* [PATCH wireless-next 03/28] wifi: iwlwifi: mld: Add check for null vif in stats callback.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
A crash was seen in this area, protect against null.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/stats.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/stats.c b/drivers/net/wireless/intel/iwlwifi/mld/stats.c
index 7b8709716324..8d6bd7219b94 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/stats.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/stats.c
@@ -415,7 +415,7 @@ iwl_mld_process_per_link_stats(struct iwl_mld *mld,
bss_conf = wiphy_dereference(mld->wiphy,
mld->fw_id_to_bss_conf[fw_id]);
- if (!bss_conf || bss_conf->vif->type != NL80211_IFTYPE_STATION)
+ if (!bss_conf || !bss_conf->vif || bss_conf->vif->type != NL80211_IFTYPE_STATION)
continue;
link_stats = &per_link[fw_id];
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 01/28] wifi: iwlwifi: mld: Check for NULL before lookup.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Do not call iwl_mld_sta_from_mac80211(sta) unless we have
verified sta is non NULL.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/agg.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/agg.c b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
index 3bf36f8f6874..a757077b0a7a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/agg.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
@@ -194,7 +194,7 @@ iwl_mld_reorder(struct iwl_mld *mld, struct napi_struct *napi,
struct iwl_mld_baid_data *baid_data;
struct iwl_mld_reorder_buffer *buffer;
struct iwl_mld_reorder_buf_entry *entries;
- struct iwl_mld_sta *mld_sta = iwl_mld_sta_from_mac80211(sta);
+ struct iwl_mld_sta *mld_sta;
struct iwl_mld_link_sta *mld_link_sta;
u32 reorder = le32_to_cpu(desc->reorder_data);
bool amsdu, last_subframe, is_old_sn, is_dup;
@@ -221,6 +221,8 @@ iwl_mld_reorder(struct iwl_mld *mld, struct napi_struct *napi,
"Got valid BAID without a valid station assigned\n"))
return IWL_MLD_PASS_SKB;
+ mld_sta = iwl_mld_sta_from_mac80211(sta);
+
/* not a data packet */
if (!ieee80211_is_data_qos(hdr->frame_control) ||
is_multicast_ether_addr(hdr->addr1))
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 00/28] iwlwifi + mac80211 stability
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
From: Ben Greear <greearb@candelatech.com>
mac80211 and iwlwifi stability patches from our internal
tree.
General test case is 40 be200 radios attempting to connect and
run max traffic against an AP that doesn't really like that many
eMLSR stations. Firmware crashes, AP rejections, assoc timeouts,
and other problems are seen often, and that seems to hit a lot
of edge cases. Kernel has kasan, lockdep and other debugging
enabled.
This was primarily tested against 6.18.14 stable kernel, but has been
revised to work against wireless-next and it is passing at least the
first hour of tests so far. Likely some problems still remain in
this area.
checkpatch seems mostly satisfied.
Ben Greear (28):
wifi: iwlwifi: mld: Check for NULL before lookup.
wifi: iwlwifi: mld: Fix un-set return value in error case.
wifi: iwlwifi: mld: Add check for null vif in stats callback.
wifi: mac80211: Check debugfs creation return values.
wifi: mac80211: do not fail taking sta to lower state.
wifi: mac80211: Mark sta as uploaded if single transition succeeds.
wifi: mac80211: Fix use-after-free of debugfs inodes.
wifi: mac80211: Debugfs safety checks.
wifi: mac80211: Use warn-on-once in drv_remove_chanctxt
wifi: mac80211: Ensure sta debugfs is not double-freed.
wifi: iwlwifi: mld: Fix stale reference in fw_id_to_link_sta
wifi: iwlwifi: mld: Improve logging in error cases.
wifi: iwlwifi: mld: Remove warning about BAID.
wifi: mac80211: Add dmesg log regarding warn-on in drv-stop.
wifi: iwlwifi: mld: Fix use-after-free of bss_conf
wifi: iwlwifi: mld: Check for null in iwl_mld_wait_sta_txqs_empty
wifi: iwlwifi: mld: use warn-on-once in error path.
wifi: iwlwifi: mld: Use warn-on-once in emlsr exit logic.
wifi: iwlwifi: mld: Improve error message in rx path.
wifi: iwlwifi: mld: Improve logging message.
wifi: iwlwifi: mld: Protect from null mld_sta
wifi: mac80211: Add force-cleanup call to driver.
wifi: iwlwifi: mld: Support force-cleanup op
wifi: iwlwifi: mld: Fix NPE in flush logic.
wifi: iwlwifi: mld: Fix bad return address in tx code.
wifi: mac80211: Ensure link work-items are only initialized once.
wifi: iwlwifi: mld: Convert to WARN_ONCE in link removal path.
wifi: mac80211: Decrease WARN spam.
drivers/net/wireless/intel/iwlwifi/mld/agg.c | 20 +++-
drivers/net/wireless/intel/iwlwifi/mld/link.c | 42 +++++--
.../net/wireless/intel/iwlwifi/mld/mac80211.c | 21 +++-
drivers/net/wireless/intel/iwlwifi/mld/mlo.c | 5 +-
drivers/net/wireless/intel/iwlwifi/mld/rx.c | 4 +-
drivers/net/wireless/intel/iwlwifi/mld/sta.c | 20 +++-
drivers/net/wireless/intel/iwlwifi/mld/sta.h | 2 +-
.../net/wireless/intel/iwlwifi/mld/stats.c | 2 +-
drivers/net/wireless/intel/iwlwifi/mld/tx.h | 2 +
include/net/mac80211.h | 7 ++
net/mac80211/debugfs.c | 11 ++
net/mac80211/debugfs_key.c | 6 +
net/mac80211/debugfs_netdev.c | 106 +++++++++++++++++-
net/mac80211/debugfs_sta.c | 15 +++
net/mac80211/driver-ops.c | 10 +-
net/mac80211/driver-ops.h | 12 +-
net/mac80211/ieee80211_i.h | 1 +
net/mac80211/link.c | 29 +++--
net/mac80211/sta_info.c | 8 +-
net/mac80211/util.c | 8 +-
20 files changed, 286 insertions(+), 45 deletions(-)
--
2.42.0
^ permalink raw reply
* [PATCH wireless-next 02/28] wifi: iwlwifi: mld: Fix un-set return value in error case.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Ensure 'err' is set in error return path.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/mac80211.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
index 0c53d6bd9651..d44ec81d2ce4 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
@@ -2519,7 +2519,7 @@ iwl_mld_change_vif_links(struct ieee80211_hw *hw,
struct ieee80211_bss_conf *link_conf;
u16 removed = old_links & ~new_links;
u16 added = new_links & ~old_links;
- int err;
+ int err = -EINVAL;
lockdep_assert_wiphy(mld->wiphy);
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 11/28] wifi: iwlwifi: mld: Fix stale reference in fw_id_to_link_sta
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
If memory cannot be allocated, clear the fw_id_to_link_sta so there
is not a dangling pointer that may later be accessed and cause
use-after-free.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/sta.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/sta.c b/drivers/net/wireless/intel/iwlwifi/mld/sta.c
index 6b7a89e050e6..c478cee570a2 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/sta.c
@@ -540,8 +540,10 @@ iwl_mld_add_link_sta(struct iwl_mld *mld, struct ieee80211_link_sta *link_sta)
mld_link_sta = &mld_sta->deflink;
} else {
mld_link_sta = kzalloc_obj(*mld_link_sta);
- if (!mld_link_sta)
+ if (!mld_link_sta) {
+ RCU_INIT_POINTER(mld->fw_id_to_link_sta[fw_id], NULL);
return -ENOMEM;
+ }
}
mld_link_sta->fw_id = fw_id;
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 08/28] wifi: mac80211: Debugfs safety checks.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Safety checks in case links are not be properly cleaned up at
the time we are removing netdev debugfs. Since link debugfs
is child of netdev debugfs, and we are about to recursively clean
up the netdev tree, be sure to null out any debugfs inode pointers
in the child links.
Root cause of the inode use-after-free is something
different, but this patch may also make system more resiliant.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
net/mac80211/debugfs_netdev.c | 30 ++++++++++++++++++++++++++++--
1 file changed, 28 insertions(+), 2 deletions(-)
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index bc2da35db4ae..000859b8c005 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -1037,9 +1037,33 @@ static void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata,
add_link_files(&sdata->deflink, sdata->vif.debugfs_dir);
}
+static void
+ieee80211_debugfs_clear_link_ptr(struct ieee80211_sub_if_data *sdata,
+ struct dentry *dir)
+{
+ struct ieee80211_link_data *link;
+ int i;
+
+ rcu_read_lock();
+
+ if (sdata->vif.debugfs_dir == dir)
+ sdata->vif.debugfs_dir = NULL;
+
+ for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
+ link = rcu_access_pointer(sdata->link[i]);
+ if (!link)
+ continue;
+
+ if (dir == link->debugfs_dir)
+ link->debugfs_dir = NULL;
+ }
+ rcu_read_unlock();
+}
+
void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_link_data *link;
+ struct dentry *dir;
int i;
if (!sdata->vif.debugfs_dir)
@@ -1061,8 +1085,10 @@ void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
}
rcu_read_unlock();
- debugfs_remove_recursive(sdata->vif.debugfs_dir);
+ dir = sdata->vif.debugfs_dir;
+ debugfs_remove_recursive(dir);
sdata->vif.debugfs_dir = NULL;
+ ieee80211_debugfs_clear_link_ptr(sdata, dir);
sdata->debugfs.subdir_stations = NULL;
}
@@ -1151,7 +1177,7 @@ void ieee80211_link_debugfs_drv_remove(struct ieee80211_link_data *link)
/* Recreate the directory excluding the driver data */
debugfs_remove_recursive(link->debugfs_dir);
- link->debugfs_dir = NULL;
+ ieee80211_debugfs_clear_link_ptr(link->sdata, link->debugfs_dir);
ieee80211_link_debugfs_add(link);
}
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 06/28] wifi: mac80211: Mark sta as uploaded if single transition succeeds.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
The hope is that this would allow cleanup code to run properly in
case this fails halfway through.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
net/mac80211/sta_info.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 4259e9c13ed7..ad211c714dbb 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -836,18 +836,18 @@ static int sta_info_insert_drv_state(struct ieee80211_local *local,
err = drv_sta_state(local, sdata, sta, state, state + 1);
if (err)
break;
- }
-
- if (!err) {
/*
* Drivers using legacy sta_add/sta_remove callbacks only
* get uploaded set to true after sta_add is called.
+ * We are at least somewhat added now.
*/
if (!local->ops->sta_add)
sta->uploaded = true;
- return 0;
}
+ if (!err)
+ return 0;
+
if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
sdata_info(sdata,
"failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 04/28] wifi: mac80211: Check debugfs creation return values.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Add return error checking for the debugfs directory create
calls. Assign error pointers to NULL instead of potential error
codes that the create logic may return.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
net/mac80211/debugfs.c | 11 +++++++++++
net/mac80211/debugfs_key.c | 6 ++++++
net/mac80211/debugfs_netdev.c | 33 +++++++++++++++++++++++++++++++++
net/mac80211/debugfs_sta.c | 15 +++++++++++++++
4 files changed, 65 insertions(+)
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index e8d0a8b71d59..1f428f8a7633 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -680,6 +680,12 @@ void debugfs_hw_add(struct ieee80211_local *local)
return;
local->debugfs.keys = debugfs_create_dir("keys", phyd);
+ if (IS_ERR(local->debugfs.keys)) {
+ pr_err("Failed to create local keys debugfs dir, rv: %ld phyd: 0x%px\n",
+ (long)(local->debugfs.keys), phyd);
+ local->debugfs.keys = NULL;
+ return;
+ }
DEBUGFS_ADD(total_ps_buffered);
DEBUGFS_ADD(wep_iv);
@@ -705,6 +711,11 @@ void debugfs_hw_add(struct ieee80211_local *local)
phyd, &local->aql_threshold);
statsd = debugfs_create_dir("statistics", phyd);
+ if (IS_ERR(statsd)) {
+ pr_err("Failed to create local stats debugfs dir, rv: %ld phyd: 0x%px\n",
+ (long)(statsd), phyd);
+ return;
+ }
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
index 117f58af5ff9..670bcfa8c4ed 100644
--- a/net/mac80211/debugfs_key.c
+++ b/net/mac80211/debugfs_key.c
@@ -335,6 +335,12 @@ void ieee80211_debugfs_key_add(struct ieee80211_key *key)
keycount++;
key->debugfs.dir = debugfs_create_dir(buf,
key->local->debugfs.keys);
+ if (IS_ERR(key->debugfs.dir)) {
+ pr_err("Failed to create key debugfs dir, rv: %ld phyd: 0x%px\n",
+ (long)(key->debugfs.dir), key->local->debugfs.keys);
+ key->debugfs.dir = NULL;
+ return;
+ }
sta = key->sta;
if (sta) {
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index f3c6a41e4911..51d2ae232a85 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -882,6 +882,11 @@ static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
{
struct dentry *dir = debugfs_create_dir("mesh_stats",
sdata->vif.debugfs_dir);
+ if (IS_ERR(dir)) {
+ sdata_err(sdata, "Failed to create mesh stats dir, rv: %ld vif dir: 0x%px\n",
+ (long)(dir), sdata->vif.debugfs_dir);
+ return;
+ }
#define MESHSTATS_ADD(name)\
debugfs_create_file(#name, 0400, dir, sdata, &name##_ops)
@@ -897,6 +902,11 @@ static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
{
struct dentry *dir = debugfs_create_dir("mesh_config",
sdata->vif.debugfs_dir);
+ if (IS_ERR(dir)) {
+ sdata_err(sdata, "Failed to create mesh config dir, rv: %ld vif dir: 0x%px\n",
+ (long)(dir), sdata->vif.debugfs_dir);
+ return;
+ }
#define MESHPARAMS_ADD(name) \
debugfs_create_file(#name, 0600, dir, sdata, &name##_ops)
@@ -1003,10 +1013,25 @@ static void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata,
sprintf(buf, "netdev:%s", sdata->name);
sdata->vif.debugfs_dir = debugfs_create_dir(buf,
sdata->local->hw.wiphy->debugfsdir);
+
+ if (IS_ERR(sdata->vif.debugfs_dir)) {
+ sdata_err(sdata, "Failed to create netdev dir, rv: %ld name: %s wiphy dir: 0x%px\n",
+ (long)(sdata->vif.debugfs_dir), buf, sdata->local->hw.wiphy->debugfsdir);
+ sdata->vif.debugfs_dir = NULL;
+ return;
+ }
+
/* deflink also has this */
sdata->deflink.debugfs_dir = sdata->vif.debugfs_dir;
+
sdata->debugfs.subdir_stations = debugfs_create_dir("stations",
sdata->vif.debugfs_dir);
+ if (IS_ERR(sdata->debugfs.subdir_stations)) {
+ sdata_err(sdata, "Failed to create netdev subdir-stations dir, rv: %ld wiphy dir: 0x%px\n",
+ (long)(sdata->debugfs.subdir_stations), sdata->vif.debugfs_dir);
+ sdata->debugfs.subdir_stations = NULL;
+ return;
+ }
add_files(sdata);
if (!mld_vif)
add_link_files(&sdata->deflink, sdata->vif.debugfs_dir);
@@ -1058,6 +1083,14 @@ void ieee80211_link_debugfs_add(struct ieee80211_link_data *link)
debugfs_create_dir(link_dir_name,
link->sdata->vif.debugfs_dir);
+ if (IS_ERR(link->debugfs_dir)) {
+ sdata_err(link->sdata, "Failed to create debugfs dir, rv: %ld link-dir-name: %s vif dir: 0x%px\n",
+ (long)(link->debugfs_dir), link_dir_name,
+ link->sdata->vif.debugfs_dir);
+ link->debugfs_dir = NULL;
+ return;
+ }
+
DEBUGFS_ADD(link->debugfs_dir, addr);
add_link_files(link, link->debugfs_dir);
}
diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index ef75255d47d5..23cb2099e3b3 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -1250,6 +1250,12 @@ void ieee80211_sta_debugfs_add(struct sta_info *sta)
* dir might still be around.
*/
sta->debugfs_dir = debugfs_create_dir(mac, stations_dir);
+ if (IS_ERR(sta->debugfs_dir)) {
+ sdata_err(sdata, "Failed to create sta debugfs dir, rv: %ld name: %s stations dir: 0x%px\n",
+ (long)(sta->debugfs_dir), mac, stations_dir);
+ sta->debugfs_dir = NULL;
+ return;
+ }
DEBUGFS_ADD(flags);
DEBUGFS_ADD(aid);
@@ -1303,6 +1309,15 @@ void ieee80211_link_sta_debugfs_add(struct link_sta_info *link_sta)
debugfs_create_dir(link_dir_name,
link_sta->sta->debugfs_dir);
+ if (IS_ERR(link_sta->debugfs_dir)) {
+ sdata_err(link_sta->sta->sdata,
+ "Failed to create link-sta debugfs dir, rv: %ld name: %s stations dir: 0x%px\n",
+ (long)(link_sta->debugfs_dir), link_dir_name,
+ link_sta->sta->debugfs_dir);
+ link_sta->debugfs_dir = NULL;
+ return;
+ }
+
DEBUGFS_ADD(addr);
} else {
if (WARN_ON(link_sta != &link_sta->sta->deflink))
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 05/28] wifi: mac80211: do not fail taking sta to lower state.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
If sdata-in-driver-check fails, then we assume STA is definitely
not in the driver, and so going to less connected states should not
fail.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
net/mac80211/driver-ops.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c
index 49753b73aba2..59998d0af3ff 100644
--- a/net/mac80211/driver-ops.c
+++ b/net/mac80211/driver-ops.c
@@ -143,8 +143,12 @@ int drv_sta_state(struct ieee80211_local *local,
lockdep_assert_wiphy(local->hw.wiphy);
sdata = get_bss_sdata(sdata);
- if (!check_sdata_in_driver(sdata))
+ if (!check_sdata_in_driver(sdata)) {
+ /* Going down should not fail in this case. */
+ if (new_state < old_state)
+ return 0;
return -EIO;
+ }
trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
if (local->ops->sta_state) {
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 09/28] wifi: mac80211: Use warn-on-once in drv_remove_chanctxt
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
But still log it to dmesg.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
net/mac80211/driver-ops.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 51bf3c7822a7..e2283d7dcd1e 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -1035,8 +1035,10 @@ static inline void drv_remove_chanctx(struct ieee80211_local *local,
might_sleep();
lockdep_assert_wiphy(local->hw.wiphy);
- if (WARN_ON(!ctx->driver_present))
+ if (WARN_ON_ONCE(!ctx->driver_present)) {
+ pr_err("drv-remove-chanctx, NOT driver_present, not sending request to driver.");
return;
+ }
trace_drv_remove_chanctx(local, ctx);
if (local->ops->remove_chanctx)
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 14/28] wifi: mac80211: Add dmesg log regarding warn-on in drv-stop.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
And make it WARN_ON_ONCE.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
net/mac80211/driver-ops.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c
index 59998d0af3ff..397a0281412a 100644
--- a/net/mac80211/driver-ops.c
+++ b/net/mac80211/driver-ops.c
@@ -38,8 +38,10 @@ void drv_stop(struct ieee80211_local *local, bool suspend)
might_sleep();
lockdep_assert_wiphy(local->hw.wiphy);
- if (WARN_ON(!local->started))
+ if (WARN_ON_ONCE(!local->started)) {
+ pr_err("mac80211: drv-stop called but local is not started.\n");
return;
+ }
trace_drv_stop(local, suspend);
local->ops->stop(&local->hw, suspend);
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 23/28] wifi: iwlwifi: mld: Support force-cleanup op
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
This lets mac80211 force the driver to clean up any lingering
configuration, fixing use-after-free in case of unrecoverable
hardware failure.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/mac80211.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
index badaceb120b3..03810291ed33 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
@@ -560,6 +560,18 @@ iwl_mld_restart_cleanup(struct iwl_mld *mld)
iwl_mld_ftm_restart_cleanup(mld);
}
+/* mac80211 thinks our driver/firmware/hardware has crashed
+ * and cannot be recovered. Force clean any existing configuration
+ * (stas, etc), as mac80211 will not attempt further cleanup.
+ */
+static void iwl_mld_mac80211_force_cleanup(struct ieee80211_hw *hw)
+{
+ struct iwl_mld *mld = IWL_MAC80211_GET_MLD(hw);
+
+ IWL_ERR(mld, "mac80211-force-cleanup called, calling mld_restart_cleanup.\n");
+ iwl_mld_restart_cleanup(mld);
+}
+
static
int iwl_mld_mac80211_start(struct ieee80211_hw *hw)
{
@@ -2717,6 +2729,7 @@ const struct ieee80211_ops iwl_mld_hw_ops = {
.config = iwl_mld_mac80211_config,
.get_antenna = iwl_mld_get_antenna,
.set_antenna = iwl_mld_set_antenna,
+ .force_cleanup = iwl_mld_mac80211_force_cleanup,
.add_interface = iwl_mld_mac80211_add_interface,
.remove_interface = iwl_mld_mac80211_remove_interface,
.conf_tx = iwl_mld_mac80211_conf_tx,
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 19/28] wifi: iwlwifi: mld: Improve error message in rx path.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Print return code that is causing the failure path.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/rx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/rx.c b/drivers/net/wireless/intel/iwlwifi/mld/rx.c
index 214dcfde2fb4..f5c20a3aa869 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/rx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/rx.c
@@ -2204,8 +2204,8 @@ void iwl_mld_sync_rx_queues(struct iwl_mld *mld,
ret = wait_event_timeout(mld->rxq_sync.waitq,
READ_ONCE(mld->rxq_sync.state) == 0,
SYNC_RX_QUEUE_TIMEOUT);
- WARN_ONCE(!ret, "RXQ sync failed: state=0x%lx, cookie=%d\n",
- mld->rxq_sync.state, mld->rxq_sync.cookie);
+ WARN_ONCE(!ret, "RXQ sync failed: state=0x%lx, cookie=%d, ret: %d\n",
+ mld->rxq_sync.state, mld->rxq_sync.cookie, ret);
out:
mld->rxq_sync.state = 0;
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 07/28] wifi: mac80211: Fix use-after-free of debugfs inodes.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
When recursively removing debugfs files, clean up child link
debugfs pointers since the recursive removal will have deleted
their memory. This fixes use-after-free problem when those child
links are eventually cleaned up.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
net/mac80211/debugfs_netdev.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 51d2ae232a85..bc2da35db4ae 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -1039,9 +1039,28 @@ static void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata,
void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
{
+ struct ieee80211_link_data *link;
+ int i;
+
if (!sdata->vif.debugfs_dir)
return;
+ /* In case where there were errors on station creation and maybe
+ * teardown, we may get here with some links still active. We are
+ * about to recursively delete debugfs, so remove any pointers the
+ * links may have.
+ */
+ rcu_read_lock();
+
+ for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
+ link = rcu_access_pointer(sdata->link[i]);
+ if (!link)
+ continue;
+
+ link->debugfs_dir = NULL;
+ }
+ rcu_read_unlock();
+
debugfs_remove_recursive(sdata->vif.debugfs_dir);
sdata->vif.debugfs_dir = NULL;
sdata->debugfs.subdir_stations = NULL;
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 17/28] wifi: iwlwifi: mld: use warn-on-once in error path.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Just splat a WARNING once, and add debug output to indicate
a bit about why it is hitting the warn path.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/agg.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/agg.c b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
index 23d55374ef8a..413a8688e4eb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/agg.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
@@ -496,7 +496,9 @@ static void iwl_mld_free_reorder_buffer(struct iwl_mld *mld,
* sync internal DELBA notification should trigger a release
* of all frames in the reorder buffer.
*/
- WARN_ON(1);
+ WARN_ON_ONCE(1);
+ IWL_ERR(mld, "free-reorder-buffer problem, rxq: %d num-stored: %d, will purge frames\n",
+ i, reorder_buf->num_stored);
for (int j = 0; j < data->buf_size; j++)
__skb_queue_purge(&entries[j].frames);
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 12/28] wifi: iwlwifi: mld: Improve logging in error cases.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
To give better understanding of how and when failures
happen.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/sta.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/sta.c b/drivers/net/wireless/intel/iwlwifi/mld/sta.c
index c478cee570a2..6338ca46f68e 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/sta.c
@@ -574,7 +574,8 @@ static int iwl_mld_rm_sta_from_fw(struct iwl_mld *mld, u8 fw_sta_id)
WIDE_ID(MAC_CONF_GROUP, STA_REMOVE_CMD),
&cmd);
if (ret)
- IWL_ERR(mld, "Failed to remove station. Id=%d\n", fw_sta_id);
+ IWL_ERR(mld, "Failed to remove station. Id=%d ret: %d\n",
+ fw_sta_id, ret);
return ret;
}
@@ -735,8 +736,10 @@ int iwl_mld_add_sta(struct iwl_mld *mld, struct ieee80211_sta *sta,
int ret;
ret = iwl_mld_init_sta(mld, sta, vif, type);
- if (ret)
+ if (ret) {
+ IWL_ERR(mld, "iwl-mld-add-sta, mld-init-sta failed. ret=%d\n", ret);
return ret;
+ }
/* We could have add only the deflink link_sta, but it will not work
* in the restart case if the single link that is active during
@@ -744,8 +747,10 @@ int iwl_mld_add_sta(struct iwl_mld *mld, struct ieee80211_sta *sta,
*/
for_each_sta_active_link(mld_sta->vif, sta, link_sta, link_id) {
ret = iwl_mld_add_link_sta(mld, link_sta);
- if (ret)
+ if (ret) {
+ IWL_ERR(mld, "iwl-mld-add-sta, mld-add-link-sta failed. ret=%d\n", ret);
goto destroy_sta;
+ }
}
return 0;
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 10/28] wifi: mac80211: Ensure sta debugfs is not double-freed.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
I saw an instance where use-after-free was found when attempting to
delete sta's debugfs. Add check to netdev debugfs free logic to ensure
any sta's that still exist have nulled out debugfs entries since
netdev is going to do a recursive debugfs delete.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
net/mac80211/debugfs_netdev.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 000859b8c005..2e4bc34e6c5c 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -1063,6 +1063,8 @@ ieee80211_debugfs_clear_link_ptr(struct ieee80211_sub_if_data *sdata,
void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_link_data *link;
+ struct rhashtable_iter hti;
+ struct sta_info *sta;
struct dentry *dir;
int i;
@@ -1083,6 +1085,28 @@ void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
link->debugfs_dir = NULL;
}
+
+ /* And, same for all stations. See ieee80211_sta_debugfs_add where
+ * they are added to the sdata->debugfs.subdir_stations directory
+ */
+ rhashtable_walk_enter(&sdata->local->sta_hash.ht, &hti);
+ rhashtable_walk_start(&hti);
+
+ while ((sta = rhashtable_walk_next(&hti))) {
+ if (IS_ERR(sta)) {
+ if (PTR_ERR(sta) != -EAGAIN)
+ break;
+ continue;
+ }
+ if (sta->sdata != sdata)
+ continue;
+
+ sta->debugfs_dir = NULL;
+ }
+
+ rhashtable_walk_stop(&hti);
+ rhashtable_walk_exit(&hti);
+
rcu_read_unlock();
dir = sdata->vif.debugfs_dir;
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 27/28] wifi: iwlwifi: mld: Convert to WARN_ONCE in link removal path.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
While the comment indicates this should not happen, it does at least
when firmware is being problematic. Change to WARN_ON_ONCE to
decrease log spam.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/sta.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/sta.h b/drivers/net/wireless/intel/iwlwifi/mld/sta.h
index 1897b121aae2..44c54e6d68e6 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/sta.h
+++ b/drivers/net/wireless/intel/iwlwifi/mld/sta.h
@@ -170,7 +170,7 @@ iwl_mld_cleanup_sta(void *data, struct ieee80211_sta *sta)
continue;
/* Should not happen as link removal should always succeed */
- WARN_ON(1);
+ WARN_ON_ONCE(1);
RCU_INIT_POINTER(mld_sta->link[link_id], NULL);
RCU_INIT_POINTER(mld_sta->mld->fw_id_to_link_sta[mld_link_sta->fw_id],
NULL);
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 21/28] wifi: iwlwifi: mld: Protect from null mld_sta
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Torture tests were crashing here, protect against a null
mld_sta.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/mac80211.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
index aa4d391ffc00..badaceb120b3 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
@@ -1911,6 +1911,7 @@ static void iwl_mld_mac80211_flush(struct ieee80211_hw *hw,
iwl_mld_add_txq_list(mld);
for (int i = 0; i < mld->fw->ucode_capa.num_stations; i++) {
+ struct iwl_mld_sta *mld_sta;
struct ieee80211_link_sta *link_sta =
wiphy_dereference(mld->wiphy,
mld->fw_id_to_link_sta[i]);
@@ -1919,7 +1920,8 @@ static void iwl_mld_mac80211_flush(struct ieee80211_hw *hw,
continue;
/* Check that the sta belongs to the given vif */
- if (vif && vif != iwl_mld_sta_from_mac80211(link_sta->sta)->vif)
+ mld_sta = iwl_mld_sta_from_mac80211(link_sta->sta);
+ if (vif && (!mld_sta || vif != mld_sta->vif))
continue;
if (drop)
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 25/28] wifi: iwlwifi: mld: Fix bad return address in tx code.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
iwl_mld_txq_from_mac80211 was returning the offset into
txq without checking if txq was NULL. In case txq is
NULL, this would return a small, but non NULL pointer.
The safety check in calling code would then treat it
as non-null and attempt to dereference.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/tx.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/tx.h b/drivers/net/wireless/intel/iwlwifi/mld/tx.h
index 520f15f9d33c..8b0da098c25f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/tx.h
+++ b/drivers/net/wireless/intel/iwlwifi/mld/tx.h
@@ -45,6 +45,8 @@ static inline void iwl_mld_init_txq(struct iwl_mld_txq *mld_txq)
static inline struct iwl_mld_txq *
iwl_mld_txq_from_mac80211(struct ieee80211_txq *txq)
{
+ if (!txq)
+ return NULL;
return (void *)txq->drv_priv;
}
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 16/28] wifi: iwlwifi: mld: Check for null in iwl_mld_wait_sta_txqs_empty
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
I saw some crashes here in eMLSR torture test, looks like mld_txq
was NULL, so add check.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/sta.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/sta.c b/drivers/net/wireless/intel/iwlwifi/mld/sta.c
index 6338ca46f68e..288fc4b7604e 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/sta.c
@@ -789,7 +789,7 @@ void iwl_mld_wait_sta_txqs_empty(struct iwl_mld *mld, struct ieee80211_sta *sta)
struct iwl_mld_txq *mld_txq =
iwl_mld_txq_from_mac80211(sta->txq[i]);
- if (!mld_txq->status.allocated)
+ if (!mld_txq || !mld_txq->status.allocated)
continue;
iwl_trans_wait_txq_empty(mld->trans, mld_txq->fw_id);
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 18/28] wifi: iwlwifi: mld: Use warn-on-once in emlsr exit logic.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Only splat warning once, and improve logging to indicate more
about why it is in the problem state.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/mlo.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/mlo.c b/drivers/net/wireless/intel/iwlwifi/mld/mlo.c
index f842f5183223..7a37ca64a612 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/mlo.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/mlo.c
@@ -164,7 +164,10 @@ static void iwl_mld_check_emlsr_prevention(struct iwl_mld *mld,
* The timeouts are chosen so that this will not happen, i.e.
* IWL_MLD_EMLSR_PREVENT_LONG > IWL_MLD_PREVENT_EMLSR_TIMEOUT
*/
- WARN_ON(mld_vif->emlsr.exit_repeat_count > 3);
+ if (WARN_ON_ONCE(mld_vif->emlsr.exit_repeat_count > 3)) {
+ IWL_ERR(mld, "check-emlsr-prevention exit repeats: %d > 3, blocked-reasons: 0x%x\n",
+ mld_vif->emlsr.exit_repeat_count, mld_vif->emlsr.blocked_reasons);
+ }
}
IWL_DEBUG_EHT(mld,
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 28/28] wifi: mac80211: Decrease WARN spam.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Comment one of them out, and make another WARN_ONCE.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
net/mac80211/link.c | 1 -
net/mac80211/util.c | 3 ++-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/mac80211/link.c b/net/mac80211/link.c
index 6125e79f67c9..e3a825ea3a04 100644
--- a/net/mac80211/link.c
+++ b/net/mac80211/link.c
@@ -544,7 +544,6 @@ static int _ieee80211_set_active_links(struct ieee80211_sub_if_data *sdata,
ret = drv_change_sta_links(local, sdata, &sta->sta,
old_active | active_links,
active_links);
- WARN_ON_ONCE(ret);
/*
* Do it again, just in case - the driver might very
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ec11ee6b8752..df156f8b5211 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1879,7 +1879,8 @@ int ieee80211_reconfig(struct ieee80211_local *local)
if (suspended)
WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
else
- WARN(1, "Hardware became unavailable during restart.\n");
+ WARN_ONCE(1, "Hardware became unavailable during restart: %d\n", res);
+
ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_SUSPEND,
false);
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 20/28] wifi: iwlwifi: mld: Improve logging message.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
Indicate that the problem is being fixed.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/mac80211.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
index d44ec81d2ce4..aa4d391ffc00 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/mac80211.c
@@ -647,7 +647,7 @@ void iwl_mld_mac80211_stop(struct ieee80211_hw *hw, bool suspend)
*/
for (int i = 0; i < ARRAY_SIZE(mld->scan.uid_status); i++)
if (WARN_ONCE(mld->scan.uid_status[i],
- "UMAC scan UID %d status was not cleaned (0x%x 0x%x)\n",
+ "mac80211-stop: UMAC scan UID %d status was not cleaned (0x%x 0x%x), forcing to 0\n",
i, mld->scan.uid_status[i], mld->scan.status))
mld->scan.uid_status[i] = 0;
}
--
2.42.0
^ permalink raw reply related
* [PATCH wireless-next 13/28] wifi: iwlwifi: mld: Remove warning about BAID.
From: greearb @ 2026-03-11 23:07 UTC (permalink / raw)
To: linux-wireless; +Cc: Ben Greear
In-Reply-To: <20260311230730.163348-1-greearb@candelatech.com>
From: Ben Greear <greearb@candelatech.com>
It seems to be expected behaviour, and is seen fairly often
in testing in adverse conditions, so make it a one-line log
message instead of WARN splat.
Signed-off-by: Ben Greear <greearb@candelatech.com>
---
drivers/net/wireless/intel/iwlwifi/mld/agg.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/agg.c b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
index a757077b0a7a..23d55374ef8a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/agg.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
@@ -216,10 +216,16 @@ iwl_mld_reorder(struct iwl_mld *mld, struct napi_struct *napi,
if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
return IWL_MLD_PASS_SKB;
- /* no sta yet */
- if (WARN_ONCE(!sta,
- "Got valid BAID without a valid station assigned\n"))
+ /* no sta yet. This happens fairly often, don't WARN_ON about it. */
+ if (!sta) {
+ static bool done_once;
+
+ if (!done_once) {
+ IWL_ERR(mld, "Got valid BAID without a valid station assigned, will not log again.\n");
+ done_once = true;
+ }
return IWL_MLD_PASS_SKB;
+ }
mld_sta = iwl_mld_sta_from_mac80211(sta);
--
2.42.0
^ permalink raw reply related
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