v3:
1. rebased to latest ath.git master ath-202111221436
2. add "ath11k: avoid deadlock by change ieee80211_queue_work for regd_update_work",
it is to fix deadlock warning
3. move "cancel_work_sync(&ab->update_11d_work)" out from pci.c to mac.c/core.c
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 (3):
ath11k: avoid deadlock by change ieee80211_queue_work for
regd_update_work
ath11k: add configure country code for QCA6390 and WCN6855
ath11k: add 11d scan offload support
drivers/net/wireless/ath/ath11k/core.c | 31 +++++
drivers/net/wireless/ath/ath11k/core.h | 9 ++
drivers/net/wireless/ath/ath11k/mac.c | 163 ++++++++++++++++++++++++-
drivers/net/wireless/ath/ath11k/mac.h | 7 ++
drivers/net/wireless/ath/ath11k/reg.c | 15 +++
drivers/net/wireless/ath/ath11k/wmi.c | 147 +++++++++++++++++++++-
drivers/net/wireless/ath/ath11k/wmi.h | 39 ++++++
7 files changed, 409 insertions(+), 2 deletions(-)
base-commit: e5118670f6edde897ab17c3467efd24ad334fe7b
--
2.31.1
When enable debug config, it print below warning while shut down wlan
interface shuh as run "ifconfig wlan0 down".
The reason is because ar->regd_update_work is ran once, and it is will
call wiphy_lock(ar->hw->wiphy) in function ath11k_regd_update() which
is running in workqueue of ieee80211_local queued by ieee80211_queue_work().
Another thread from "ifconfig wlan0 down" will also accuqire the lock
by wiphy_lock(sdata->local->hw.wiphy) in function ieee80211_stop(), and
then it call ieee80211_stop_device() to flush_workqueue(local->workqueue),
this will wait the workqueue of ieee80211_local finished. Then deadlock
will happen easily if the two thread run meanwhile.
Below warning disappeared after this change.
[ 914.088798] ath11k_pci 0000:05:00.0: mac remove interface (vdev 0)
[ 914.088806] ath11k_pci 0000:05:00.0: mac stop 11d scan
[ 914.088810] ath11k_pci 0000:05:00.0: mac stop 11d vdev id 0
[ 914.088827] ath11k_pci 0000:05:00.0: htc ep 2 consumed 1 credits (total 0)
[ 914.088841] ath11k_pci 0000:05:00.0: send 11d scan stop vdev id 0
[ 914.088849] ath11k_pci 0000:05:00.0: htc insufficient credits ep 2 required 1 available 0
[ 914.088856] ath11k_pci 0000:05:00.0: htc insufficient credits ep 2 required 1 available 0
[ 914.096434] ath11k_pci 0000:05:00.0: rx ce pipe 2 len 16
[ 914.096442] ath11k_pci 0000:05:00.0: htc ep 2 got 1 credits (total 1)
[ 914.096481] ath11k_pci 0000:05:00.0: htc ep 2 consumed 1 credits (total 0)
[ 914.096491] ath11k_pci 0000:05:00.0: WMI vdev delete id 0
[ 914.111598] ath11k_pci 0000:05:00.0: rx ce pipe 2 len 16
[ 914.111628] ath11k_pci 0000:05:00.0: htc ep 2 got 1 credits (total 1)
[ 914.114659] ath11k_pci 0000:05:00.0: rx ce pipe 2 len 20
[ 914.114742] ath11k_pci 0000:05:00.0: htc rx completion ep 2 skb pK-error
[ 914.115977] ath11k_pci 0000:05:00.0: vdev delete resp for vdev id 0
[ 914.116685] ath11k_pci 0000:05:00.0: vdev 00:03:7f:29:61:11 deleted, vdev_id 0
[ 914.117583] ======================================================
[ 914.117592] WARNING: possible circular locking dependency detected
[ 914.117600] 5.16.0-rc1-wt-ath+ #1 Tainted: G OE
[ 914.117611] ------------------------------------------------------
[ 914.117618] ifconfig/2805 is trying to acquire lock:
[ 914.117628] ffff9c00a62bb548 ((wq_completion)phy0){+.+.}-{0:0}, at: flush_workqueue+0x87/0x470
[ 914.117674]
but task is already holding lock:
[ 914.117682] ffff9c00baea07d0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: ieee80211_stop+0x38/0x180 [mac80211]
[ 914.117872]
which lock already depends on the new lock.
[ 914.117880]
the existing dependency chain (in reverse order) is:
[ 914.117888]
-> #3 (&rdev->wiphy.mtx){+.+.}-{4:4}:
[ 914.117910] __mutex_lock+0xa0/0x9c0
[ 914.117930] mutex_lock_nested+0x1b/0x20
[ 914.117944] reg_process_self_managed_hints+0x3a/0xb0 [cfg80211]
[ 914.118093] wiphy_regulatory_register+0x47/0x80 [cfg80211]
[ 914.118229] wiphy_register+0x84f/0x9c0 [cfg80211]
[ 914.118353] ieee80211_register_hw+0x6b1/0xd90 [mac80211]
[ 914.118486] ath11k_mac_register+0x6af/0xb60 [ath11k]
[ 914.118550] ath11k_core_qmi_firmware_ready+0x383/0x4a0 [ath11k]
[ 914.118598] ath11k_qmi_driver_event_work+0x347/0x4a0 [ath11k]
[ 914.118656] process_one_work+0x228/0x670
[ 914.118669] worker_thread+0x4d/0x440
[ 914.118680] kthread+0x16d/0x1b0
[ 914.118697] ret_from_fork+0x22/0x30
[ 914.118714]
-> #2 (rtnl_mutex){+.+.}-{4:4}:
[ 914.118736] __mutex_lock+0xa0/0x9c0
[ 914.118751] mutex_lock_nested+0x1b/0x20
[ 914.118767] rtnl_lock+0x17/0x20
[ 914.118783] ath11k_regd_update+0x15a/0x260 [ath11k]
[ 914.118841] ath11k_regd_update_work+0x15/0x20 [ath11k]
[ 914.118897] process_one_work+0x228/0x670
[ 914.118909] worker_thread+0x4d/0x440
[ 914.118920] kthread+0x16d/0x1b0
[ 914.118934] ret_from_fork+0x22/0x30
[ 914.118948]
-> #1 ((work_completion)(&ar->regd_update_work)){+.+.}-{0:0}:
[ 914.118972] process_one_work+0x1fa/0x670
[ 914.118984] worker_thread+0x4d/0x440
[ 914.118996] kthread+0x16d/0x1b0
[ 914.119010] ret_from_fork+0x22/0x30
[ 914.119023]
-> #0 ((wq_completion)phy0){+.+.}-{0:0}:
[ 914.119045] __lock_acquire+0x146d/0x1cf0
[ 914.119057] lock_acquire+0x19b/0x360
[ 914.119067] flush_workqueue+0xae/0x470
[ 914.119084] ieee80211_stop_device+0x3b/0x50 [mac80211]
[ 914.119260] ieee80211_do_stop+0x5d7/0x830 [mac80211]
[ 914.119409] ieee80211_stop+0x45/0x180 [mac80211]
[ 914.119557] __dev_close_many+0xb3/0x120
[ 914.119573] __dev_change_flags+0xc3/0x1d0
[ 914.119590] dev_change_flags+0x29/0x70
[ 914.119605] devinet_ioctl+0x653/0x810
[ 914.119620] inet_ioctl+0x193/0x1e0
[ 914.119631] sock_do_ioctl+0x4d/0xf0
[ 914.119649] sock_ioctl+0x262/0x340
[ 914.119665] __x64_sys_ioctl+0x96/0xd0
[ 914.119678] do_syscall_64+0x3d/0xd0
[ 914.119694] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 914.119709]
other info that might help us debug this:
[ 914.119717] Chain exists of:
(wq_completion)phy0 --> rtnl_mutex --> &rdev->wiphy.mtx
[ 914.119745] Possible unsafe locking scenario:
[ 914.119752] CPU0 CPU1
[ 914.119758] ---- ----
[ 914.119765] lock(&rdev->wiphy.mtx);
[ 914.119778] lock(rtnl_mutex);
[ 914.119792] lock(&rdev->wiphy.mtx);
[ 914.119807] lock((wq_completion)phy0);
[ 914.119819]
*** DEADLOCK ***
[ 914.119827] 2 locks held by ifconfig/2805:
[ 914.119837] #0: ffffffffba3dc010 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x17/0x20
[ 914.119872] #1: ffff9c00baea07d0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: ieee80211_stop+0x38/0x180 [mac80211]
[ 914.120039]
stack backtrace:
[ 914.120048] CPU: 0 PID: 2805 Comm: ifconfig Tainted: G OE 5.16.0-rc1-wt-ath+ #1
[ 914.120064] Hardware name: LENOVO 418065C/418065C, BIOS 83ET63WW (1.33 ) 07/29/2011
[ 914.120074] Call Trace:
[ 914.120084] <TASK>
[ 914.120094] dump_stack_lvl+0x73/0xa4
[ 914.120119] dump_stack+0x10/0x12
[ 914.120135] print_circular_bug.isra.44+0x221/0x2e0
[ 914.120165] check_noncircular+0x106/0x150
[ 914.120203] __lock_acquire+0x146d/0x1cf0
[ 914.120215] ? __lock_acquire+0x146d/0x1cf0
[ 914.120245] lock_acquire+0x19b/0x360
[ 914.120259] ? flush_workqueue+0x87/0x470
[ 914.120286] ? lockdep_init_map_type+0x6b/0x250
[ 914.120310] flush_workqueue+0xae/0x470
[ 914.120327] ? flush_workqueue+0x87/0x470
[ 914.120344] ? lockdep_hardirqs_on+0xd7/0x150
[ 914.120391] ieee80211_stop_device+0x3b/0x50 [mac80211]
[ 914.120565] ? ieee80211_stop_device+0x3b/0x50 [mac80211]
[ 914.120736] ieee80211_do_stop+0x5d7/0x830 [mac80211]
[ 914.120906] ieee80211_stop+0x45/0x180 [mac80211]
[ 914.121060] __dev_close_many+0xb3/0x120
[ 914.121081] __dev_change_flags+0xc3/0x1d0
[ 914.121109] dev_change_flags+0x29/0x70
[ 914.121131] devinet_ioctl+0x653/0x810
[ 914.121149] ? __might_fault+0x77/0x80
[ 914.121179] inet_ioctl+0x193/0x1e0
[ 914.121194] ? inet_ioctl+0x193/0x1e0
[ 914.121218] ? __might_fault+0x77/0x80
[ 914.121238] ? _copy_to_user+0x68/0x80
[ 914.121266] sock_do_ioctl+0x4d/0xf0
[ 914.121283] ? inet_stream_connect+0x60/0x60
[ 914.121297] ? sock_do_ioctl+0x4d/0xf0
[ 914.121329] sock_ioctl+0x262/0x340
[ 914.121347] ? sock_ioctl+0x262/0x340
[ 914.121362] ? exit_to_user_mode_prepare+0x13b/0x280
[ 914.121388] ? syscall_enter_from_user_mode+0x20/0x50
[ 914.121416] __x64_sys_ioctl+0x96/0xd0
[ 914.121430] ? br_ioctl_call+0x90/0x90
[ 914.121445] ? __x64_sys_ioctl+0x96/0xd0
[ 914.121465] do_syscall_64+0x3d/0xd0
[ 914.121482] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 914.121497] RIP: 0033:0x7f0ed051737b
[ 914.121513] Code: 0f 1e fa 48 8b 05 15 3b 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 e5 3a 0d 00 f7 d8 64 89 01 48
[ 914.121527] RSP: 002b:00007fff7be38b98 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[ 914.121544] RAX: ffffffffffffffda RBX: 00007fff7be38ba0 RCX: 00007f0ed051737b
[ 914.121555] RDX: 00007fff7be38ba0 RSI: 0000000000008914 RDI: 0000000000000004
[ 914.121566] RBP: 00007fff7be38c60 R08: 000000000000000a R09: 0000000000000001
[ 914.121576] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000fffffffe
[ 914.121586] R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
[ 914.121620] </TASK>
Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
Signed-off-by: Wen Gong <[email protected]>
---
drivers/net/wireless/ath/ath11k/wmi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath11k/wmi.c b/drivers/net/wireless/ath/ath11k/wmi.c
index 87351e0a269d..a3a8c49b3329 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -6032,7 +6032,7 @@ static int ath11k_reg_chan_list_event(struct ath11k_base *ab, struct sk_buff *sk
ar = ab->pdevs[pdev_idx].ar;
kfree(ab->new_regd[pdev_idx]);
ab->new_regd[pdev_idx] = regd;
- ieee80211_queue_work(ar->hw, &ar->regd_update_work);
+ queue_work(ab->workqueue, &ar->regd_update_work);
} else {
/* This regd would be applied during mac registration and is
* held constant throughout for regd intersection purpose
--
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 a3a8c49b3329..47361256bfeb 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -2798,6 +2798,42 @@ 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 8e8bac1b7370..49db414d0bf3 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 | 31 +++++
drivers/net/wireless/ath/ath11k/core.h | 9 ++
drivers/net/wireless/ath/ath11k/mac.c | 163 ++++++++++++++++++++++++-
drivers/net/wireless/ath/ath11k/mac.h | 7 ++
drivers/net/wireless/ath/ath11k/reg.c | 15 +++
drivers/net/wireless/ath/ath11k/wmi.c | 109 +++++++++++++++++
drivers/net/wireless/ath/ath11k/wmi.h | 27 ++++
7 files changed, 360 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index a3a9bfef0c38..cd7e568a6c07 100644
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -1122,6 +1122,7 @@ void ath11k_core_halt(struct ath11k *ar)
ath11k_mac_peer_cleanup_all(ar);
cancel_delayed_work_sync(&ar->scan.timeout);
cancel_work_sync(&ar->regd_update_work);
+ cancel_work_sync(&ab->update_11d_work);
rcu_assign_pointer(ab->pdevs_active[ar->pdev_idx], NULL);
synchronize_rcu();
@@ -1129,6 +1130,34 @@ 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);
@@ -1298,12 +1327,14 @@ 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 7b1770ae0e7c..89a47d63e088 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -587,6 +587,11 @@ 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 {
@@ -761,6 +766,8 @@ 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;
@@ -770,6 +777,8 @@ 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 06d20658586a..de897a7500c6 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -2680,6 +2680,8 @@ 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,
@@ -3409,6 +3411,7 @@ 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);
@@ -3419,7 +3422,14 @@ 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)
@@ -3476,6 +3486,26 @@ 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;
@@ -5620,6 +5650,7 @@ static void ath11k_mac_op_stop(struct ieee80211_hw *hw)
cancel_delayed_work_sync(&ar->scan.timeout);
cancel_work_sync(&ar->regd_update_work);
+ cancel_work_sync(&ar->ab->update_11d_work);
spin_lock_bh(&ar->data_lock);
list_for_each_entry_safe(ppdu_stats, tmp, &ar->ppdu_stats_info, list) {
@@ -5773,6 +5804,122 @@ 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)
{
@@ -5906,6 +6053,8 @@ 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;
@@ -5945,6 +6094,9 @@ 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);
@@ -6046,6 +6198,9 @@ 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)
@@ -6764,6 +6919,9 @@ 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);
}
@@ -8165,6 +8323,9 @@ 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 359e5e9ca904..035d6738c20b 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/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 47361256bfeb..db90af054f05 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_) \
@@ -2898,6 +2900,75 @@ 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;
@@ -5938,6 +6009,41 @@ 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)
{
@@ -7333,6 +7439,9 @@ 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 49db414d0bf3..735f5a560b18 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]> wrote:
> When enable debug config, it print below warning while shut down wlan
> interface shuh as run "ifconfig wlan0 down".
>
> The reason is because ar->regd_update_work is ran once, and it is will
> call wiphy_lock(ar->hw->wiphy) in function ath11k_regd_update() which
> is running in workqueue of ieee80211_local queued by ieee80211_queue_work().
> Another thread from "ifconfig wlan0 down" will also accuqire the lock
> by wiphy_lock(sdata->local->hw.wiphy) in function ieee80211_stop(), and
> then it call ieee80211_stop_device() to flush_workqueue(local->workqueue),
> this will wait the workqueue of ieee80211_local finished. Then deadlock
> will happen easily if the two thread run meanwhile.
>
> Below warning disappeared after this change.
>
> [ 914.088798] ath11k_pci 0000:05:00.0: mac remove interface (vdev 0)
> [ 914.088806] ath11k_pci 0000:05:00.0: mac stop 11d scan
> [ 914.088810] ath11k_pci 0000:05:00.0: mac stop 11d vdev id 0
> [ 914.088827] ath11k_pci 0000:05:00.0: htc ep 2 consumed 1 credits (total 0)
> [ 914.088841] ath11k_pci 0000:05:00.0: send 11d scan stop vdev id 0
> [ 914.088849] ath11k_pci 0000:05:00.0: htc insufficient credits ep 2 required 1 available 0
> [ 914.088856] ath11k_pci 0000:05:00.0: htc insufficient credits ep 2 required 1 available 0
> [ 914.096434] ath11k_pci 0000:05:00.0: rx ce pipe 2 len 16
> [ 914.096442] ath11k_pci 0000:05:00.0: htc ep 2 got 1 credits (total 1)
> [ 914.096481] ath11k_pci 0000:05:00.0: htc ep 2 consumed 1 credits (total 0)
> [ 914.096491] ath11k_pci 0000:05:00.0: WMI vdev delete id 0
> [ 914.111598] ath11k_pci 0000:05:00.0: rx ce pipe 2 len 16
> [ 914.111628] ath11k_pci 0000:05:00.0: htc ep 2 got 1 credits (total 1)
> [ 914.114659] ath11k_pci 0000:05:00.0: rx ce pipe 2 len 20
> [ 914.114742] ath11k_pci 0000:05:00.0: htc rx completion ep 2 skb pK-error
> [ 914.115977] ath11k_pci 0000:05:00.0: vdev delete resp for vdev id 0
> [ 914.116685] ath11k_pci 0000:05:00.0: vdev 00:03:7f:29:61:11 deleted, vdev_id 0
>
> [ 914.117583] ======================================================
> [ 914.117592] WARNING: possible circular locking dependency detected
> [ 914.117600] 5.16.0-rc1-wt-ath+ #1 Tainted: G OE
> [ 914.117611] ------------------------------------------------------
> [ 914.117618] ifconfig/2805 is trying to acquire lock:
> [ 914.117628] ffff9c00a62bb548 ((wq_completion)phy0){+.+.}-{0:0}, at: flush_workqueue+0x87/0x470
> [ 914.117674]
> but task is already holding lock:
> [ 914.117682] ffff9c00baea07d0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: ieee80211_stop+0x38/0x180 [mac80211]
> [ 914.117872]
> which lock already depends on the new lock.
>
> [ 914.117880]
> the existing dependency chain (in reverse order) is:
> [ 914.117888]
> -> #3 (&rdev->wiphy.mtx){+.+.}-{4:4}:
> [ 914.117910] __mutex_lock+0xa0/0x9c0
> [ 914.117930] mutex_lock_nested+0x1b/0x20
> [ 914.117944] reg_process_self_managed_hints+0x3a/0xb0 [cfg80211]
> [ 914.118093] wiphy_regulatory_register+0x47/0x80 [cfg80211]
> [ 914.118229] wiphy_register+0x84f/0x9c0 [cfg80211]
> [ 914.118353] ieee80211_register_hw+0x6b1/0xd90 [mac80211]
> [ 914.118486] ath11k_mac_register+0x6af/0xb60 [ath11k]
> [ 914.118550] ath11k_core_qmi_firmware_ready+0x383/0x4a0 [ath11k]
> [ 914.118598] ath11k_qmi_driver_event_work+0x347/0x4a0 [ath11k]
> [ 914.118656] process_one_work+0x228/0x670
> [ 914.118669] worker_thread+0x4d/0x440
> [ 914.118680] kthread+0x16d/0x1b0
> [ 914.118697] ret_from_fork+0x22/0x30
> [ 914.118714]
> -> #2 (rtnl_mutex){+.+.}-{4:4}:
> [ 914.118736] __mutex_lock+0xa0/0x9c0
> [ 914.118751] mutex_lock_nested+0x1b/0x20
> [ 914.118767] rtnl_lock+0x17/0x20
> [ 914.118783] ath11k_regd_update+0x15a/0x260 [ath11k]
> [ 914.118841] ath11k_regd_update_work+0x15/0x20 [ath11k]
> [ 914.118897] process_one_work+0x228/0x670
> [ 914.118909] worker_thread+0x4d/0x440
> [ 914.118920] kthread+0x16d/0x1b0
> [ 914.118934] ret_from_fork+0x22/0x30
> [ 914.118948]
> -> #1 ((work_completion)(&ar->regd_update_work)){+.+.}-{0:0}:
> [ 914.118972] process_one_work+0x1fa/0x670
> [ 914.118984] worker_thread+0x4d/0x440
> [ 914.118996] kthread+0x16d/0x1b0
> [ 914.119010] ret_from_fork+0x22/0x30
> [ 914.119023]
> -> #0 ((wq_completion)phy0){+.+.}-{0:0}:
> [ 914.119045] __lock_acquire+0x146d/0x1cf0
> [ 914.119057] lock_acquire+0x19b/0x360
> [ 914.119067] flush_workqueue+0xae/0x470
> [ 914.119084] ieee80211_stop_device+0x3b/0x50 [mac80211]
> [ 914.119260] ieee80211_do_stop+0x5d7/0x830 [mac80211]
> [ 914.119409] ieee80211_stop+0x45/0x180 [mac80211]
> [ 914.119557] __dev_close_many+0xb3/0x120
> [ 914.119573] __dev_change_flags+0xc3/0x1d0
> [ 914.119590] dev_change_flags+0x29/0x70
> [ 914.119605] devinet_ioctl+0x653/0x810
> [ 914.119620] inet_ioctl+0x193/0x1e0
> [ 914.119631] sock_do_ioctl+0x4d/0xf0
> [ 914.119649] sock_ioctl+0x262/0x340
> [ 914.119665] __x64_sys_ioctl+0x96/0xd0
> [ 914.119678] do_syscall_64+0x3d/0xd0
> [ 914.119694] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 914.119709]
> other info that might help us debug this:
>
> [ 914.119717] Chain exists of:
> (wq_completion)phy0 --> rtnl_mutex --> &rdev->wiphy.mtx
>
> [ 914.119745] Possible unsafe locking scenario:
>
> [ 914.119752] CPU0 CPU1
> [ 914.119758] ---- ----
> [ 914.119765] lock(&rdev->wiphy.mtx);
> [ 914.119778] lock(rtnl_mutex);
> [ 914.119792] lock(&rdev->wiphy.mtx);
> [ 914.119807] lock((wq_completion)phy0);
> [ 914.119819]
> *** DEADLOCK ***
>
> [ 914.119827] 2 locks held by ifconfig/2805:
> [ 914.119837] #0: ffffffffba3dc010 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x17/0x20
> [ 914.119872] #1: ffff9c00baea07d0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: ieee80211_stop+0x38/0x180 [mac80211]
> [ 914.120039]
> stack backtrace:
> [ 914.120048] CPU: 0 PID: 2805 Comm: ifconfig Tainted: G OE 5.16.0-rc1-wt-ath+ #1
> [ 914.120064] Hardware name: LENOVO 418065C/418065C, BIOS 83ET63WW (1.33 ) 07/29/2011
> [ 914.120074] Call Trace:
> [ 914.120084] <TASK>
> [ 914.120094] dump_stack_lvl+0x73/0xa4
> [ 914.120119] dump_stack+0x10/0x12
> [ 914.120135] print_circular_bug.isra.44+0x221/0x2e0
> [ 914.120165] check_noncircular+0x106/0x150
> [ 914.120203] __lock_acquire+0x146d/0x1cf0
> [ 914.120215] ? __lock_acquire+0x146d/0x1cf0
> [ 914.120245] lock_acquire+0x19b/0x360
> [ 914.120259] ? flush_workqueue+0x87/0x470
> [ 914.120286] ? lockdep_init_map_type+0x6b/0x250
> [ 914.120310] flush_workqueue+0xae/0x470
> [ 914.120327] ? flush_workqueue+0x87/0x470
> [ 914.120344] ? lockdep_hardirqs_on+0xd7/0x150
> [ 914.120391] ieee80211_stop_device+0x3b/0x50 [mac80211]
> [ 914.120565] ? ieee80211_stop_device+0x3b/0x50 [mac80211]
> [ 914.120736] ieee80211_do_stop+0x5d7/0x830 [mac80211]
> [ 914.120906] ieee80211_stop+0x45/0x180 [mac80211]
> [ 914.121060] __dev_close_many+0xb3/0x120
> [ 914.121081] __dev_change_flags+0xc3/0x1d0
> [ 914.121109] dev_change_flags+0x29/0x70
> [ 914.121131] devinet_ioctl+0x653/0x810
> [ 914.121149] ? __might_fault+0x77/0x80
> [ 914.121179] inet_ioctl+0x193/0x1e0
> [ 914.121194] ? inet_ioctl+0x193/0x1e0
> [ 914.121218] ? __might_fault+0x77/0x80
> [ 914.121238] ? _copy_to_user+0x68/0x80
> [ 914.121266] sock_do_ioctl+0x4d/0xf0
> [ 914.121283] ? inet_stream_connect+0x60/0x60
> [ 914.121297] ? sock_do_ioctl+0x4d/0xf0
> [ 914.121329] sock_ioctl+0x262/0x340
> [ 914.121347] ? sock_ioctl+0x262/0x340
> [ 914.121362] ? exit_to_user_mode_prepare+0x13b/0x280
> [ 914.121388] ? syscall_enter_from_user_mode+0x20/0x50
> [ 914.121416] __x64_sys_ioctl+0x96/0xd0
> [ 914.121430] ? br_ioctl_call+0x90/0x90
> [ 914.121445] ? __x64_sys_ioctl+0x96/0xd0
> [ 914.121465] do_syscall_64+0x3d/0xd0
> [ 914.121482] entry_SYSCALL_64_after_hwframe+0x44/0xae
> [ 914.121497] RIP: 0033:0x7f0ed051737b
> [ 914.121513] Code: 0f 1e fa 48 8b 05 15 3b 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 e5 3a 0d 00 f7 d8 64 89 01 48
> [ 914.121527] RSP: 002b:00007fff7be38b98 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
> [ 914.121544] RAX: ffffffffffffffda RBX: 00007fff7be38ba0 RCX: 00007f0ed051737b
> [ 914.121555] RDX: 00007fff7be38ba0 RSI: 0000000000008914 RDI: 0000000000000004
> [ 914.121566] RBP: 00007fff7be38c60 R08: 000000000000000a R09: 0000000000000001
> [ 914.121576] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000fffffffe
> [ 914.121586] R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
> [ 914.121620] </TASK>
>
> Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
>
> Signed-off-by: Wen Gong <[email protected]>
> Signed-off-by: Kalle Valo <[email protected]>
3 patches applied to ath-next branch of ath.git, thanks.
ed05c7cf1286 ath11k: avoid deadlock by change ieee80211_queue_work for regd_update_work
0b05ddad8e4b ath11k: add configure country code for QCA6390 and WCN6855
9dcf6808b253 ath11k: add 11d scan offload support
--
https://patchwork.kernel.org/project/linux-wireless/patch/[email protected]/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
On Wed, Dec 01, 2021 at 02:17:44AM -0500, Wen Gong wrote:
> +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);
cmd->new_alpha2 is a u32 in this driver. (In a different driver it is a
3 byte array). So this will leave the last byte as random garbage.
Probably harmless but it leads to a Smatch static checker warning.
drivers/net/wireless/ath/ath11k/wmi.c:2837 ath11k_wmi_send_set_current_country_cmd()
warn: not copying enough bytes for '&cmd->new_alpha2' (4 vs 3 bytes)
> + 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;
> +}
regards,
dan carpenter