v2:
1. rebased to latest ath.git master ath-202111170737
2. add "ath11k: add configure country code for QCA6390 and WCN6855", it is needed for
patch "ath11k: add 11d scan offload support"
Wen Gong (2):
ath11k: add configure country code for QCA6390 and WCN6855
ath11k: add 11d scan offload support
drivers/net/wireless/ath/ath11k/core.c | 30 +++++
drivers/net/wireless/ath/ath11k/core.h | 9 ++
drivers/net/wireless/ath/ath11k/mac.c | 162 ++++++++++++++++++++++++-
drivers/net/wireless/ath/ath11k/mac.h | 7 ++
drivers/net/wireless/ath/ath11k/pci.c | 1 +
drivers/net/wireless/ath/ath11k/reg.c | 15 +++
drivers/net/wireless/ath/ath11k/wmi.c | 145 ++++++++++++++++++++++
drivers/net/wireless/ath/ath11k/wmi.h | 39 ++++++
8 files changed, 407 insertions(+), 1 deletion(-)
base-commit: 63ec871bc50a306aac550e2d85f697ca2d5f5deb
--
2.31.1
Add handler to send WMI_SET_CURRENT_COUNTRY_CMDID to firmware which
is used for QCA6390 and WCN6855.
Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Signed-off-by: Wen Gong <[email protected]>
---
drivers/net/wireless/ath/ath11k/wmi.c | 36 +++++++++++++++++++++++++++
drivers/net/wireless/ath/ath11k/wmi.h | 12 +++++++++
2 files changed, 48 insertions(+)
diff --git a/drivers/net/wireless/ath/ath11k/wmi.c b/drivers/net/wireless/ath/ath11k/wmi.c
index 614b2f6bcc8e..e5f3d04645d4 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -2793,6 +2793,42 @@ ath11k_wmi_send_init_country_cmd(struct ath11k *ar,
return ret;
}
+int ath11k_wmi_send_set_current_country_cmd(struct ath11k *ar,
+ struct wmi_set_current_country_params *param)
+{
+ struct ath11k_pdev_wmi *wmi = ar->wmi;
+ struct wmi_set_current_country_cmd *cmd;
+ struct sk_buff *skb;
+ int ret;
+
+ skb = ath11k_wmi_alloc_skb(wmi->wmi_ab, sizeof(*cmd));
+ if (!skb)
+ return -ENOMEM;
+
+ cmd = (struct wmi_set_current_country_cmd *)skb->data;
+ cmd->tlv_header =
+ FIELD_PREP(WMI_TLV_TAG, WMI_TAG_SET_CURRENT_COUNTRY_CMD) |
+ FIELD_PREP(WMI_TLV_LEN, sizeof(*cmd) - TLV_HDR_SIZE);
+
+ cmd->pdev_id = ar->pdev->pdev_id;
+ memcpy(&cmd->new_alpha2, ¶m->alpha2, 3);
+ ret = ath11k_wmi_cmd_send(wmi, skb, WMI_SET_CURRENT_COUNTRY_CMDID);
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
+ "set current country pdev id %d alpha2 %c%c\n",
+ ar->pdev->pdev_id,
+ param->alpha2[0],
+ param->alpha2[1]);
+
+ if (ret) {
+ ath11k_warn(ar->ab,
+ "failed to send WMI_SET_CURRENT_COUNTRY_CMDID: %d\n", ret);
+ dev_kfree_skb(skb);
+ }
+
+ return ret;
+}
+
int
ath11k_wmi_send_thermal_mitigation_param_cmd(struct ath11k *ar,
struct thermal_mitigation_params *param)
diff --git a/drivers/net/wireless/ath/ath11k/wmi.h b/drivers/net/wireless/ath/ath11k/wmi.h
index 4eb06cb7f883..e1686a2ab520 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.h
+++ b/drivers/net/wireless/ath/ath11k/wmi.h
@@ -3770,6 +3770,16 @@ struct stats_request_params {
u32 pdev_id;
};
+struct wmi_set_current_country_params {
+ u8 alpha2[3];
+};
+
+struct wmi_set_current_country_cmd {
+ u32 tlv_header;
+ u32 pdev_id;
+ u32 new_alpha2;
+} __packed;
+
enum set_init_cc_type {
WMI_COUNTRY_INFO_TYPE_ALPHA,
WMI_COUNTRY_INFO_TYPE_COUNTRY_CODE,
@@ -5433,6 +5443,8 @@ int ath11k_wmi_delba_send(struct ath11k *ar, u32 vdev_id, const u8 *mac,
u32 tid, u32 initiator, u32 reason);
int ath11k_wmi_send_bcn_offload_control_cmd(struct ath11k *ar,
u32 vdev_id, u32 bcn_ctrl_op);
+int ath11k_wmi_send_set_current_country_cmd(struct ath11k *ar,
+ struct wmi_set_current_country_params *param);
int
ath11k_wmi_send_init_country_cmd(struct ath11k *ar,
struct wmi_init_country_params init_cc_param);
--
2.31.1
Add handler for WMI_11D_NEW_COUNTRY_EVENTID, WMI_11D_SCAN_START_CMDID,
WMI_11D_SCAN_STOP_CMDID.
After vdev create for STATION, send WMI_11D_SCAN_START_CMDID to firmware
and wait firmware complete it, the scan from mac80211 also need to wait
the 11d scan finished, and send WMI_11D_SCAN_STOP_CMDID to firmware
before vdev delete for STATION.
Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01230-QCAHSTSWPLZ_V2_TO_X86-1
Signed-off-by: Wen Gong <[email protected]>
---
drivers/net/wireless/ath/ath11k/core.c | 30 +++++
drivers/net/wireless/ath/ath11k/core.h | 9 ++
drivers/net/wireless/ath/ath11k/mac.c | 162 ++++++++++++++++++++++++-
drivers/net/wireless/ath/ath11k/mac.h | 7 ++
drivers/net/wireless/ath/ath11k/pci.c | 1 +
drivers/net/wireless/ath/ath11k/reg.c | 15 +++
drivers/net/wireless/ath/ath11k/wmi.c | 109 +++++++++++++++++
drivers/net/wireless/ath/ath11k/wmi.h | 27 +++++
8 files changed, 359 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index a40bbca3e9af..ad0c20cbf976 100644
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -1045,6 +1045,34 @@ void ath11k_core_halt(struct ath11k *ar)
idr_init(&ar->txmgmt_idr);
}
+static void ath11k_update_11d(struct work_struct *work)
+{
+ struct ath11k_base *ab = container_of(work, struct ath11k_base, update_11d_work);
+ struct ath11k *ar;
+ struct ath11k_pdev *pdev;
+ struct wmi_set_current_country_params set_current_param = {};
+ int ret, i;
+
+ spin_lock_bh(&ab->base_lock);
+ memcpy(&set_current_param.alpha2, &ab->new_alpha2, 2);
+ spin_unlock_bh(&ab->base_lock);
+
+ ath11k_dbg(ab, ATH11K_DBG_WMI, "update 11d new cc %c%c\n",
+ set_current_param.alpha2[0],
+ set_current_param.alpha2[1]);
+
+ for (i = 0; i < ab->num_radios; i++) {
+ pdev = &ab->pdevs[i];
+ ar = pdev->ar;
+
+ ret = ath11k_wmi_send_set_current_country_cmd(ar, &set_current_param);
+ if (ret)
+ ath11k_warn(ar->ab,
+ "pdev id %d failed set current country code: %d\n",
+ i, ret);
+ }
+}
+
static void ath11k_core_restart(struct work_struct *work)
{
struct ath11k_base *ab = container_of(work, struct ath11k_base, restart_work);
@@ -1214,12 +1242,14 @@ struct ath11k_base *ath11k_core_alloc(struct device *dev, size_t priv_size,
mutex_init(&ab->core_lock);
spin_lock_init(&ab->base_lock);
+ mutex_init(&ab->vdev_id_11d_lock);
INIT_LIST_HEAD(&ab->peers);
init_waitqueue_head(&ab->peer_mapping_wq);
init_waitqueue_head(&ab->wmi_ab.tx_credits_wq);
init_waitqueue_head(&ab->qmi.cold_boot_waitq);
INIT_WORK(&ab->restart_work, ath11k_core_restart);
+ INIT_WORK(&ab->update_11d_work, ath11k_update_11d);
timer_setup(&ab->rx_replenish_retry, ath11k_ce_rx_replenish_retry, 0);
init_completion(&ab->htc_suspend);
init_completion(&ab->wow.wakeup_completed);
diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index bbfc10fd5c6d..98986b604806 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -585,6 +585,11 @@ struct ath11k {
#endif
bool dfs_block_radar_events;
struct ath11k_thermal thermal;
+ u32 vdev_id_11d_scan;
+ struct completion finish_11d_scan;
+ struct completion finish_11d_ch_list;
+ bool pending_11d;
+ bool regdom_set_by_user;
};
struct ath11k_band_cap {
@@ -754,6 +759,8 @@ struct ath11k_base {
struct completion driver_recovery;
struct workqueue_struct *workqueue;
struct work_struct restart_work;
+ struct work_struct update_11d_work;
+ u8 new_alpha2[3];
struct {
/* protected by data_lock */
u32 fw_crash_counter;
@@ -763,6 +770,8 @@ struct ath11k_base {
struct ath11k_dbring_cap *db_caps;
u32 num_db_cap;
+ /* To synchronize 11d scan vdev id */
+ struct mutex vdev_id_11d_lock;
struct timer_list mon_reap_timer;
struct completion htc_suspend;
diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index 292b2b7eab11..047783f787b5 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -2584,6 +2584,8 @@ static void ath11k_bss_assoc(struct ieee80211_hw *hw,
if (ret)
ath11k_warn(ar->ab, "failed to set vdev %i OBSS PD parameters: %d\n",
arvif->vdev_id, ret);
+
+ ath11k_mac_11d_scan_stop_all(ar->ab);
}
static void ath11k_bss_disassoc(struct ieee80211_hw *hw,
@@ -3313,6 +3315,7 @@ static int ath11k_start_scan(struct ath11k *ar,
struct scan_req_params *arg)
{
int ret;
+ unsigned long timeout = 1 * HZ;
lockdep_assert_held(&ar->conf_mutex);
@@ -3323,7 +3326,14 @@ static int ath11k_start_scan(struct ath11k *ar,
if (ret)
return ret;
- ret = wait_for_completion_timeout(&ar->scan.started, 1 * HZ);
+ if (test_bit(WMI_TLV_SERVICE_11D_OFFLOAD, ar->ab->wmi_ab.svc_map)) {
+ timeout = 5 * HZ;
+
+ if (ar->supports_6ghz)
+ timeout += 5 * HZ;
+ }
+
+ ret = wait_for_completion_timeout(&ar->scan.started, timeout);
if (ret == 0) {
ret = ath11k_scan_stop(ar);
if (ret)
@@ -3380,6 +3390,26 @@ static int ath11k_mac_op_hw_scan(struct ieee80211_hw *hw,
if (ret)
goto exit;
+ /* Currently the pending_11d=true only happened 1 time while
+ * wlan interface up in ath11k_mac_11d_scan_start(), it is called by
+ * ath11k_mac_op_add_interface(), after wlan interface up,
+ * pending_11d=false always.
+ * If remove below wait, it always happened scan fail and lead connect
+ * fail while wlan interface up, because it has a 11d scan which is running
+ * in firmware, and lead this scan failed.
+ */
+ if (ar->pending_11d) {
+ long time_left;
+ unsigned long timeout = 5 * HZ;
+
+ if (ar->supports_6ghz)
+ timeout += 5 * HZ;
+
+ time_left = wait_for_completion_timeout(&ar->finish_11d_ch_list, timeout);
+ ath11k_dbg(ar->ab, ATH11K_DBG_MAC,
+ "mac wait 11d channel list time left %ld\n", time_left);
+ }
+
memset(&arg, 0, sizeof(arg));
ath11k_wmi_start_scan_init(ar, &arg);
arg.vdev_id = arvif->vdev_id;
@@ -5677,6 +5707,122 @@ static void ath11k_mac_op_update_vif_offload(struct ieee80211_hw *hw,
}
}
+static bool ath11k_mac_vif_ap_active_any(struct ath11k_base *ab)
+{
+ struct ath11k *ar;
+ struct ath11k_pdev *pdev;
+ struct ath11k_vif *arvif;
+ int i;
+
+ for (i = 0; i < ab->num_radios; i++) {
+ pdev = &ab->pdevs[i];
+ ar = pdev->ar;
+ list_for_each_entry(arvif, &ar->arvifs, list) {
+ if (arvif->is_up && arvif->vdev_type == WMI_VDEV_TYPE_AP)
+ return true;
+ }
+ }
+ return false;
+}
+
+void ath11k_mac_11d_scan_start(struct ath11k *ar, u32 vdev_id, bool wait)
+{
+ struct wmi_11d_scan_start_params param;
+ int ret;
+
+ mutex_lock(&ar->ab->vdev_id_11d_lock);
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac vdev id for 11d scan %d\n",
+ ar->vdev_id_11d_scan);
+
+ if (ar->regdom_set_by_user)
+ goto fin;
+
+ if (ar->vdev_id_11d_scan != ATH11K_11D_INVALID_VDEV_ID)
+ goto fin;
+
+ if (!test_bit(WMI_TLV_SERVICE_11D_OFFLOAD, ar->ab->wmi_ab.svc_map))
+ goto fin;
+
+ if (ath11k_mac_vif_ap_active_any(ar->ab))
+ goto fin;
+
+ param.vdev_id = vdev_id;
+ param.start_interval_msec = 0;
+ param.scan_period_msec = ATH11K_SCAN_11D_INTERVAL;
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac start 11d scan\n");
+
+ if (wait)
+ reinit_completion(&ar->finish_11d_scan);
+
+ ret = ath11k_wmi_send_11d_scan_start_cmd(ar, ¶m);
+ if (ret) {
+ ath11k_warn(ar->ab, "failed to start 11d scan vdev %d ret: %d\n",
+ vdev_id, ret);
+ } else {
+ ar->vdev_id_11d_scan = vdev_id;
+ if (wait) {
+ ar->pending_11d = true;
+ ret = wait_for_completion_timeout(&ar->finish_11d_scan,
+ 5 * HZ);
+ ath11k_dbg(ar->ab, ATH11K_DBG_MAC,
+ "mac 11d scan left time %d\n", ret);
+
+ if (!ret)
+ ar->pending_11d = false;
+ }
+ }
+
+fin:
+ mutex_unlock(&ar->ab->vdev_id_11d_lock);
+}
+
+void ath11k_mac_11d_scan_stop(struct ath11k *ar)
+{
+ int ret;
+ u32 vdev_id;
+
+ if (!test_bit(WMI_TLV_SERVICE_11D_OFFLOAD, ar->ab->wmi_ab.svc_map))
+ return;
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac stop 11d scan\n");
+
+ mutex_lock(&ar->ab->vdev_id_11d_lock);
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac stop 11d vdev id %d\n",
+ ar->vdev_id_11d_scan);
+
+ if (ar->vdev_id_11d_scan != ATH11K_11D_INVALID_VDEV_ID) {
+ vdev_id = ar->vdev_id_11d_scan;
+
+ ret = ath11k_wmi_send_11d_scan_stop_cmd(ar, vdev_id);
+ if (ret)
+ ath11k_warn(ar->ab,
+ "failed to stopt 11d scan vdev %d ret: %d\n",
+ vdev_id, ret);
+ else
+ ar->vdev_id_11d_scan = ATH11K_11D_INVALID_VDEV_ID;
+ }
+ mutex_unlock(&ar->ab->vdev_id_11d_lock);
+}
+
+void ath11k_mac_11d_scan_stop_all(struct ath11k_base *ab)
+{
+ struct ath11k *ar;
+ struct ath11k_pdev *pdev;
+ int i;
+
+ ath11k_dbg(ab, ATH11K_DBG_MAC, "mac stop soc 11d scan\n");
+
+ for (i = 0; i < ab->num_radios; i++) {
+ pdev = &ab->pdevs[i];
+ ar = pdev->ar;
+
+ ath11k_mac_11d_scan_stop(ar);
+ }
+}
+
static int ath11k_mac_op_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
@@ -5810,6 +5956,8 @@ static int ath11k_mac_op_add_interface(struct ieee80211_hw *hw,
arvif->vdev_id, ret);
goto err_peer_del;
}
+
+ ath11k_mac_11d_scan_stop_all(ar->ab);
break;
case WMI_VDEV_TYPE_STA:
param_id = WMI_STA_PS_PARAM_RX_WAKE_POLICY;
@@ -5849,6 +5997,9 @@ static int ath11k_mac_op_add_interface(struct ieee80211_hw *hw,
arvif->vdev_id, ret);
goto err_peer_del;
}
+
+ ath11k_mac_11d_scan_start(ar, arvif->vdev_id, true);
+
break;
case WMI_VDEV_TYPE_MONITOR:
set_bit(ATH11K_FLAG_MONITOR_VDEV_CREATED, &ar->monitor_flags);
@@ -5950,6 +6101,9 @@ static void ath11k_mac_op_remove_interface(struct ieee80211_hw *hw,
ath11k_dbg(ab, ATH11K_DBG_MAC, "mac remove interface (vdev %d)\n",
arvif->vdev_id);
+ if (arvif->vdev_type == WMI_VDEV_TYPE_STA)
+ ath11k_mac_11d_scan_stop(ar);
+
if (arvif->vdev_type == WMI_VDEV_TYPE_AP) {
ret = ath11k_peer_delete(ar, arvif->vdev_id, vif->addr);
if (ret)
@@ -6698,6 +6852,9 @@ ath11k_mac_op_unassign_vif_chanctx(struct ieee80211_hw *hw,
ret);
}
+ if (arvif->vdev_type == WMI_VDEV_TYPE_STA)
+ ath11k_mac_11d_scan_start(ar, arvif->vdev_id, false);
+
mutex_unlock(&ar->conf_mutex);
}
@@ -8099,6 +8256,9 @@ int ath11k_mac_allocate(struct ath11k_base *ab)
ar->monitor_vdev_id = -1;
clear_bit(ATH11K_FLAG_MONITOR_VDEV_CREATED, &ar->monitor_flags);
+ ar->vdev_id_11d_scan = ATH11K_11D_INVALID_VDEV_ID;
+ init_completion(&ar->finish_11d_scan);
+ init_completion(&ar->finish_11d_ch_list);
}
return 0;
diff --git a/drivers/net/wireless/ath/ath11k/mac.h b/drivers/net/wireless/ath/ath11k/mac.h
index f6f37e8c8c6a..dfa112c10834 100644
--- a/drivers/net/wireless/ath/ath11k/mac.h
+++ b/drivers/net/wireless/ath/ath11k/mac.h
@@ -127,6 +127,13 @@ struct ath11k_generic_iter {
extern const struct htt_rx_ring_tlv_filter ath11k_mac_mon_status_filter_default;
+#define ATH11K_SCAN_11D_INTERVAL 600000
+#define ATH11K_11D_INVALID_VDEV_ID 0xFFFF
+
+void ath11k_mac_11d_scan_start(struct ath11k *ar, u32 vdev_id, bool wait);
+void ath11k_mac_11d_scan_stop(struct ath11k *ar);
+void ath11k_mac_11d_scan_stop_all(struct ath11k_base *ab);
+
void ath11k_mac_destroy(struct ath11k_base *ab);
void ath11k_mac_unregister(struct ath11k_base *ab);
int ath11k_mac_register(struct ath11k_base *ab);
diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 958c2b2c5b3e..3cc666a002b9 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -1383,6 +1383,7 @@ static void ath11k_pci_remove(struct pci_dev *pdev)
set_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags);
+ cancel_work_sync(&ab->update_11d_work);
ath11k_core_deinit(ab);
qmi_fail:
diff --git a/drivers/net/wireless/ath/ath11k/reg.c b/drivers/net/wireless/ath/ath11k/reg.c
index 8606170ba80d..1f8a81987187 100644
--- a/drivers/net/wireless/ath/ath11k/reg.c
+++ b/drivers/net/wireless/ath/ath11k/reg.c
@@ -86,6 +86,9 @@ ath11k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
if (ret)
ath11k_warn(ar->ab,
"INIT Country code set to fw failed : %d\n", ret);
+
+ ath11k_mac_11d_scan_stop(ar);
+ ar->regdom_set_by_user = true;
}
int ath11k_reg_update_chan_list(struct ath11k *ar)
@@ -179,6 +182,11 @@ int ath11k_reg_update_chan_list(struct ath11k *ar)
ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
kfree(params);
+ if (ar->pending_11d) {
+ complete(&ar->finish_11d_ch_list);
+ ar->pending_11d = false;
+ }
+
return ret;
}
@@ -244,8 +252,15 @@ int ath11k_regd_update(struct ath11k *ar)
goto err;
}
+ if (ar->pending_11d)
+ complete(&ar->finish_11d_scan);
+
rtnl_lock();
wiphy_lock(ar->hw->wiphy);
+
+ if (ar->pending_11d)
+ reinit_completion(&ar->finish_11d_ch_list);
+
ret = regulatory_set_wiphy_regd_sync(ar->hw->wiphy, regd_copy);
wiphy_unlock(ar->hw->wiphy);
rtnl_unlock();
diff --git a/drivers/net/wireless/ath/ath11k/wmi.c b/drivers/net/wireless/ath/ath11k/wmi.c
index e5f3d04645d4..652d80eeedf4 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -130,6 +130,8 @@ static const struct wmi_tlv_policy wmi_tlv_policies[] = {
.min_len = sizeof(struct wmi_vdev_delete_resp_event) },
[WMI_TAG_OBSS_COLOR_COLLISION_EVT] = {
.min_len = sizeof(struct wmi_obss_color_collision_event) },
+ [WMI_TAG_11D_NEW_COUNTRY_EVENT] = {
+ .min_len = sizeof(struct wmi_11d_new_cc_ev) },
};
#define PRIMAP(_hw_mode_) \
@@ -2893,6 +2895,75 @@ ath11k_wmi_send_thermal_mitigation_param_cmd(struct ath11k *ar,
return ret;
}
+int ath11k_wmi_send_11d_scan_start_cmd(struct ath11k *ar,
+ struct wmi_11d_scan_start_params *param)
+{
+ struct ath11k_pdev_wmi *wmi = ar->wmi;
+ struct wmi_11d_scan_start_cmd *cmd;
+ struct sk_buff *skb;
+ int ret;
+
+ skb = ath11k_wmi_alloc_skb(wmi->wmi_ab, sizeof(*cmd));
+ if (!skb)
+ return -ENOMEM;
+
+ cmd = (struct wmi_11d_scan_start_cmd *)skb->data;
+ cmd->tlv_header =
+ FIELD_PREP(WMI_TLV_TAG, WMI_TAG_11D_SCAN_START_CMD) |
+ FIELD_PREP(WMI_TLV_LEN, sizeof(*cmd) - TLV_HDR_SIZE);
+
+ cmd->vdev_id = param->vdev_id;
+ cmd->scan_period_msec = param->scan_period_msec;
+ cmd->start_interval_msec = param->start_interval_msec;
+ ret = ath11k_wmi_cmd_send(wmi, skb, WMI_11D_SCAN_START_CMDID);
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
+ "send 11d scan start vdev id %d period %d ms internal %d ms\n",
+ cmd->vdev_id,
+ cmd->scan_period_msec,
+ cmd->start_interval_msec);
+
+ if (ret) {
+ ath11k_warn(ar->ab,
+ "failed to send WMI_11D_SCAN_START_CMDID: %d\n", ret);
+ dev_kfree_skb(skb);
+ }
+
+ return ret;
+}
+
+int ath11k_wmi_send_11d_scan_stop_cmd(struct ath11k *ar, u32 vdev_id)
+{
+ struct ath11k_pdev_wmi *wmi = ar->wmi;
+ struct wmi_11d_scan_stop_cmd *cmd;
+ struct sk_buff *skb;
+ int ret;
+
+ skb = ath11k_wmi_alloc_skb(wmi->wmi_ab, sizeof(*cmd));
+ if (!skb)
+ return -ENOMEM;
+
+ cmd = (struct wmi_11d_scan_stop_cmd *)skb->data;
+ cmd->tlv_header =
+ FIELD_PREP(WMI_TLV_TAG, WMI_TAG_11D_SCAN_STOP_CMD) |
+ FIELD_PREP(WMI_TLV_LEN, sizeof(*cmd) - TLV_HDR_SIZE);
+
+ cmd->vdev_id = vdev_id;
+ ret = ath11k_wmi_cmd_send(wmi, skb, WMI_11D_SCAN_STOP_CMDID);
+
+ ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
+ "send 11d scan stop vdev id %d\n",
+ cmd->vdev_id);
+
+ if (ret) {
+ ath11k_warn(ar->ab,
+ "failed to send WMI_11D_SCAN_STOP_CMDID: %d\n", ret);
+ dev_kfree_skb(skb);
+ }
+
+ return ret;
+}
+
int ath11k_wmi_pdev_pktlog_enable(struct ath11k *ar, u32 pktlog_filter)
{
struct ath11k_pdev_wmi *wmi = ar->wmi;
@@ -5932,6 +6003,41 @@ static void ath11k_wmi_op_ep_tx_credits(struct ath11k_base *ab)
wake_up(&ab->wmi_ab.tx_credits_wq);
}
+static int ath11k_reg_11d_new_cc_event(struct ath11k_base *ab, struct sk_buff *skb)
+{
+ const struct wmi_11d_new_cc_ev *ev;
+ const void **tb;
+ int ret;
+
+ tb = ath11k_wmi_tlv_parse_alloc(ab, skb->data, skb->len, GFP_ATOMIC);
+ if (IS_ERR(tb)) {
+ ret = PTR_ERR(tb);
+ ath11k_warn(ab, "failed to parse tlv: %d\n", ret);
+ return ret;
+ }
+
+ ev = tb[WMI_TAG_11D_NEW_COUNTRY_EVENT];
+ if (!ev) {
+ kfree(tb);
+ ath11k_warn(ab, "failed to fetch 11d new cc ev");
+ return -EPROTO;
+ }
+
+ spin_lock_bh(&ab->base_lock);
+ memcpy(&ab->new_alpha2, &ev->new_alpha2, 2);
+ spin_unlock_bh(&ab->base_lock);
+
+ ath11k_dbg(ab, ATH11K_DBG_WMI, "wmi 11d new cc %c%c\n",
+ ab->new_alpha2[0],
+ ab->new_alpha2[1]);
+
+ kfree(tb);
+
+ queue_work(ab->workqueue, &ab->update_11d_work);
+
+ return 0;
+}
+
static void ath11k_wmi_htc_tx_complete(struct ath11k_base *ab,
struct sk_buff *skb)
{
@@ -7321,6 +7427,9 @@ static void ath11k_wmi_tlv_op_rx(struct ath11k_base *ab, struct sk_buff *skb)
case WMI_WOW_WAKEUP_HOST_EVENTID:
ath11k_wmi_event_wow_wakeup_host(ab, skb);
break;
+ case WMI_11D_NEW_COUNTRY_EVENTID:
+ ath11k_reg_11d_new_cc_event(ab, skb);
+ break;
/* TODO: Add remaining events */
default:
ath11k_dbg(ab, ATH11K_DBG_WMI, "Unknown eventid: 0x%x\n", id);
diff --git a/drivers/net/wireless/ath/ath11k/wmi.h b/drivers/net/wireless/ath/ath11k/wmi.h
index e1686a2ab520..3b7ad14f0901 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.h
+++ b/drivers/net/wireless/ath/ath11k/wmi.h
@@ -3813,6 +3813,28 @@ struct wmi_init_country_cmd {
} cc_info;
} __packed;
+struct wmi_11d_scan_start_params {
+ u32 vdev_id;
+ u32 scan_period_msec;
+ u32 start_interval_msec;
+};
+
+struct wmi_11d_scan_start_cmd {
+ u32 tlv_header;
+ u32 vdev_id;
+ u32 scan_period_msec;
+ u32 start_interval_msec;
+} __packed;
+
+struct wmi_11d_scan_stop_cmd {
+ u32 tlv_header;
+ u32 vdev_id;
+} __packed;
+
+struct wmi_11d_new_cc_ev {
+ u32 new_alpha2;
+} __packed;
+
#define THERMAL_LEVELS 1
struct tt_level_config {
u32 tmplwm;
@@ -5448,6 +5470,11 @@ int ath11k_wmi_send_set_current_country_cmd(struct ath11k *ar,
int
ath11k_wmi_send_init_country_cmd(struct ath11k *ar,
struct wmi_init_country_params init_cc_param);
+
+int ath11k_wmi_send_11d_scan_start_cmd(struct ath11k *ar,
+ struct wmi_11d_scan_start_params *param);
+int ath11k_wmi_send_11d_scan_stop_cmd(struct ath11k *ar, u32 vdev_id);
+
int
ath11k_wmi_send_thermal_mitigation_param_cmd(struct ath11k *ar,
struct thermal_mitigation_params *param);
--
2.31.1
Wen Gong <[email protected]> writes:
> v2:
> 1. rebased to latest ath.git master ath-202111170737
> 2. add "ath11k: add configure country code for QCA6390 and WCN6855", it is needed for
> patch "ath11k: add 11d scan offload support"
>
> Wen Gong (2):
> ath11k: add configure country code for QCA6390 and WCN6855
> ath11k: add 11d scan offload support
>
> drivers/net/wireless/ath/ath11k/core.c | 30 +++++
> drivers/net/wireless/ath/ath11k/core.h | 9 ++
> drivers/net/wireless/ath/ath11k/mac.c | 162 ++++++++++++++++++++++++-
> drivers/net/wireless/ath/ath11k/mac.h | 7 ++
> drivers/net/wireless/ath/ath11k/pci.c | 1 +
> drivers/net/wireless/ath/ath11k/reg.c | 15 +++
> drivers/net/wireless/ath/ath11k/wmi.c | 145 ++++++++++++++++++++++
> drivers/net/wireless/ath/ath11k/wmi.h | 39 ++++++
> 8 files changed, 407 insertions(+), 1 deletion(-)
I suspect this patch adds a new lockdep warning on my NUC testbox.
Tag: ath-202111221111
[ 87.034989] ath11k_pci 0000:06:00.0: MSI vectors: 32
[ 87.035059] ath11k_pci 0000:06:00.0: qca6390 hw2.0
[ 87.684032] ath11k_pci 0000:06:00.0: chip_id 0x0 chip_family 0xb board_id 0xff soc_id 0xffffffff
[ 87.684277] ath11k_pci 0000:06:00.0: fw_version 0x101c06cc fw_build_timestamp 2020-06-24 19:50 fw_build
[...]
[ 527.024672] ======================================================
[ 527.024708] WARNING: possible circular locking dependency detected
[ 527.024746] 5.16.0-rc1-wt-ath+ #528 Not tainted
[ 527.024785] ------------------------------------------------------
[ 527.024819] wpa_supplicant/2309 is trying to acquire lock:
[ 527.024857] ffff88811fe6f148 ((wq_completion)phy0){+.+.}-{0:0}, at: flush_workqueue+0xd9/0x1340
[ 527.024901]
but task is already holding lock:
[ 527.024934] ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_stop+0xa0/0x680 [mac80211]
[ 527.025023]
which lock already depends on the new lock.
[ 527.025058]
the existing dependency chain (in reverse order) is:
[ 527.025091]
-> #3 (&rdev->wiphy.mtx){+.+.}-{3:3}:
[ 527.025129] __lock_acquire+0xb72/0x1870
[ 527.025166] lock_acquire.part.0+0x117/0x340
[ 527.025219] __mutex_lock+0x15a/0x1610
[ 527.025267] reg_process_self_managed_hints+0x5e/0x130 [cfg80211]
[ 527.025343] wiphy_register+0x1607/0x2640 [cfg80211]
[ 527.025409] ieee80211_register_hw+0x17d5/0x3150 [mac80211]
[ 527.025481] __ath11k_mac_register+0x1944/0x25c0 [ath11k]
[ 527.025530] ath11k_mac_register+0x2ee/0x610 [ath11k]
[ 527.025578] ath11k_core_qmi_firmware_ready.part.0+0x9e/0x2b0 [ath11k]
[ 527.025626] ath11k_qmi_driver_event_work+0x49c/0xa80 [ath11k]
[ 527.025674] process_one_work+0x866/0x1490
[ 527.026142] worker_thread+0x596/0x1010
[ 527.026180] kthread+0x35d/0x420
[ 527.026247] ret_from_fork+0x22/0x30
[ 527.026282]
-> #2 (rtnl_mutex){+.+.}-{3:3}:
[ 527.026319] __lock_acquire+0xb72/0x1870
[ 527.026355] lock_acquire.part.0+0x117/0x340
[ 527.026388] __mutex_lock+0x15a/0x1610
[ 527.026423] ath11k_regd_update+0x1ce/0x580 [ath11k]
[ 527.026471] process_one_work+0x866/0x1490
[ 527.026505] worker_thread+0x596/0x1010
[ 527.026540] kthread+0x35d/0x420
[ 527.026574] ret_from_fork+0x22/0x30
[ 527.026608]
-> #1 ((work_completion)(&ar->regd_update_work)){+.+.}-{0:0}:
[ 527.026645] __lock_acquire+0xb72/0x1870
[ 527.026679] lock_acquire.part.0+0x117/0x340
[ 527.026714] process_one_work+0x7f6/0x1490
[ 527.026748] worker_thread+0x596/0x1010
[ 527.026782] kthread+0x35d/0x420
[ 527.026814] ret_from_fork+0x22/0x30
[ 527.026848]
-> #0 ((wq_completion)phy0){+.+.}-{0:0}:
[ 527.026883] check_prev_add+0x15e/0x20f0
[ 527.026917] validate_chain+0xf7f/0x1b30
[ 527.026957] __lock_acquire+0xb72/0x1870
[ 527.026992] lock_acquire.part.0+0x117/0x340
[ 527.027026] flush_workqueue+0xfc/0x1340
[ 527.027061] ieee80211_stop_device+0x50/0x60 [mac80211]
[ 527.027142] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
[ 527.027248] ieee80211_stop+0xad/0x680 [mac80211]
[ 527.027322] __dev_close_many+0x18f/0x2a0
[ 527.027357] __dev_change_flags+0x264/0x680
[ 527.027391] dev_change_flags+0x86/0x150
[ 527.027425] devinet_ioctl+0xfbb/0x18f0
[ 527.027460] inet_ioctl+0x2ae/0x2f0
[ 527.027493] sock_do_ioctl+0xd5/0x1d0
[ 527.027527] sock_ioctl+0x1c1/0x570
[ 527.027561] __x64_sys_ioctl+0x122/0x190
[ 527.027598] do_syscall_64+0x3b/0x90
[ 527.027631] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 527.027666]
other info that might help us debug this:
[ 527.027700] Chain exists of:
(wq_completion)phy0 --> rtnl_mutex --> &rdev->wiphy.mtx
[ 527.027739] Possible unsafe locking scenario:
[ 527.027772] CPU0 CPU1
[ 527.027808] ---- ----
[ 527.027841] lock(&rdev->wiphy.mtx);
[ 527.027880] lock(rtnl_mutex);
[ 527.027916] lock(&rdev->wiphy.mtx);
[ 527.027950] lock((wq_completion)phy0);
[ 527.027984]
*** DEADLOCK ***
[ 527.028017] 2 locks held by wpa_supplicant/2309:
[ 527.028051] #0: ffffffff8ff3cb70 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x182/0x18f0
[ 527.029006] #1: ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_stop+0xa0/0x680 [mac80211]
[ 527.029087]
stack backtrace:
[ 527.029121] CPU: 6 PID: 2309 Comm: wpa_supplicant Kdump: loaded Not tainted 5.16.0-rc1-wt-ath+ #528
[ 527.029158] Hardware name: Intel(R) Client Systems NUC8i7HVK/NUC8i7HVB, BIOS HNKBLi70.86A.0067.2021.0528.1339 05/28/2021
[ 527.029211] Call Trace:
[ 527.029246] <TASK>
[ 527.029292] dump_stack_lvl+0x57/0x7d
[ 527.029328] check_noncircular+0x26a/0x310
[ 527.029363] ? print_circular_bug+0x450/0x450
[ 527.029403] ? __kernel_text_address+0x9/0x30
[ 527.029439] ? alloc_chain_hlocks+0x1de/0x530
[ 527.029474] check_prev_add+0x15e/0x20f0
[ 527.029511] ? __lock_acquire+0xb72/0x1870
[ 527.029547] validate_chain+0xf7f/0x1b30
[ 527.029583] ? check_prev_add+0x20f0/0x20f0
[ 527.029618] ? __lock_release+0x4bd/0x9f0
[ 527.029655] __lock_acquire+0xb72/0x1870
[ 527.029691] lock_acquire.part.0+0x117/0x340
[ 527.029727] ? flush_workqueue+0xd9/0x1340
[ 527.029763] ? rcu_read_unlock+0x40/0x40
[ 527.029799] ? rcu_read_lock_sched_held+0x3a/0x70
[ 527.029833] ? lock_acquire+0x1a8/0x210
[ 527.029868] ? flush_workqueue+0xd9/0x1340
[ 527.029903] flush_workqueue+0xfc/0x1340
[ 527.029936] ? flush_workqueue+0xd9/0x1340
[ 527.029970] ? mark_held_locks+0xa5/0xe0
[ 527.030009] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
[ 527.030044] ? check_flush_dependency+0x350/0x350
[ 527.030082] ? ath11k_mac_op_remove_interface+0x58b/0xa20 [ath11k]
[ 527.030131] ? ieee80211_stop_device+0x50/0x60 [mac80211]
[ 527.030241] ieee80211_stop_device+0x50/0x60 [mac80211]
[ 527.030321] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
[ 527.030397] ? mutex_lock_io_nested+0x1470/0x1470
[ 527.030436] ? lock_downgrade+0x130/0x130
[ 527.030473] ? ieee80211_adjust_monitor_flags+0x1f0/0x1f0 [mac80211]
[ 527.030547] ? mark_held_locks+0xa5/0xe0
[ 527.030583] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
[ 527.030618] ? __local_bh_enable_ip+0xa0/0x110
[ 527.030654] ieee80211_stop+0xad/0x680 [mac80211]
[ 527.030728] __dev_close_many+0x18f/0x2a0
[ 527.030764] ? unregister_netdevice_notifier+0x150/0x150
[ 527.030799] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
[ 527.030834] ? __local_bh_enable_ip+0xa0/0x110
[ 527.030869] __dev_change_flags+0x264/0x680
[ 527.030903] ? dev_set_allmulti+0x10/0x10
[ 527.030940] dev_change_flags+0x86/0x150
[ 527.030976] devinet_ioctl+0xfbb/0x18f0
[ 527.031011] inet_ioctl+0x2ae/0x2f0
[ 527.031048] ? inet_dgram_connect+0x220/0x220
[ 527.031087] ? lock_downgrade+0x130/0x130
[ 527.032054] ? __might_fault+0xb3/0x160
[ 527.032090] ? __might_fault+0xb3/0x160
[ 527.032124] ? _copy_to_user+0x94/0xb0
[ 527.032160] sock_do_ioctl+0xd5/0x1d0
[ 527.032216] ? put_user_ifreq+0x70/0x70
[ 527.032279] ? vfs_fileattr_set+0x930/0x930
[ 527.032314] ? selinux_file_ioctl+0x375/0x520
[ 527.032350] sock_ioctl+0x1c1/0x570
[ 527.032385] ? br_ioctl_call+0x90/0x90
[ 527.032420] ? __ia32_sys_sendmmsg+0xeb/0xf0
[ 527.032454] ? __sys_recvmsg_sock+0x10/0x10
[ 527.032492] __x64_sys_ioctl+0x122/0x190
[ 527.032527] do_syscall_64+0x3b/0x90
[ 527.032562] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 527.032597] RIP: 0033:0x7fd37113850b
[ 527.032636] Code: 0f 1e fa 48 8b 05 85 39 0d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 55 39 0d 00 f7 d8 64 89 01 48
[ 527.032679] RSP: 002b:00007ffd0174b258 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 527.032718] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd37113850b
[ 527.032755] RDX: 00007ffd0174b260 RSI: 0000000000008914 RDI: 0000000000000008
[ 527.032790] RBP: 0000000000000008 R08: 0000000000000007 R09: 00007fd37120cb80
[ 527.032824] R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
[ 527.032857] R13: 00005641e16bfa70 R14: 00007ffd0174b260 R15: 00005641e16b4840
[ 527.032894] </TASK>
--
https://patchwork.kernel.org/project/linux-wireless/list/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
I am afraid you hit the issue same with below patch, they looks similar,
but I am not sure it is same root cause.
https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]/
[RFC] ath11k: fix blocked for more than 120 seconds caused by reg update
On 11/22/2021 8:28 PM, Kalle Valo wrote:
> Wen Gong <[email protected]> writes:
>
>> v2:
>> 1. rebased to latest ath.git master ath-202111170737
>> 2. add "ath11k: add configure country code for QCA6390 and WCN6855", it is needed for
>> patch "ath11k: add 11d scan offload support"
>>
>> Wen Gong (2):
>> ath11k: add configure country code for QCA6390 and WCN6855
>> ath11k: add 11d scan offload support
>>
>> drivers/net/wireless/ath/ath11k/core.c | 30 +++++
>> drivers/net/wireless/ath/ath11k/core.h | 9 ++
>> drivers/net/wireless/ath/ath11k/mac.c | 162 ++++++++++++++++++++++++-
>> drivers/net/wireless/ath/ath11k/mac.h | 7 ++
>> drivers/net/wireless/ath/ath11k/pci.c | 1 +
>> drivers/net/wireless/ath/ath11k/reg.c | 15 +++
>> drivers/net/wireless/ath/ath11k/wmi.c | 145 ++++++++++++++++++++++
>> drivers/net/wireless/ath/ath11k/wmi.h | 39 ++++++
>> 8 files changed, 407 insertions(+), 1 deletion(-)
> I suspect this patch adds a new lockdep warning on my NUC testbox.
>
> Tag: ath-202111221111
>
> [ 87.034989] ath11k_pci 0000:06:00.0: MSI vectors: 32
> [ 87.035059] ath11k_pci 0000:06:00.0: qca6390 hw2.0
> [ 87.684032] ath11k_pci 0000:06:00.0: chip_id 0x0 chip_family 0xb board_id 0xff soc_id 0xffffffff
> [ 87.684277] ath11k_pci 0000:06:00.0: fw_version 0x101c06cc fw_build_timestamp 2020-06-24 19:50 fw_build
>
> [...]
>
> [ 527.024672] ======================================================
> [ 527.024708] WARNING: possible circular locking dependency detected
> [ 527.024746] 5.16.0-rc1-wt-ath+ #528 Not tainted
> [ 527.024785] ------------------------------------------------------
> [ 527.024819] wpa_supplicant/2309 is trying to acquire lock:
> [ 527.024857] ffff88811fe6f148 ((wq_completion)phy0){+.+.}-{0:0}, at: flush_workqueue+0xd9/0x1340
> [ 527.024901]
> but task is already holding lock:
> [ 527.024934] ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_stop+0xa0/0x680 [mac80211]
> [ 527.025023]
> which lock already depends on the new lock.
>
> [ 527.025058]
> the existing dependency chain (in reverse order) is:
> [ 527.025091]
> -> #3 (&rdev->wiphy.mtx){+.+.}-{3:3}:
> [ 527.025129] __lock_acquire+0xb72/0x1870
> [ 527.025166] lock_acquire.part.0+0x117/0x340
> [ 527.025219] __mutex_lock+0x15a/0x1610
> [ 527.025267] reg_process_self_managed_hints+0x5e/0x130 [cfg80211]
> [ 527.025343] wiphy_register+0x1607/0x2640 [cfg80211]
> [ 527.025409] ieee80211_register_hw+0x17d5/0x3150 [mac80211]
> [ 527.025481] __ath11k_mac_register+0x1944/0x25c0 [ath11k]
> [ 527.025530] ath11k_mac_register+0x2ee/0x610 [ath11k]
> [ 527.025578] ath11k_core_qmi_firmware_ready.part.0+0x9e/0x2b0 [ath11k]
> [ 527.025626] ath11k_qmi_driver_event_work+0x49c/0xa80 [ath11k]
> [ 527.025674] process_one_work+0x866/0x1490
> [ 527.026142] worker_thread+0x596/0x1010
> [ 527.026180] kthread+0x35d/0x420
> [ 527.026247] ret_from_fork+0x22/0x30
> [ 527.026282]
> -> #2 (rtnl_mutex){+.+.}-{3:3}:
> [ 527.026319] __lock_acquire+0xb72/0x1870
> [ 527.026355] lock_acquire.part.0+0x117/0x340
> [ 527.026388] __mutex_lock+0x15a/0x1610
> [ 527.026423] ath11k_regd_update+0x1ce/0x580 [ath11k]
> [ 527.026471] process_one_work+0x866/0x1490
> [ 527.026505] worker_thread+0x596/0x1010
> [ 527.026540] kthread+0x35d/0x420
> [ 527.026574] ret_from_fork+0x22/0x30
> [ 527.026608]
> -> #1 ((work_completion)(&ar->regd_update_work)){+.+.}-{0:0}:
> [ 527.026645] __lock_acquire+0xb72/0x1870
> [ 527.026679] lock_acquire.part.0+0x117/0x340
> [ 527.026714] process_one_work+0x7f6/0x1490
> [ 527.026748] worker_thread+0x596/0x1010
> [ 527.026782] kthread+0x35d/0x420
> [ 527.026814] ret_from_fork+0x22/0x30
> [ 527.026848]
> -> #0 ((wq_completion)phy0){+.+.}-{0:0}:
> [ 527.026883] check_prev_add+0x15e/0x20f0
> [ 527.026917] validate_chain+0xf7f/0x1b30
> [ 527.026957] __lock_acquire+0xb72/0x1870
> [ 527.026992] lock_acquire.part.0+0x117/0x340
> [ 527.027026] flush_workqueue+0xfc/0x1340
> [ 527.027061] ieee80211_stop_device+0x50/0x60 [mac80211]
> [ 527.027142] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
> [ 527.027248] ieee80211_stop+0xad/0x680 [mac80211]
> [ 527.027322] __dev_close_many+0x18f/0x2a0
> [ 527.027357] __dev_change_flags+0x264/0x680
> [ 527.027391] dev_change_flags+0x86/0x150
> [ 527.027425] devinet_ioctl+0xfbb/0x18f0
> [ 527.027460] inet_ioctl+0x2ae/0x2f0
> [ 527.027493] sock_do_ioctl+0xd5/0x1d0
> [ 527.027527] sock_ioctl+0x1c1/0x570
> [ 527.027561] __x64_sys_ioctl+0x122/0x190
> [ 527.027598] do_syscall_64+0x3b/0x90
> [ 527.027631] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 527.027666]
> other info that might help us debug this:
>
> [ 527.027700] Chain exists of:
> (wq_completion)phy0 --> rtnl_mutex --> &rdev->wiphy.mtx
>
> [ 527.027739] Possible unsafe locking scenario:
>
> [ 527.027772] CPU0 CPU1
> [ 527.027808] ---- ----
> [ 527.027841] lock(&rdev->wiphy.mtx);
> [ 527.027880] lock(rtnl_mutex);
> [ 527.027916] lock(&rdev->wiphy.mtx);
> [ 527.027950] lock((wq_completion)phy0);
> [ 527.027984]
> *** DEADLOCK ***
>
> [ 527.028017] 2 locks held by wpa_supplicant/2309:
> [ 527.028051] #0: ffffffff8ff3cb70 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x182/0x18f0
> [ 527.029006] #1: ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_stop+0xa0/0x680 [mac80211]
> [ 527.029087]
> stack backtrace:
> [ 527.029121] CPU: 6 PID: 2309 Comm: wpa_supplicant Kdump: loaded Not tainted 5.16.0-rc1-wt-ath+ #528
> [ 527.029158] Hardware name: Intel(R) Client Systems NUC8i7HVK/NUC8i7HVB, BIOS HNKBLi70.86A.0067.2021.0528.1339 05/28/2021
> [ 527.029211] Call Trace:
> [ 527.029246] <TASK>
> [ 527.029292] dump_stack_lvl+0x57/0x7d
> [ 527.029328] check_noncircular+0x26a/0x310
> [ 527.029363] ? print_circular_bug+0x450/0x450
> [ 527.029403] ? __kernel_text_address+0x9/0x30
> [ 527.029439] ? alloc_chain_hlocks+0x1de/0x530
> [ 527.029474] check_prev_add+0x15e/0x20f0
> [ 527.029511] ? __lock_acquire+0xb72/0x1870
> [ 527.029547] validate_chain+0xf7f/0x1b30
> [ 527.029583] ? check_prev_add+0x20f0/0x20f0
> [ 527.029618] ? __lock_release+0x4bd/0x9f0
> [ 527.029655] __lock_acquire+0xb72/0x1870
> [ 527.029691] lock_acquire.part.0+0x117/0x340
> [ 527.029727] ? flush_workqueue+0xd9/0x1340
> [ 527.029763] ? rcu_read_unlock+0x40/0x40
> [ 527.029799] ? rcu_read_lock_sched_held+0x3a/0x70
> [ 527.029833] ? lock_acquire+0x1a8/0x210
> [ 527.029868] ? flush_workqueue+0xd9/0x1340
> [ 527.029903] flush_workqueue+0xfc/0x1340
> [ 527.029936] ? flush_workqueue+0xd9/0x1340
> [ 527.029970] ? mark_held_locks+0xa5/0xe0
> [ 527.030009] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
> [ 527.030044] ? check_flush_dependency+0x350/0x350
> [ 527.030082] ? ath11k_mac_op_remove_interface+0x58b/0xa20 [ath11k]
> [ 527.030131] ? ieee80211_stop_device+0x50/0x60 [mac80211]
> [ 527.030241] ieee80211_stop_device+0x50/0x60 [mac80211]
> [ 527.030321] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
> [ 527.030397] ? mutex_lock_io_nested+0x1470/0x1470
> [ 527.030436] ? lock_downgrade+0x130/0x130
> [ 527.030473] ? ieee80211_adjust_monitor_flags+0x1f0/0x1f0 [mac80211]
> [ 527.030547] ? mark_held_locks+0xa5/0xe0
> [ 527.030583] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
> [ 527.030618] ? __local_bh_enable_ip+0xa0/0x110
> [ 527.030654] ieee80211_stop+0xad/0x680 [mac80211]
> [ 527.030728] __dev_close_many+0x18f/0x2a0
> [ 527.030764] ? unregister_netdevice_notifier+0x150/0x150
> [ 527.030799] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
> [ 527.030834] ? __local_bh_enable_ip+0xa0/0x110
> [ 527.030869] __dev_change_flags+0x264/0x680
> [ 527.030903] ? dev_set_allmulti+0x10/0x10
> [ 527.030940] dev_change_flags+0x86/0x150
> [ 527.030976] devinet_ioctl+0xfbb/0x18f0
> [ 527.031011] inet_ioctl+0x2ae/0x2f0
> [ 527.031048] ? inet_dgram_connect+0x220/0x220
> [ 527.031087] ? lock_downgrade+0x130/0x130
> [ 527.032054] ? __might_fault+0xb3/0x160
> [ 527.032090] ? __might_fault+0xb3/0x160
> [ 527.032124] ? _copy_to_user+0x94/0xb0
> [ 527.032160] sock_do_ioctl+0xd5/0x1d0
> [ 527.032216] ? put_user_ifreq+0x70/0x70
> [ 527.032279] ? vfs_fileattr_set+0x930/0x930
> [ 527.032314] ? selinux_file_ioctl+0x375/0x520
> [ 527.032350] sock_ioctl+0x1c1/0x570
> [ 527.032385] ? br_ioctl_call+0x90/0x90
> [ 527.032420] ? __ia32_sys_sendmmsg+0xeb/0xf0
> [ 527.032454] ? __sys_recvmsg_sock+0x10/0x10
> [ 527.032492] __x64_sys_ioctl+0x122/0x190
> [ 527.032527] do_syscall_64+0x3b/0x90
> [ 527.032562] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 527.032597] RIP: 0033:0x7fd37113850b
> [ 527.032636] Code: 0f 1e fa 48 8b 05 85 39 0d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 55 39 0d 00 f7 d8 64 89 01 48
> [ 527.032679] RSP: 002b:00007ffd0174b258 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> [ 527.032718] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd37113850b
> [ 527.032755] RDX: 00007ffd0174b260 RSI: 0000000000008914 RDI: 0000000000000008
> [ 527.032790] RBP: 0000000000000008 R08: 0000000000000007 R09: 00007fd37120cb80
> [ 527.032824] R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
> [ 527.032857] R13: 00005641e16bfa70 R14: 00007ffd0174b260 R15: 00005641e16b4840
> [ 527.032894] </TASK>
>
Hi Kalle,
I am afraid you hit same issue of below patch, they looks similar, but I
am not sure they are the same root cause.
https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]/
[RFC] ath11k: fix blocked for more than 120 seconds caused by reg update
On 11/22/2021 8:28 PM, Kalle Valo wrote:
> Wen Gong <[email protected]> writes:
>
>> v2:
>> 1. rebased to latest ath.git master ath-202111170737
>> 2. add "ath11k: add configure country code for QCA6390 and WCN6855", it is needed for
>> patch "ath11k: add 11d scan offload support"
>>
>> Wen Gong (2):
>> ath11k: add configure country code for QCA6390 and WCN6855
>> ath11k: add 11d scan offload support
>>
>> drivers/net/wireless/ath/ath11k/core.c | 30 +++++
>> drivers/net/wireless/ath/ath11k/core.h | 9 ++
>> drivers/net/wireless/ath/ath11k/mac.c | 162 ++++++++++++++++++++++++-
>> drivers/net/wireless/ath/ath11k/mac.h | 7 ++
>> drivers/net/wireless/ath/ath11k/pci.c | 1 +
>> drivers/net/wireless/ath/ath11k/reg.c | 15 +++
>> drivers/net/wireless/ath/ath11k/wmi.c | 145 ++++++++++++++++++++++
>> drivers/net/wireless/ath/ath11k/wmi.h | 39 ++++++
>> 8 files changed, 407 insertions(+), 1 deletion(-)
> I suspect this patch adds a new lockdep warning on my NUC testbox.
>
> Tag: ath-202111221111
>
> [ 87.034989] ath11k_pci 0000:06:00.0: MSI vectors: 32
> [ 87.035059] ath11k_pci 0000:06:00.0: qca6390 hw2.0
> [ 87.684032] ath11k_pci 0000:06:00.0: chip_id 0x0 chip_family 0xb board_id 0xff soc_id 0xffffffff
> [ 87.684277] ath11k_pci 0000:06:00.0: fw_version 0x101c06cc fw_build_timestamp 2020-06-24 19:50 fw_build
>
> [...]
>
> [ 527.024672] ======================================================
> [ 527.024708] WARNING: possible circular locking dependency detected
> [ 527.024746] 5.16.0-rc1-wt-ath+ #528 Not tainted
> [ 527.024785] ------------------------------------------------------
> [ 527.024819] wpa_supplicant/2309 is trying to acquire lock:
> [ 527.024857] ffff88811fe6f148 ((wq_completion)phy0){+.+.}-{0:0}, at: flush_workqueue+0xd9/0x1340
> [ 527.024901]
> but task is already holding lock:
> [ 527.024934] ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_stop+0xa0/0x680 [mac80211]
> [ 527.025023]
> which lock already depends on the new lock.
>
> [ 527.025058]
> the existing dependency chain (in reverse order) is:
> [ 527.025091]
> -> #3 (&rdev->wiphy.mtx){+.+.}-{3:3}:
> [ 527.025129] __lock_acquire+0xb72/0x1870
> [ 527.025166] lock_acquire.part.0+0x117/0x340
> [ 527.025219] __mutex_lock+0x15a/0x1610
> [ 527.025267] reg_process_self_managed_hints+0x5e/0x130 [cfg80211]
> [ 527.025343] wiphy_register+0x1607/0x2640 [cfg80211]
> [ 527.025409] ieee80211_register_hw+0x17d5/0x3150 [mac80211]
> [ 527.025481] __ath11k_mac_register+0x1944/0x25c0 [ath11k]
> [ 527.025530] ath11k_mac_register+0x2ee/0x610 [ath11k]
> [ 527.025578] ath11k_core_qmi_firmware_ready.part.0+0x9e/0x2b0 [ath11k]
> [ 527.025626] ath11k_qmi_driver_event_work+0x49c/0xa80 [ath11k]
> [ 527.025674] process_one_work+0x866/0x1490
> [ 527.026142] worker_thread+0x596/0x1010
> [ 527.026180] kthread+0x35d/0x420
> [ 527.026247] ret_from_fork+0x22/0x30
> [ 527.026282]
> -> #2 (rtnl_mutex){+.+.}-{3:3}:
> [ 527.026319] __lock_acquire+0xb72/0x1870
> [ 527.026355] lock_acquire.part.0+0x117/0x340
> [ 527.026388] __mutex_lock+0x15a/0x1610
> [ 527.026423] ath11k_regd_update+0x1ce/0x580 [ath11k]
> [ 527.026471] process_one_work+0x866/0x1490
> [ 527.026505] worker_thread+0x596/0x1010
> [ 527.026540] kthread+0x35d/0x420
> [ 527.026574] ret_from_fork+0x22/0x30
> [ 527.026608]
> -> #1 ((work_completion)(&ar->regd_update_work)){+.+.}-{0:0}:
> [ 527.026645] __lock_acquire+0xb72/0x1870
> [ 527.026679] lock_acquire.part.0+0x117/0x340
> [ 527.026714] process_one_work+0x7f6/0x1490
> [ 527.026748] worker_thread+0x596/0x1010
> [ 527.026782] kthread+0x35d/0x420
> [ 527.026814] ret_from_fork+0x22/0x30
> [ 527.026848]
> -> #0 ((wq_completion)phy0){+.+.}-{0:0}:
> [ 527.026883] check_prev_add+0x15e/0x20f0
> [ 527.026917] validate_chain+0xf7f/0x1b30
> [ 527.026957] __lock_acquire+0xb72/0x1870
> [ 527.026992] lock_acquire.part.0+0x117/0x340
> [ 527.027026] flush_workqueue+0xfc/0x1340
> [ 527.027061] ieee80211_stop_device+0x50/0x60 [mac80211]
> [ 527.027142] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
> [ 527.027248] ieee80211_stop+0xad/0x680 [mac80211]
> [ 527.027322] __dev_close_many+0x18f/0x2a0
> [ 527.027357] __dev_change_flags+0x264/0x680
> [ 527.027391] dev_change_flags+0x86/0x150
> [ 527.027425] devinet_ioctl+0xfbb/0x18f0
> [ 527.027460] inet_ioctl+0x2ae/0x2f0
> [ 527.027493] sock_do_ioctl+0xd5/0x1d0
> [ 527.027527] sock_ioctl+0x1c1/0x570
> [ 527.027561] __x64_sys_ioctl+0x122/0x190
> [ 527.027598] do_syscall_64+0x3b/0x90
> [ 527.027631] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 527.027666]
> other info that might help us debug this:
>
> [ 527.027700] Chain exists of:
> (wq_completion)phy0 --> rtnl_mutex --> &rdev->wiphy.mtx
>
> [ 527.027739] Possible unsafe locking scenario:
>
> [ 527.027772] CPU0 CPU1
> [ 527.027808] ---- ----
> [ 527.027841] lock(&rdev->wiphy.mtx);
> [ 527.027880] lock(rtnl_mutex);
> [ 527.027916] lock(&rdev->wiphy.mtx);
> [ 527.027950] lock((wq_completion)phy0);
> [ 527.027984]
> *** DEADLOCK ***
>
> [ 527.028017] 2 locks held by wpa_supplicant/2309:
> [ 527.028051] #0: ffffffff8ff3cb70 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x182/0x18f0
> [ 527.029006] #1: ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: ieee80211_stop+0xa0/0x680 [mac80211]
> [ 527.029087]
> stack backtrace:
> [ 527.029121] CPU: 6 PID: 2309 Comm: wpa_supplicant Kdump: loaded Not tainted 5.16.0-rc1-wt-ath+ #528
> [ 527.029158] Hardware name: Intel(R) Client Systems NUC8i7HVK/NUC8i7HVB, BIOS HNKBLi70.86A.0067.2021.0528.1339 05/28/2021
> [ 527.029211] Call Trace:
> [ 527.029246] <TASK>
> [ 527.029292] dump_stack_lvl+0x57/0x7d
> [ 527.029328] check_noncircular+0x26a/0x310
> [ 527.029363] ? print_circular_bug+0x450/0x450
> [ 527.029403] ? __kernel_text_address+0x9/0x30
> [ 527.029439] ? alloc_chain_hlocks+0x1de/0x530
> [ 527.029474] check_prev_add+0x15e/0x20f0
> [ 527.029511] ? __lock_acquire+0xb72/0x1870
> [ 527.029547] validate_chain+0xf7f/0x1b30
> [ 527.029583] ? check_prev_add+0x20f0/0x20f0
> [ 527.029618] ? __lock_release+0x4bd/0x9f0
> [ 527.029655] __lock_acquire+0xb72/0x1870
> [ 527.029691] lock_acquire.part.0+0x117/0x340
> [ 527.029727] ? flush_workqueue+0xd9/0x1340
> [ 527.029763] ? rcu_read_unlock+0x40/0x40
> [ 527.029799] ? rcu_read_lock_sched_held+0x3a/0x70
> [ 527.029833] ? lock_acquire+0x1a8/0x210
> [ 527.029868] ? flush_workqueue+0xd9/0x1340
> [ 527.029903] flush_workqueue+0xfc/0x1340
> [ 527.029936] ? flush_workqueue+0xd9/0x1340
> [ 527.029970] ? mark_held_locks+0xa5/0xe0
> [ 527.030009] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
> [ 527.030044] ? check_flush_dependency+0x350/0x350
> [ 527.030082] ? ath11k_mac_op_remove_interface+0x58b/0xa20 [ath11k]
> [ 527.030131] ? ieee80211_stop_device+0x50/0x60 [mac80211]
> [ 527.030241] ieee80211_stop_device+0x50/0x60 [mac80211]
> [ 527.030321] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
> [ 527.030397] ? mutex_lock_io_nested+0x1470/0x1470
> [ 527.030436] ? lock_downgrade+0x130/0x130
> [ 527.030473] ? ieee80211_adjust_monitor_flags+0x1f0/0x1f0 [mac80211]
> [ 527.030547] ? mark_held_locks+0xa5/0xe0
> [ 527.030583] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
> [ 527.030618] ? __local_bh_enable_ip+0xa0/0x110
> [ 527.030654] ieee80211_stop+0xad/0x680 [mac80211]
> [ 527.030728] __dev_close_many+0x18f/0x2a0
> [ 527.030764] ? unregister_netdevice_notifier+0x150/0x150
> [ 527.030799] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
> [ 527.030834] ? __local_bh_enable_ip+0xa0/0x110
> [ 527.030869] __dev_change_flags+0x264/0x680
> [ 527.030903] ? dev_set_allmulti+0x10/0x10
> [ 527.030940] dev_change_flags+0x86/0x150
> [ 527.030976] devinet_ioctl+0xfbb/0x18f0
> [ 527.031011] inet_ioctl+0x2ae/0x2f0
> [ 527.031048] ? inet_dgram_connect+0x220/0x220
> [ 527.031087] ? lock_downgrade+0x130/0x130
> [ 527.032054] ? __might_fault+0xb3/0x160
> [ 527.032090] ? __might_fault+0xb3/0x160
> [ 527.032124] ? _copy_to_user+0x94/0xb0
> [ 527.032160] sock_do_ioctl+0xd5/0x1d0
> [ 527.032216] ? put_user_ifreq+0x70/0x70
> [ 527.032279] ? vfs_fileattr_set+0x930/0x930
> [ 527.032314] ? selinux_file_ioctl+0x375/0x520
> [ 527.032350] sock_ioctl+0x1c1/0x570
> [ 527.032385] ? br_ioctl_call+0x90/0x90
> [ 527.032420] ? __ia32_sys_sendmmsg+0xeb/0xf0
> [ 527.032454] ? __sys_recvmsg_sock+0x10/0x10
> [ 527.032492] __x64_sys_ioctl+0x122/0x190
> [ 527.032527] do_syscall_64+0x3b/0x90
> [ 527.032562] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 527.032597] RIP: 0033:0x7fd37113850b
> [ 527.032636] Code: 0f 1e fa 48 8b 05 85 39 0d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 55 39 0d 00 f7 d8 64 89 01 48
> [ 527.032679] RSP: 002b:00007ffd0174b258 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> [ 527.032718] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd37113850b
> [ 527.032755] RDX: 00007ffd0174b260 RSI: 0000000000008914 RDI: 0000000000000008
> [ 527.032790] RBP: 0000000000000008 R08: 0000000000000007 R09: 00007fd37120cb80
> [ 527.032824] R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
> [ 527.032857] R13: 00005641e16bfa70 R14: 00007ffd0174b260 R15: 00005641e16b4840
> [ 527.032894] </TASK>
>
Hi Kalle,
I read the 2 patches of "11d scan offload" again, not found it will
introduce this new lockdep directly.
Could you tell what the steps/operation in your test?
I can try to reproduce it after enable the lockdep config.
On 11/25/2021 7:01 PM, Wen Gong wrote:
> Hi Kalle,
>
> I am afraid you hit same issue of below patch, they looks similar, but
> I am not sure they are the same root cause.
>
> https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]/
>
>
> [RFC] ath11k: fix blocked for more than 120 seconds caused by reg update
>
> On 11/22/2021 8:28 PM, Kalle Valo wrote:
>> Wen Gong <[email protected]> writes:
>>
>>> v2:
>>> 1. rebased to latest ath.git master ath-202111170737
>>> 2. add "ath11k: add configure country code for QCA6390 and
>>> WCN6855", it is needed for
>>> patch "ath11k: add 11d scan offload support"
>>>
>>> Wen Gong (2):
>>> ath11k: add configure country code for QCA6390 and WCN6855
>>> ath11k: add 11d scan offload support
>>>
>>> drivers/net/wireless/ath/ath11k/core.c | 30 +++++
>>> drivers/net/wireless/ath/ath11k/core.h | 9 ++
>>> drivers/net/wireless/ath/ath11k/mac.c | 162
>>> ++++++++++++++++++++++++-
>>> drivers/net/wireless/ath/ath11k/mac.h | 7 ++
>>> drivers/net/wireless/ath/ath11k/pci.c | 1 +
>>> drivers/net/wireless/ath/ath11k/reg.c | 15 +++
>>> drivers/net/wireless/ath/ath11k/wmi.c | 145 ++++++++++++++++++++++
>>> drivers/net/wireless/ath/ath11k/wmi.h | 39 ++++++
>>> 8 files changed, 407 insertions(+), 1 deletion(-)
>> I suspect this patch adds a new lockdep warning on my NUC testbox.
>>
>> Tag: ath-202111221111
>>
>> [ 87.034989] ath11k_pci 0000:06:00.0: MSI vectors: 32
>> [ 87.035059] ath11k_pci 0000:06:00.0: qca6390 hw2.0
>> [ 87.684032] ath11k_pci 0000:06:00.0: chip_id 0x0 chip_family 0xb
>> board_id 0xff soc_id 0xffffffff
>> [ 87.684277] ath11k_pci 0000:06:00.0: fw_version 0x101c06cc
>> fw_build_timestamp 2020-06-24 19:50 fw_build
>>
>> [...]
>>
>> [ 527.024672] ======================================================
>> [ 527.024708] WARNING: possible circular locking dependency detected
>> [ 527.024746] 5.16.0-rc1-wt-ath+ #528 Not tainted
>> [ 527.024785] ------------------------------------------------------
>> [ 527.024819] wpa_supplicant/2309 is trying to acquire lock:
>> [ 527.024857] ffff88811fe6f148 ((wq_completion)phy0){+.+.}-{0:0},
>> at: flush_workqueue+0xd9/0x1340
>> [ 527.024901]
>> but task is already holding lock:
>> [ 527.024934] ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3}, at:
>> ieee80211_stop+0xa0/0x680 [mac80211]
>> [ 527.025023]
>> which lock already depends on the new lock.
>>
>> [ 527.025058]
>> the existing dependency chain (in reverse order) is:
>> [ 527.025091]
>> -> #3 (&rdev->wiphy.mtx){+.+.}-{3:3}:
>> [ 527.025129] __lock_acquire+0xb72/0x1870
>> [ 527.025166] lock_acquire.part.0+0x117/0x340
>> [ 527.025219] __mutex_lock+0x15a/0x1610
>> [ 527.025267] reg_process_self_managed_hints+0x5e/0x130
>> [cfg80211]
>> [ 527.025343] wiphy_register+0x1607/0x2640 [cfg80211]
>> [ 527.025409] ieee80211_register_hw+0x17d5/0x3150 [mac80211]
>> [ 527.025481] __ath11k_mac_register+0x1944/0x25c0 [ath11k]
>> [ 527.025530] ath11k_mac_register+0x2ee/0x610 [ath11k]
>> [ 527.025578] ath11k_core_qmi_firmware_ready.part.0+0x9e/0x2b0 [ath11k]
>> [ 527.025626] ath11k_qmi_driver_event_work+0x49c/0xa80 [ath11k]
>> [ 527.025674] process_one_work+0x866/0x1490
>> [ 527.026142] worker_thread+0x596/0x1010
>> [ 527.026180] kthread+0x35d/0x420
>> [ 527.026247] ret_from_fork+0x22/0x30
>> [ 527.026282]
>> -> #2 (rtnl_mutex){+.+.}-{3:3}:
>> [ 527.026319] __lock_acquire+0xb72/0x1870
>> [ 527.026355] lock_acquire.part.0+0x117/0x340
>> [ 527.026388] __mutex_lock+0x15a/0x1610
>> [ 527.026423] ath11k_regd_update+0x1ce/0x580 [ath11k]
>> [ 527.026471] process_one_work+0x866/0x1490
>> [ 527.026505] worker_thread+0x596/0x1010
>> [ 527.026540] kthread+0x35d/0x420
>> [ 527.026574] ret_from_fork+0x22/0x30
>> [ 527.026608]
>> -> #1
>> ((work_completion)(&ar->regd_update_work)){+.+.}-{0:0}:
>> [ 527.026645] __lock_acquire+0xb72/0x1870
>> [ 527.026679] lock_acquire.part.0+0x117/0x340
>> [ 527.026714] process_one_work+0x7f6/0x1490
>> [ 527.026748] worker_thread+0x596/0x1010
>> [ 527.026782] kthread+0x35d/0x420
>> [ 527.026814] ret_from_fork+0x22/0x30
>> [ 527.026848]
>> -> #0 ((wq_completion)phy0){+.+.}-{0:0}:
>> [ 527.026883] check_prev_add+0x15e/0x20f0
>> [ 527.026917] validate_chain+0xf7f/0x1b30
>> [ 527.026957] __lock_acquire+0xb72/0x1870
>> [ 527.026992] lock_acquire.part.0+0x117/0x340
>> [ 527.027026] flush_workqueue+0xfc/0x1340
>> [ 527.027061] ieee80211_stop_device+0x50/0x60 [mac80211]
>> [ 527.027142] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
>> [ 527.027248] ieee80211_stop+0xad/0x680 [mac80211]
>> [ 527.027322] __dev_close_many+0x18f/0x2a0
>> [ 527.027357] __dev_change_flags+0x264/0x680
>> [ 527.027391] dev_change_flags+0x86/0x150
>> [ 527.027425] devinet_ioctl+0xfbb/0x18f0
>> [ 527.027460] inet_ioctl+0x2ae/0x2f0
>> [ 527.027493] sock_do_ioctl+0xd5/0x1d0
>> [ 527.027527] sock_ioctl+0x1c1/0x570
>> [ 527.027561] __x64_sys_ioctl+0x122/0x190
>> [ 527.027598] do_syscall_64+0x3b/0x90
>> [ 527.027631] entry_SYSCALL_64_after_hwframe+0x44/0xae
>> [ 527.027666]
>> other info that might help us debug this:
>>
>> [ 527.027700] Chain exists of:
>> (wq_completion)phy0 --> rtnl_mutex -->
>> &rdev->wiphy.mtx
>>
>> [ 527.027739] Possible unsafe locking scenario:
>>
>> [ 527.027772] CPU0 CPU1
>> [ 527.027808] ---- ----
>> [ 527.027841] lock(&rdev->wiphy.mtx);
>> [ 527.027880] lock(rtnl_mutex);
>> [ 527.027916] lock(&rdev->wiphy.mtx);
>> [ 527.027950] lock((wq_completion)phy0);
>> [ 527.027984]
>> *** DEADLOCK ***
>>
>> [ 527.028017] 2 locks held by wpa_supplicant/2309:
>> [ 527.028051] #0: ffffffff8ff3cb70 (rtnl_mutex){+.+.}-{3:3}, at:
>> devinet_ioctl+0x182/0x18f0
>> [ 527.029006] #1: ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3},
>> at: ieee80211_stop+0xa0/0x680 [mac80211]
>> [ 527.029087]
>> stack backtrace:
>> [ 527.029121] CPU: 6 PID: 2309 Comm: wpa_supplicant Kdump: loaded
>> Not tainted 5.16.0-rc1-wt-ath+ #528
>> [ 527.029158] Hardware name: Intel(R) Client Systems
>> NUC8i7HVK/NUC8i7HVB, BIOS HNKBLi70.86A.0067.2021.0528.1339 05/28/2021
>> [ 527.029211] Call Trace:
>> [ 527.029246] <TASK>
>> [ 527.029292] dump_stack_lvl+0x57/0x7d
>> [ 527.029328] check_noncircular+0x26a/0x310
>> [ 527.029363] ? print_circular_bug+0x450/0x450
>> [ 527.029403] ? __kernel_text_address+0x9/0x30
>> [ 527.029439] ? alloc_chain_hlocks+0x1de/0x530
>> [ 527.029474] check_prev_add+0x15e/0x20f0
>> [ 527.029511] ? __lock_acquire+0xb72/0x1870
>> [ 527.029547] validate_chain+0xf7f/0x1b30
>> [ 527.029583] ? check_prev_add+0x20f0/0x20f0
>> [ 527.029618] ? __lock_release+0x4bd/0x9f0
>> [ 527.029655] __lock_acquire+0xb72/0x1870
>> [ 527.029691] lock_acquire.part.0+0x117/0x340
>> [ 527.029727] ? flush_workqueue+0xd9/0x1340
>> [ 527.029763] ? rcu_read_unlock+0x40/0x40
>> [ 527.029799] ? rcu_read_lock_sched_held+0x3a/0x70
>> [ 527.029833] ? lock_acquire+0x1a8/0x210
>> [ 527.029868] ? flush_workqueue+0xd9/0x1340
>> [ 527.029903] flush_workqueue+0xfc/0x1340
>> [ 527.029936] ? flush_workqueue+0xd9/0x1340
>> [ 527.029970] ? mark_held_locks+0xa5/0xe0
>> [ 527.030009] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
>> [ 527.030044] ? check_flush_dependency+0x350/0x350
>> [ 527.030082] ? ath11k_mac_op_remove_interface+0x58b/0xa20 [ath11k]
>> [ 527.030131] ? ieee80211_stop_device+0x50/0x60 [mac80211]
>> [ 527.030241] ieee80211_stop_device+0x50/0x60 [mac80211]
>> [ 527.030321] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
>> [ 527.030397] ? mutex_lock_io_nested+0x1470/0x1470
>> [ 527.030436] ? lock_downgrade+0x130/0x130
>> [ 527.030473] ? ieee80211_adjust_monitor_flags+0x1f0/0x1f0 [mac80211]
>> [ 527.030547] ? mark_held_locks+0xa5/0xe0
>> [ 527.030583] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
>> [ 527.030618] ? __local_bh_enable_ip+0xa0/0x110
>> [ 527.030654] ieee80211_stop+0xad/0x680 [mac80211]
>> [ 527.030728] __dev_close_many+0x18f/0x2a0
>> [ 527.030764] ? unregister_netdevice_notifier+0x150/0x150
>> [ 527.030799] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
>> [ 527.030834] ? __local_bh_enable_ip+0xa0/0x110
>> [ 527.030869] __dev_change_flags+0x264/0x680
>> [ 527.030903] ? dev_set_allmulti+0x10/0x10
>> [ 527.030940] dev_change_flags+0x86/0x150
>> [ 527.030976] devinet_ioctl+0xfbb/0x18f0
>> [ 527.031011] inet_ioctl+0x2ae/0x2f0
>> [ 527.031048] ? inet_dgram_connect+0x220/0x220
>> [ 527.031087] ? lock_downgrade+0x130/0x130
>> [ 527.032054] ? __might_fault+0xb3/0x160
>> [ 527.032090] ? __might_fault+0xb3/0x160
>> [ 527.032124] ? _copy_to_user+0x94/0xb0
>> [ 527.032160] sock_do_ioctl+0xd5/0x1d0
>> [ 527.032216] ? put_user_ifreq+0x70/0x70
>> [ 527.032279] ? vfs_fileattr_set+0x930/0x930
>> [ 527.032314] ? selinux_file_ioctl+0x375/0x520
>> [ 527.032350] sock_ioctl+0x1c1/0x570
>> [ 527.032385] ? br_ioctl_call+0x90/0x90
>> [ 527.032420] ? __ia32_sys_sendmmsg+0xeb/0xf0
>> [ 527.032454] ? __sys_recvmsg_sock+0x10/0x10
>> [ 527.032492] __x64_sys_ioctl+0x122/0x190
>> [ 527.032527] do_syscall_64+0x3b/0x90
>> [ 527.032562] entry_SYSCALL_64_after_hwframe+0x44/0xae
>> [ 527.032597] RIP: 0033:0x7fd37113850b
>> [ 527.032636] Code: 0f 1e fa 48 8b 05 85 39 0d 00 64 c7 00 26 00 00
>> 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00
>> 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 55 39 0d 00 f7 d8 64
>> 89 01 48
>> [ 527.032679] RSP: 002b:00007ffd0174b258 EFLAGS: 00000246 ORIG_RAX:
>> 0000000000000010
>> [ 527.032718] RAX: ffffffffffffffda RBX: 0000000000000000 RCX:
>> 00007fd37113850b
>> [ 527.032755] RDX: 00007ffd0174b260 RSI: 0000000000008914 RDI:
>> 0000000000000008
>> [ 527.032790] RBP: 0000000000000008 R08: 0000000000000007 R09:
>> 00007fd37120cb80
>> [ 527.032824] R10: 0000000000000007 R11: 0000000000000246 R12:
>> 0000000000000000
>> [ 527.032857] R13: 00005641e16bfa70 R14: 00007ffd0174b260 R15:
>> 00005641e16b4840
>> [ 527.032894] </TASK>
>>
Hi Kalle,
I have reproduced the "WARNING: possible circular locking dependency
detected" which is same with you while stop wlan.
the reason is not directly relative with "ath11k: add 11d scan offload
support for QCA6390/WCN6855".
it is because the ieee80211_queue_work(ar->hw, &ar->regd_update_work) in
function ath11k_reg_chan_list_event().
I also see the same warning after I removed 11d scan and run "iw reg set
US" instead to trigger the ieee80211_queue_work(ar->hw,
&ar->regd_update_work).
And the real deadlock happened in
https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]/
which I hit.
This warning gone by change "ieee80211_queue_work(ar->hw,
&ar->regd_update_work)" to "queue_work(ab->workqueue,
&ar->regd_update_work)" in my test on tag ath-202111221111.
On 11/26/2021 7:23 PM, Wen Gong wrote:
> Hi Kalle,
>
> I read the 2 patches of "11d scan offload" again, not found it will
> introduce this new lockdep directly.
>
> Could you tell what the steps/operation in your test?
>
> I can try to reproduce it after enable the lockdep config.
>
> On 11/25/2021 7:01 PM, Wen Gong wrote:
>> Hi Kalle,
>>
>> I am afraid you hit same issue of below patch, they looks similar,
>> but I am not sure they are the same root cause.
>>
>> https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]/
>>
>>
>> [RFC] ath11k: fix blocked for more than 120 seconds caused by reg update
>>
>> On 11/22/2021 8:28 PM, Kalle Valo wrote:
>>> Wen Gong <[email protected]> writes:
>>>
>>>> v2:
>>>> 1. rebased to latest ath.git master ath-202111170737
>>>> 2. add "ath11k: add configure country code for QCA6390 and
>>>> WCN6855", it is needed for
>>>> patch "ath11k: add 11d scan offload support"
>>>>
>>>> Wen Gong (2):
>>>> ath11k: add configure country code for QCA6390 and WCN6855
>>>> ath11k: add 11d scan offload support
>>>>
>>>> drivers/net/wireless/ath/ath11k/core.c | 30 +++++
>>>> drivers/net/wireless/ath/ath11k/core.h | 9 ++
>>>> drivers/net/wireless/ath/ath11k/mac.c | 162
>>>> ++++++++++++++++++++++++-
>>>> drivers/net/wireless/ath/ath11k/mac.h | 7 ++
>>>> drivers/net/wireless/ath/ath11k/pci.c | 1 +
>>>> drivers/net/wireless/ath/ath11k/reg.c | 15 +++
>>>> drivers/net/wireless/ath/ath11k/wmi.c | 145 ++++++++++++++++++++++
>>>> drivers/net/wireless/ath/ath11k/wmi.h | 39 ++++++
>>>> 8 files changed, 407 insertions(+), 1 deletion(-)
>>> I suspect this patch adds a new lockdep warning on my NUC testbox.
>>>
>>> Tag: ath-202111221111
>>>
>>> [ 87.034989] ath11k_pci 0000:06:00.0: MSI vectors: 32
>>> [ 87.035059] ath11k_pci 0000:06:00.0: qca6390 hw2.0
>>> [ 87.684032] ath11k_pci 0000:06:00.0: chip_id 0x0 chip_family 0xb
>>> board_id 0xff soc_id 0xffffffff
>>> [ 87.684277] ath11k_pci 0000:06:00.0: fw_version 0x101c06cc
>>> fw_build_timestamp 2020-06-24 19:50 fw_build
>>>
>>> [...]
>>>
>>> [ 527.024672] ======================================================
>>> [ 527.024708] WARNING: possible circular locking dependency detected
>>> [ 527.024746] 5.16.0-rc1-wt-ath+ #528 Not tainted
>>> [ 527.024785] ------------------------------------------------------
>>> [ 527.024819] wpa_supplicant/2309 is trying to acquire lock:
>>> [ 527.024857] ffff88811fe6f148 ((wq_completion)phy0){+.+.}-{0:0},
>>> at: flush_workqueue+0xd9/0x1340
>>> [ 527.024901]
>>> but task is already holding lock:
>>> [ 527.024934] ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3}, at:
>>> ieee80211_stop+0xa0/0x680 [mac80211]
>>> [ 527.025023]
>>> which lock already depends on the new lock.
>>>
>>> [ 527.025058]
>>> the existing dependency chain (in reverse order) is:
>>> [ 527.025091]
>>> -> #3 (&rdev->wiphy.mtx){+.+.}-{3:3}:
>>> [ 527.025129] __lock_acquire+0xb72/0x1870
>>> [ 527.025166] lock_acquire.part.0+0x117/0x340
>>> [ 527.025219] __mutex_lock+0x15a/0x1610
>>> [ 527.025267] reg_process_self_managed_hints+0x5e/0x130 [cfg80211]
>>> [ 527.025343] wiphy_register+0x1607/0x2640 [cfg80211]
>>> [ 527.025409] ieee80211_register_hw+0x17d5/0x3150 [mac80211]
>>> [ 527.025481] __ath11k_mac_register+0x1944/0x25c0 [ath11k]
>>> [ 527.025530] ath11k_mac_register+0x2ee/0x610 [ath11k]
>>> [ 527.025578] ath11k_core_qmi_firmware_ready.part.0+0x9e/0x2b0
>>> [ath11k]
>>> [ 527.025626] ath11k_qmi_driver_event_work+0x49c/0xa80 [ath11k]
>>> [ 527.025674] process_one_work+0x866/0x1490
>>> [ 527.026142] worker_thread+0x596/0x1010
>>> [ 527.026180] kthread+0x35d/0x420
>>> [ 527.026247] ret_from_fork+0x22/0x30
>>> [ 527.026282]
>>> -> #2 (rtnl_mutex){+.+.}-{3:3}:
>>> [ 527.026319] __lock_acquire+0xb72/0x1870
>>> [ 527.026355] lock_acquire.part.0+0x117/0x340
>>> [ 527.026388] __mutex_lock+0x15a/0x1610
>>> [ 527.026423] ath11k_regd_update+0x1ce/0x580 [ath11k]
>>> [ 527.026471] process_one_work+0x866/0x1490
>>> [ 527.026505] worker_thread+0x596/0x1010
>>> [ 527.026540] kthread+0x35d/0x420
>>> [ 527.026574] ret_from_fork+0x22/0x30
>>> [ 527.026608]
>>> -> #1
>>> ((work_completion)(&ar->regd_update_work)){+.+.}-{0:0}:
>>> [ 527.026645] __lock_acquire+0xb72/0x1870
>>> [ 527.026679] lock_acquire.part.0+0x117/0x340
>>> [ 527.026714] process_one_work+0x7f6/0x1490
>>> [ 527.026748] worker_thread+0x596/0x1010
>>> [ 527.026782] kthread+0x35d/0x420
>>> [ 527.026814] ret_from_fork+0x22/0x30
>>> [ 527.026848]
>>> -> #0 ((wq_completion)phy0){+.+.}-{0:0}:
>>> [ 527.026883] check_prev_add+0x15e/0x20f0
>>> [ 527.026917] validate_chain+0xf7f/0x1b30
>>> [ 527.026957] __lock_acquire+0xb72/0x1870
>>> [ 527.026992] lock_acquire.part.0+0x117/0x340
>>> [ 527.027026] flush_workqueue+0xfc/0x1340
>>> [ 527.027061] ieee80211_stop_device+0x50/0x60 [mac80211]
>>> [ 527.027142] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
>>> [ 527.027248] ieee80211_stop+0xad/0x680 [mac80211]
>>> [ 527.027322] __dev_close_many+0x18f/0x2a0
>>> [ 527.027357] __dev_change_flags+0x264/0x680
>>> [ 527.027391] dev_change_flags+0x86/0x150
>>> [ 527.027425] devinet_ioctl+0xfbb/0x18f0
>>> [ 527.027460] inet_ioctl+0x2ae/0x2f0
>>> [ 527.027493] sock_do_ioctl+0xd5/0x1d0
>>> [ 527.027527] sock_ioctl+0x1c1/0x570
>>> [ 527.027561] __x64_sys_ioctl+0x122/0x190
>>> [ 527.027598] do_syscall_64+0x3b/0x90
>>> [ 527.027631] entry_SYSCALL_64_after_hwframe+0x44/0xae
>>> [ 527.027666]
>>> other info that might help us debug this:
>>>
>>> [ 527.027700] Chain exists of:
>>> (wq_completion)phy0 --> rtnl_mutex -->
>>> &rdev->wiphy.mtx
>>>
>>> [ 527.027739] Possible unsafe locking scenario:
>>>
>>> [ 527.027772] CPU0 CPU1
>>> [ 527.027808] ---- ----
>>> [ 527.027841] lock(&rdev->wiphy.mtx);
>>> [ 527.027880] lock(rtnl_mutex);
>>> [ 527.027916] lock(&rdev->wiphy.mtx);
>>> [ 527.027950] lock((wq_completion)phy0);
>>> [ 527.027984]
>>> *** DEADLOCK ***
>>>
>>> [ 527.028017] 2 locks held by wpa_supplicant/2309:
>>> [ 527.028051] #0: ffffffff8ff3cb70 (rtnl_mutex){+.+.}-{3:3}, at:
>>> devinet_ioctl+0x182/0x18f0
>>> [ 527.029006] #1: ffff8881563b07d0 (&rdev->wiphy.mtx){+.+.}-{3:3},
>>> at: ieee80211_stop+0xa0/0x680 [mac80211]
>>> [ 527.029087]
>>> stack backtrace:
>>> [ 527.029121] CPU: 6 PID: 2309 Comm: wpa_supplicant Kdump: loaded
>>> Not tainted 5.16.0-rc1-wt-ath+ #528
>>> [ 527.029158] Hardware name: Intel(R) Client Systems
>>> NUC8i7HVK/NUC8i7HVB, BIOS HNKBLi70.86A.0067.2021.0528.1339 05/28/2021
>>> [ 527.029211] Call Trace:
>>> [ 527.029246] <TASK>
>>> [ 527.029292] dump_stack_lvl+0x57/0x7d
>>> [ 527.029328] check_noncircular+0x26a/0x310
>>> [ 527.029363] ? print_circular_bug+0x450/0x450
>>> [ 527.029403] ? __kernel_text_address+0x9/0x30
>>> [ 527.029439] ? alloc_chain_hlocks+0x1de/0x530
>>> [ 527.029474] check_prev_add+0x15e/0x20f0
>>> [ 527.029511] ? __lock_acquire+0xb72/0x1870
>>> [ 527.029547] validate_chain+0xf7f/0x1b30
>>> [ 527.029583] ? check_prev_add+0x20f0/0x20f0
>>> [ 527.029618] ? __lock_release+0x4bd/0x9f0
>>> [ 527.029655] __lock_acquire+0xb72/0x1870
>>> [ 527.029691] lock_acquire.part.0+0x117/0x340
>>> [ 527.029727] ? flush_workqueue+0xd9/0x1340
>>> [ 527.029763] ? rcu_read_unlock+0x40/0x40
>>> [ 527.029799] ? rcu_read_lock_sched_held+0x3a/0x70
>>> [ 527.029833] ? lock_acquire+0x1a8/0x210
>>> [ 527.029868] ? flush_workqueue+0xd9/0x1340
>>> [ 527.029903] flush_workqueue+0xfc/0x1340
>>> [ 527.029936] ? flush_workqueue+0xd9/0x1340
>>> [ 527.029970] ? mark_held_locks+0xa5/0xe0
>>> [ 527.030009] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
>>> [ 527.030044] ? check_flush_dependency+0x350/0x350
>>> [ 527.030082] ? ath11k_mac_op_remove_interface+0x58b/0xa20 [ath11k]
>>> [ 527.030131] ? ieee80211_stop_device+0x50/0x60 [mac80211]
>>> [ 527.030241] ieee80211_stop_device+0x50/0x60 [mac80211]
>>> [ 527.030321] ieee80211_do_stop+0x11cf/0x1a20 [mac80211]
>>> [ 527.030397] ? mutex_lock_io_nested+0x1470/0x1470
>>> [ 527.030436] ? lock_downgrade+0x130/0x130
>>> [ 527.030473] ? ieee80211_adjust_monitor_flags+0x1f0/0x1f0 [mac80211]
>>> [ 527.030547] ? mark_held_locks+0xa5/0xe0
>>> [ 527.030583] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
>>> [ 527.030618] ? __local_bh_enable_ip+0xa0/0x110
>>> [ 527.030654] ieee80211_stop+0xad/0x680 [mac80211]
>>> [ 527.030728] __dev_close_many+0x18f/0x2a0
>>> [ 527.030764] ? unregister_netdevice_notifier+0x150/0x150
>>> [ 527.030799] ? lockdep_hardirqs_on_prepare.part.0+0x18c/0x370
>>> [ 527.030834] ? __local_bh_enable_ip+0xa0/0x110
>>> [ 527.030869] __dev_change_flags+0x264/0x680
>>> [ 527.030903] ? dev_set_allmulti+0x10/0x10
>>> [ 527.030940] dev_change_flags+0x86/0x150
>>> [ 527.030976] devinet_ioctl+0xfbb/0x18f0
>>> [ 527.031011] inet_ioctl+0x2ae/0x2f0
>>> [ 527.031048] ? inet_dgram_connect+0x220/0x220
>>> [ 527.031087] ? lock_downgrade+0x130/0x130
>>> [ 527.032054] ? __might_fault+0xb3/0x160
>>> [ 527.032090] ? __might_fault+0xb3/0x160
>>> [ 527.032124] ? _copy_to_user+0x94/0xb0
>>> [ 527.032160] sock_do_ioctl+0xd5/0x1d0
>>> [ 527.032216] ? put_user_ifreq+0x70/0x70
>>> [ 527.032279] ? vfs_fileattr_set+0x930/0x930
>>> [ 527.032314] ? selinux_file_ioctl+0x375/0x520
>>> [ 527.032350] sock_ioctl+0x1c1/0x570
>>> [ 527.032385] ? br_ioctl_call+0x90/0x90
>>> [ 527.032420] ? __ia32_sys_sendmmsg+0xeb/0xf0
>>> [ 527.032454] ? __sys_recvmsg_sock+0x10/0x10
>>> [ 527.032492] __x64_sys_ioctl+0x122/0x190
>>> [ 527.032527] do_syscall_64+0x3b/0x90
>>> [ 527.032562] entry_SYSCALL_64_after_hwframe+0x44/0xae
>>> [ 527.032597] RIP: 0033:0x7fd37113850b
>>> [ 527.032636] Code: 0f 1e fa 48 8b 05 85 39 0d 00 64 c7 00 26 00 00
>>> 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00
>>> 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 55 39 0d 00 f7 d8 64
>>> 89 01 48
>>> [ 527.032679] RSP: 002b:00007ffd0174b258 EFLAGS: 00000246 ORIG_RAX:
>>> 0000000000000010
>>> [ 527.032718] RAX: ffffffffffffffda RBX: 0000000000000000 RCX:
>>> 00007fd37113850b
>>> [ 527.032755] RDX: 00007ffd0174b260 RSI: 0000000000008914 RDI:
>>> 0000000000000008
>>> [ 527.032790] RBP: 0000000000000008 R08: 0000000000000007 R09:
>>> 00007fd37120cb80
>>> [ 527.032824] R10: 0000000000000007 R11: 0000000000000246 R12:
>>> 0000000000000000
>>> [ 527.032857] R13: 00005641e16bfa70 R14: 00007ffd0174b260 R15:
>>> 00005641e16b4840
>>> [ 527.032894] </TASK>
>>>