From: Johannes Berg <johannes.berg@xxxxxxxxx>
When the firmware misbehaves (according to the driver), we
often either ignore that, or WARN_ON, which is very noisy
but doesn't really help.
Add a little helper macro IWL_FW_CHECK() that can be used
in place of WARN_ON() in conditions, and make it take a
message that's printed in this case. We can also add more
behaviour to this in the future.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/fw/dbg.h | 16 +++++++++++++++-
drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 4 +++-
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 10 ++++++----
drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 15 ++++++++++++---
4 files changed, 36 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h
index be7806407de8..dcba0eefe70d 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.h
@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
- * Copyright (C) 2005-2014, 2018-2019, 2021-2022 Intel Corporation
+ * Copyright (C) 2005-2014, 2018-2019, 2021-2023 Intel Corporation
* Copyright (C) 2013-2015 Intel Mobile Communications GmbH
* Copyright (C) 2015-2017 Intel Deutschland GmbH
*/
@@ -327,4 +327,18 @@ void iwl_fwrt_dump_error_logs(struct iwl_fw_runtime *fwrt);
void iwl_send_dbg_dump_complete_cmd(struct iwl_fw_runtime *fwrt,
u32 timepoint,
u32 timepoint_data);
+
+#define IWL_FW_CHECK_FAILED(_obj, _fmt, ...) \
+ IWL_ERR_LIMIT(_obj, _fmt, __VA_ARGS__)
+
+#define IWL_FW_CHECK(_obj, _cond, _fmt, ...) \
+ ({ \
+ bool __cond = (_cond); \
+ \
+ if (unlikely(__cond)) \
+ IWL_FW_CHECK_FAILED(_obj, _fmt, __VA_ARGS__); \
+ \
+ unlikely(__cond); \
+ })
+
#endif /* __iwl_fw_dbg_h__ */
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
index cc04d7cad715..5336a4afde4d 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c
@@ -1601,7 +1601,9 @@ static void iwl_mvm_rx_common(struct iwl_mvm *mvm,
if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd))
continue;
- if (unlikely(pkt_len < rx_h->min_size))
+ if (IWL_FW_CHECK(mvm, pkt_len < rx_h->min_size,
+ "unexpected notification 0x%04x size %d, need %d\n",
+ rx_h->cmd_id, pkt_len, rx_h->min_size))
return;
if (rx_h->context == RX_HANDLER_SYNC) {
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index 9d8d9def9391..5c06839b87c2 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -985,10 +985,12 @@ static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1);
rcu_read_unlock();
- if (WARN(tid != baid_data->tid ||
- !(sta_mask & baid_data->sta_mask),
- "baid 0x%x is mapped to sta_mask:0x%x tid:%d, but was received for sta_mask:0x%x tid:%d\n",
- baid, baid_data->sta_mask, baid_data->tid, sta_mask, tid))
+ if (IWL_FW_CHECK(mvm,
+ tid != baid_data->tid ||
+ !(sta_mask & baid_data->sta_mask),
+ "baid 0x%x is mapped to sta_mask:0x%x tid:%d, but was received for sta_mask:0x%x tid:%d\n",
+ baid, baid_data->sta_mask, baid_data->tid,
+ sta_mask, tid))
return false;
nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index 06fb4b72ee9b..a04ce7d555d1 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -2123,7 +2123,8 @@ void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
u16 tfd_cnt;
int i;
- if (unlikely(sizeof(*ba_res) > pkt_len))
+ if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len,
+ "short BA notification (%d)\n", pkt_len))
return;
sta_id = ba_res->sta_id;
@@ -2135,7 +2136,13 @@ void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
(void *)(uintptr_t)ba_res->reduced_txp;
tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
- if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len)
+ if (!tfd_cnt)
+ return;
+
+ if (IWL_FW_CHECK(mvm,
+ struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
+ "short BA notification (tfds:%d, size:%d)\n",
+ tfd_cnt, pkt_len))
return;
rcu_read_lock();
@@ -2193,7 +2200,9 @@ void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
rcu_read_lock();
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
- if (WARN_ON_ONCE(!mvmsta)) {
+ if (IWL_FW_CHECK(mvm, !mvmsta,
+ "invalid STA ID %d in BA notif\n",
+ sta_id)) {
rcu_read_unlock();
return;
}
--
2.38.1
