[PATCH 10/15] wifi: iwlwifi: be less noisy if the NIC is dead in S3

[Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>]

From: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>

If the NIC is dead upon resume, try to catch the error earlier and exit
earlier. We'll print less error messages and get to the same recovery
path as before: reload the firmware.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
---
 drivers/net/wireless/intel/iwlwifi/fw/dump.c   | 11 ++++++++---
 drivers/net/wireless/intel/iwlwifi/iwl-trans.h | 13 +++++++------
 drivers/net/wireless/intel/iwlwifi/mvm/d3.c    | 18 +++++++++++++-----
 .../net/wireless/intel/iwlwifi/pcie/trans.c    |  2 ++
 4 files changed, 30 insertions(+), 14 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dump.c b/drivers/net/wireless/intel/iwlwifi/fw/dump.c
index 3cabdeb53e99..8e0c85a1240d 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dump.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dump.c
@@ -537,13 +537,18 @@ bool iwl_fwrt_read_err_table(struct iwl_trans *trans, u32 base, u32 *err_id)
 		/* cf. struct iwl_error_event_table */
 		u32 valid;
 		__le32 err_id;
-	} err_info;
+	} err_info = {};
+	int ret;
 
 	if (!base)
 		return false;
 
-	iwl_trans_read_mem_bytes(trans, base,
-				 &err_info, sizeof(err_info));
+	ret = iwl_trans_read_mem_bytes(trans, base,
+				       &err_info, sizeof(err_info));
+
+	if (ret)
+		return true;
+
 	if (err_info.valid && err_id)
 		*err_id = le32_to_cpu(err_info.err_id);
 
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
index e95ffe303547..c70da7281551 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
@@ -1074,12 +1074,13 @@ int iwl_trans_read_config32(struct iwl_trans *trans, u32 ofs,
 void iwl_trans_debugfs_cleanup(struct iwl_trans *trans);
 #endif
 
-#define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize)		      \
-	do {								      \
-		if (__builtin_constant_p(bufsize))			      \
-			BUILD_BUG_ON((bufsize) % sizeof(u32));		      \
-		iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\
-	} while (0)
+#define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize)	\
+	({							\
+		if (__builtin_constant_p(bufsize))		\
+			BUILD_BUG_ON((bufsize) % sizeof(u32));	\
+		iwl_trans_read_mem(trans, addr, buf,		\
+				   (bufsize) / sizeof(u32));	\
+	})
 
 int iwl_trans_write_imr_mem(struct iwl_trans *trans, u32 dst_addr,
 			    u64 src_addr, u32 byte_cnt);
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
index fae9eabfa56e..a6082150deab 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
@@ -3107,7 +3107,6 @@ static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
 		ieee80211_resume_disconnect(vif);
 }
 
-
 static bool iwl_mvm_check_rt_status(struct iwl_mvm *mvm,
 				   struct ieee80211_vif *vif)
 {
@@ -3706,22 +3705,31 @@ int iwl_mvm_fast_resume(struct iwl_mvm *mvm)
 	iwl_fw_dbg_read_d3_debug_data(&mvm->fwrt);
 
 	if (iwl_mvm_check_rt_status(mvm, NULL)) {
+		IWL_ERR(mvm,
+			"iwl_mvm_check_rt_status failed, device is gone during suspend\n");
 		set_bit(STATUS_FW_ERROR, &mvm->trans->status);
 		iwl_mvm_dump_nic_error_log(mvm);
 		iwl_dbg_tlv_time_point(&mvm->fwrt,
 				       IWL_FW_INI_TIME_POINT_FW_ASSERT, NULL);
 		iwl_fw_dbg_collect_desc(&mvm->fwrt, &iwl_dump_desc_assert,
 					false, 0);
-		return -ENODEV;
+		mvm->trans->state = IWL_TRANS_NO_FW;
+		ret = -ENODEV;
+
+		goto out;
 	}
 	ret = iwl_mvm_d3_notif_wait(mvm, &d3_data);
+
+	if (ret) {
+		IWL_ERR(mvm, "Couldn't get the d3 notif %d\n", ret);
+		mvm->trans->state = IWL_TRANS_NO_FW;
+	}
+
+out:
 	clear_bit(IWL_MVM_STATUS_IN_D3, &mvm->status);
 	mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
 	mvm->fast_resume = false;
 
-	if (ret)
-		IWL_ERR(mvm, "Couldn't get the d3 notif %d\n", ret);
-
 	return ret;
 }
 
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
index 3b9943eb6934..d19b3bd0866b 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
@@ -1643,6 +1643,8 @@ int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
 out:
 	if (*status == IWL_D3_STATUS_ALIVE)
 		ret = iwl_pcie_d3_handshake(trans, false);
+	else
+		trans->state = IWL_TRANS_NO_FW;
 
 	return ret;
 }
-- 
2.34.1