_RESET_TIMEOUT);
 	if (!ret || trans_pcie->fw_reset_state == FW_RESET_ERROR) {
-		IWL_INFO(trans,
-			 "firmware didn't ACK the reset - continue anyway\n");
-		iwl_trans_fw_error(trans, true);
+		u32 inta_hw = iwl_read32(trans, CSR_MSIX_HW_INT_CAUSES_AD);
+
+		IWL_ERR(trans,
+			"timeout waiting for FW reset ACK (inta_hw=0x%x)\n",
+			inta_hw);
+
+		if (!(inta_hw & MSIX_HW_INT_CAUSES_REG_RESET_DONE))
+			iwl_trans_fw_error(trans, true);
 	}
 
 	trans_pcie->fw_reset_state = FW_RESET_IDLE;