[PATCH AUTOSEL 5.18 004/159] ath11k: fix the warning of dev_wake in mhi_pm_disable_transition()

[PATCH AUTOSEL 5.18 004/159] ath11k: fix the warning of dev_wake in mhi_pm_disable_transition()

[Sasha Levin]

From: Wen Gong <quic_wgong@quicinc.com>

[ Upstream commit 0d7a8a6204ea9271f1d0a8c66a9fd2f54d2e3cbc ]

When test device recovery with below command, it has warning in message
as below.
echo assert > /sys/kernel/debug/ath11k/wcn6855\ hw2.0/simulate_fw_crash
echo assert > /sys/kernel/debug/ath11k/qca6390\ hw2.0/simulate_fw_crash

warning message:
[ 1965.642121] ath11k_pci 0000:06:00.0: simulating firmware assert crash
[ 1968.471364] ieee80211 phy0: Hardware restart was requested
[ 1968.511305] ------------[ cut here ]------------
[ 1968.511368] WARNING: CPU: 3 PID: 1546 at drivers/bus/mhi/core/pm.c:505 mhi_pm_disable_transition+0xb37/0xda0 [mhi]
[ 1968.511443] Modules linked in: ath11k_pci ath11k mac80211 libarc4 cfg80211 qmi_helpers qrtr_mhi mhi qrtr nvme nvme_core
[ 1968.511563] CPU: 3 PID: 1546 Comm: kworker/u17:0 Kdump: loaded Tainted: G        W         5.17.0-rc3-wt-ath+ #579
[ 1968.511629] Hardware name: Intel(R) Client Systems NUC8i7HVK/NUC8i7HVB, BIOS HNKBLi70.86A.0067.2021.0528.1339 05/28/2021
[ 1968.511704] Workqueue: mhi_hiprio_wq mhi_pm_st_worker [mhi]
[ 1968.511787] RIP: 0010:mhi_pm_disable_transition+0xb37/0xda0 [mhi]
[ 1968.511870] Code: a9 fe ff ff 4c 89 ff 44 89 04 24 e8 03 46 f6 e5 44 8b 04 24 41 83 f8 01 0f 84 21 fe ff ff e9 4c fd ff ff 0f 0b e9 af f8 ff ff <0f> 0b e9 5c f8 ff ff 48 89 df e8 da 9e ee e3 e9 12 fd ff ff 4c 89
[ 1968.511923] RSP: 0018:ffffc900024efbf0 EFLAGS: 00010286
[ 1968.511969] RAX: 00000000ffffffff RBX: ffff88811d241250 RCX: ffffffffc0176922
[ 1968.512014] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888118a90a24
[ 1968.512059] RBP: ffff888118a90800 R08: 0000000000000000 R09: ffff888118a90a27
[ 1968.512102] R10: ffffed1023152144 R11: 0000000000000001 R12: ffff888118a908ac
[ 1968.512229] R13: ffff888118a90928 R14: dffffc0000000000 R15: ffff888118a90a24
[ 1968.512310] FS:  0000000000000000(0000) GS:ffff888234200000(0000) knlGS:0000000000000000
[ 1968.512405] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1968.512493] CR2: 00007f5538f443a8 CR3: 000000016dc28001 CR4: 00000000003706e0
[ 1968.512587] Call Trace:
[ 1968.512672]  <TASK>
[ 1968.512751]  ? _raw_spin_unlock_irq+0x1f/0x40
[ 1968.512859]  mhi_pm_st_worker+0x3ac/0x790 [mhi]
[ 1968.512959]  ? mhi_pm_mission_mode_transition.isra.0+0x7d0/0x7d0 [mhi]
[ 1968.513063]  process_one_work+0x86a/0x1400
[ 1968.513184]  ? pwq_dec_nr_in_flight+0x230/0x230
[ 1968.513312]  ? move_linked_works+0x125/0x290
[ 1968.513416]  worker_thread+0x6db/0xf60
[ 1968.513536]  ? process_one_work+0x1400/0x1400
[ 1968.513627]  kthread+0x241/0x2d0
[ 1968.513733]  ? kthread_complete_and_exit+0x20/0x20
[ 1968.513821]  ret_from_fork+0x22/0x30
[ 1968.513924]  </TASK>

Reason is mhi_deassert_dev_wake() from mhi_device_put() is called
but mhi_assert_dev_wake() from __mhi_device_get_sync() is not called
in progress of recovery. Commit 8e0559921f9a ("bus: mhi: core:
Skip device wake in error or shutdown state") add check for the
pm_state of mhi in __mhi_device_get_sync(), and the pm_state is not
the normal state untill recovery is completed, so it leads the
dev_wake is not 0 and above warning print in mhi_pm_disable_transition()
while checking mhi_cntrl->dev_wake.

Add check in ath11k_pci_write32()/ath11k_pci_read32() to skip call
mhi_device_put() if mhi_device_get_sync() does not really do wake,
then the warning gone.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03003-QCAHSPSWPL_V1_V2_SILICONZ_LITE-2

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220228064606.8981-5-quic_wgong@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/ath/ath11k/pci.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 903758751c99..8a3ff12057e8 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -191,6 +191,7 @@ void ath11k_pci_write32(struct ath11k_base *ab, u32 offset, u32 value)
 {
 	struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
 	u32 window_start;
+	int ret = 0;
 
 	/* for offset beyond BAR + 4K - 32, may
 	 * need to wakeup MHI to access.
@@ -198,7 +199,7 @@ void ath11k_pci_write32(struct ath11k_base *ab, u32 offset, u32 value)
 	if (ab->hw_params.wakeup_mhi &&
 	    test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
 	    offset >= ACCESS_ALWAYS_OFF)
-		mhi_device_get_sync(ab_pci->mhi_ctrl->mhi_dev);
+		ret = mhi_device_get_sync(ab_pci->mhi_ctrl->mhi_dev);
 
 	if (offset < WINDOW_START) {
 		iowrite32(value, ab->mem  + offset);
@@ -222,7 +223,8 @@ void ath11k_pci_write32(struct ath11k_base *ab, u32 offset, u32 value)
 
 	if (ab->hw_params.wakeup_mhi &&
 	    test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
-	    offset >= ACCESS_ALWAYS_OFF)
+	    offset >= ACCESS_ALWAYS_OFF &&
+	    !ret)
 		mhi_device_put(ab_pci->mhi_ctrl->mhi_dev);
 }
 
@@ -230,6 +232,7 @@ u32 ath11k_pci_read32(struct ath11k_base *ab, u32 offset)
 {
 	struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
 	u32 val, window_start;
+	int ret = 0;
 
 	/* for offset beyond BAR + 4K - 32, may
 	 * need to wakeup MHI to access.
@@ -237,7 +240,7 @@ u32 ath11k_pci_read32(struct ath11k_base *ab, u32 offset)
 	if (ab->hw_params.wakeup_mhi &&
 	    test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
 	    offset >= ACCESS_ALWAYS_OFF)
-		mhi_device_get_sync(ab_pci->mhi_ctrl->mhi_dev);
+		ret = mhi_device_get_sync(ab_pci->mhi_ctrl->mhi_dev);
 
 	if (offset < WINDOW_START) {
 		val = ioread32(ab->mem + offset);
@@ -261,7 +264,8 @@ u32 ath11k_pci_read32(struct ath11k_base *ab, u32 offset)
 
 	if (ab->hw_params.wakeup_mhi &&
 	    test_bit(ATH11K_PCI_FLAG_INIT_DONE, &ab_pci->flags) &&
-	    offset >= ACCESS_ALWAYS_OFF)
+	    offset >= ACCESS_ALWAYS_OFF &&
+	    !ret)
 		mhi_device_put(ab_pci->mhi_ctrl->mhi_dev);
 
 	return val;
-- 
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[PATCH AUTOSEL 5.18 008/159] ath11k: Change max no of active probe SSID and BSSID to fw capability

[Sasha Levin]

From: Karthikeyan Kathirvel <quic_kathirve@quicinc.com>

[ Upstream commit 50dc9ce9f80554a88e33b73c30851acf2be36ed3 ]

The maximum number of SSIDs in a for active probe requests is currently
reported as 16 (WLAN_SCAN_PARAMS_MAX_SSID) when registering the driver.
The scan_req_params structure only has the capacity to hold 10 SSIDs.
This leads to a buffer overflow which can be triggered from
wpa_supplicant in userspace. When copying the SSIDs into the
scan_req_params structure in the ath11k_mac_op_hw_scan route, it can
overwrite the extraie pointer.

Firmware supports 16 ssid * 4 bssid, for each ssid 4 bssid combo probe
request will be sent, so totally 64 probe requests supported. So
set both max ssid and bssid to 16 and 4 respectively. Remove the
redundant macros of ssid and bssid.

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.7.0.1-01300-QCAHKSWPL_SILICONZ-1

Signed-off-by: Karthikeyan Kathirvel <quic_kathirve@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220329150221.21907-1-quic_kathirve@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/ath/ath11k/wmi.h | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/wmi.h b/drivers/net/wireless/ath/ath11k/wmi.h
index 587f42307250..b5b72483477d 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.h
+++ b/drivers/net/wireless/ath/ath11k/wmi.h
@@ -3088,9 +3088,6 @@ enum scan_dwelltime_adaptive_mode {
 	SCAN_DWELL_MODE_STATIC = 4
 };
 
-#define WLAN_SCAN_MAX_NUM_SSID          10
-#define WLAN_SCAN_MAX_NUM_BSSID         10
-
 #define WLAN_SSID_MAX_LEN 32
 
 struct element_info {
@@ -3105,7 +3102,6 @@ struct wlan_ssid {
 
 #define WMI_IE_BITMAP_SIZE             8
 
-#define WMI_SCAN_MAX_NUM_SSID                0x0A
 /* prefix used by scan requestor ids on the host */
 #define WMI_HOST_SCAN_REQUESTOR_ID_PREFIX 0xA000
 
@@ -3113,10 +3109,6 @@ struct wlan_ssid {
 /* host cycles through the lower 12 bits to generate ids */
 #define WMI_HOST_SCAN_REQ_ID_PREFIX 0xA000
 
-#define WLAN_SCAN_PARAMS_MAX_SSID    16
-#define WLAN_SCAN_PARAMS_MAX_BSSID   4
-#define WLAN_SCAN_PARAMS_MAX_IE_LEN  256
-
 /* Values lower than this may be refused by some firmware revisions with a scan
  * completion with a timedout reason.
  */
@@ -3312,8 +3304,8 @@ struct scan_req_params {
 	u32 n_probes;
 	u32 *chan_list;
 	u32 notify_scan_events;
-	struct wlan_ssid ssid[WLAN_SCAN_MAX_NUM_SSID];
-	struct wmi_mac_addr bssid_list[WLAN_SCAN_MAX_NUM_BSSID];
+	struct wlan_ssid ssid[WLAN_SCAN_PARAMS_MAX_SSID];
+	struct wmi_mac_addr bssid_list[WLAN_SCAN_PARAMS_MAX_BSSID];
 	struct element_info extraie;
 	struct element_info htcap;
 	struct element_info vhtcap;
-- 
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[PATCH AUTOSEL 5.18 062/159] ath11k: disable spectral scan during spectral deinit

[Sasha Levin]

From: Hari Chandrakanthan <quic_haric@quicinc.com>

[ Upstream commit 161c64de239c7018e0295e7e0520a19f00aa32dc ]

When ath11k modules are removed using rmmod with spectral scan enabled,
crash is observed. Different crash trace is observed for each crash.

Send spectral scan disable WMI command to firmware before cleaning
the spectral dbring in the spectral_deinit API to avoid this crash.

call trace from one of the crash observed:
[ 1252.880802] Unable to handle kernel NULL pointer dereference at virtual address 00000008
[ 1252.882722] pgd = 0f42e886
[ 1252.890955] [00000008] *pgd=00000000
[ 1252.893478] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[ 1253.093035] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.89 #0
[ 1253.115261] Hardware name: Generic DT based system
[ 1253.121149] PC is at ath11k_spectral_process_data+0x434/0x574 [ath11k]
[ 1253.125940] LR is at 0x88e31017
[ 1253.132448] pc : [<7f9387b8>]    lr : [<88e31017>]    psr: a0000193
[ 1253.135488] sp : 80d01bc8  ip : 00000001  fp : 970e0000
[ 1253.141737] r10: 88e31000  r9 : 970ec000  r8 : 00000080
[ 1253.146946] r7 : 94734040  r6 : a0000113  r5 : 00000057  r4 : 00000000
[ 1253.152159] r3 : e18cb694  r2 : 00000217  r1 : 1df1f000  r0 : 00000001
[ 1253.158755] Flags: NzCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment user
[ 1253.165266] Control: 10c0383d  Table: 5e71006a  DAC: 00000055
[ 1253.172472] Process swapper/0 (pid: 0, stack limit = 0x60870141)
[ 1253.458055] [<7f9387b8>] (ath11k_spectral_process_data [ath11k]) from [<7f917fdc>] (ath11k_dbring_buffer_release_event+0x214/0x2e4 [ath11k])
[ 1253.466139] [<7f917fdc>] (ath11k_dbring_buffer_release_event [ath11k]) from [<7f8ea3c4>] (ath11k_wmi_tlv_op_rx+0x1840/0x29cc [ath11k])
[ 1253.478807] [<7f8ea3c4>] (ath11k_wmi_tlv_op_rx [ath11k]) from [<7f8fe868>] (ath11k_htc_rx_completion_handler+0x180/0x4e0 [ath11k])
[ 1253.490699] [<7f8fe868>] (ath11k_htc_rx_completion_handler [ath11k]) from [<7f91308c>] (ath11k_ce_per_engine_service+0x2c4/0x3b4 [ath11k])
[ 1253.502386] [<7f91308c>] (ath11k_ce_per_engine_service [ath11k]) from [<7f9a4198>] (ath11k_pci_ce_tasklet+0x28/0x80 [ath11k_pci])
[ 1253.514811] [<7f9a4198>] (ath11k_pci_ce_tasklet [ath11k_pci]) from [<8032227c>] (tasklet_action_common.constprop.2+0x64/0xe8)
[ 1253.526476] [<8032227c>] (tasklet_action_common.constprop.2) from [<803021e8>] (__do_softirq+0x130/0x2d0)
[ 1253.537756] [<803021e8>] (__do_softirq) from [<80322610>] (irq_exit+0xcc/0xe8)
[ 1253.547304] [<80322610>] (irq_exit) from [<8036a4a4>] (__handle_domain_irq+0x60/0xb4)
[ 1253.554428] [<8036a4a4>] (__handle_domain_irq) from [<805eb348>] (gic_handle_irq+0x4c/0x90)
[ 1253.562321] [<805eb348>] (gic_handle_irq) from [<80301a78>] (__irq_svc+0x58/0x8c)

Tested-on: QCN6122 hw1.0 AHB WLAN.HK.2.6.0.1-00851-QCAHKSWPL_SILICONZ-1

Signed-off-by: Hari Chandrakanthan <quic_haric@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/1649396345-349-1-git-send-email-quic_haric@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/ath/ath11k/spectral.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/spectral.c b/drivers/net/wireless/ath/ath11k/spectral.c
index 2b18871d5f7c..516a7b4cd180 100644
--- a/drivers/net/wireless/ath/ath11k/spectral.c
+++ b/drivers/net/wireless/ath/ath11k/spectral.c
@@ -212,7 +212,10 @@ static int ath11k_spectral_scan_config(struct ath11k *ar,
 		return -ENODEV;
 
 	arvif->spectral_enabled = (mode != ATH11K_SPECTRAL_DISABLED);
+
+	spin_lock_bh(&ar->spectral.lock);
 	ar->spectral.mode = mode;
+	spin_unlock_bh(&ar->spectral.lock);
 
 	ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
 					      ATH11K_WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
@@ -843,9 +846,6 @@ static inline void ath11k_spectral_ring_free(struct ath11k *ar)
 {
 	struct ath11k_spectral *sp = &ar->spectral;
 
-	if (!sp->enabled)
-		return;
-
 	ath11k_dbring_srng_cleanup(ar, &sp->rx_ring);
 	ath11k_dbring_buf_cleanup(ar, &sp->rx_ring);
 }
@@ -897,15 +897,16 @@ void ath11k_spectral_deinit(struct ath11k_base *ab)
 		if (!sp->enabled)
 			continue;
 
-		ath11k_spectral_debug_unregister(ar);
-		ath11k_spectral_ring_free(ar);
+		mutex_lock(&ar->conf_mutex);
+		ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_DISABLED);
+		mutex_unlock(&ar->conf_mutex);
 
 		spin_lock_bh(&sp->lock);
-
-		sp->mode = ATH11K_SPECTRAL_DISABLED;
 		sp->enabled = false;
-
 		spin_unlock_bh(&sp->lock);
+
+		ath11k_spectral_debug_unregister(ar);
+		ath11k_spectral_ring_free(ar);
 	}
 }
 
-- 
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[PATCH AUTOSEL 5.18 073/159] ath11k: fix warning of not found station for bssid in message

[Sasha Levin]

From: Wen Gong <quic_wgong@quicinc.com>

[ Upstream commit 7330e1ec9748948177830c6e1a13379835d577f9 ]

When test connect/disconnect to an AP frequently with WCN6855, sometimes
it show below log.

[  277.040121] wls1: deauthenticating from 8c:21:0a:b3:5a:64 by local choice (Reason: 3=DEAUTH_LEAVING)
[  277.050906] ath11k_pci 0000:05:00.0: wmi stats vdev id 0 mac 00:03:7f:29:61:11
[  277.050944] ath11k_pci 0000:05:00.0: wmi stats bssid 8c:21:0a:b3:5a:64 vif         pK-error
[  277.050954] ath11k_pci 0000:05:00.0: not found station for bssid 8c:21:0a:b3:5a:64
[  277.050961] ath11k_pci 0000:05:00.0: failed to parse rssi chain -71
[  277.050967] ath11k_pci 0000:05:00.0: failed to pull fw stats: -71
[  277.050976] ath11k_pci 0000:05:00.0: wmi stats vdev id 0 mac 00:03:7f:29:61:11
[  277.050983] ath11k_pci 0000:05:00.0: wmi stats bssid 8c:21:0a:b3:5a:64 vif         pK-error
[  277.050989] ath11k_pci 0000:05:00.0: not found station for bssid 8c:21:0a:b3:5a:64
[  277.050995] ath11k_pci 0000:05:00.0: failed to parse rssi chain -71
[  277.051000] ath11k_pci 0000:05:00.0: failed to pull fw stats: -71
[  278.064050] ath11k_pci 0000:05:00.0: failed to request fw stats: -110

Reason is:
When running disconnect operation, sta_info removed from local->sta_hash
by __sta_info_destroy_part1() from __sta_info_flush(), after this,
ieee80211_find_sta_by_ifaddr() which called by
ath11k_wmi_tlv_fw_stats_data_parse() and ath11k_wmi_tlv_rssi_chain_parse()
cannot find this station, then failed log printed.

steps are like this:
1. when disconnect from AP, __sta_info_destroy() called __sta_info_destroy_part1()
and __sta_info_destroy_part2().

2. in __sta_info_destroy_part1(),  it has "sta_info_hash_del(local, sta)"
and "list_del_rcu(&sta->list)", it will remove the ieee80211_sta from the
list of ieee80211_hw.

3. in __sta_info_destroy_part2(), it called drv_sta_state()->ath11k_mac_op_sta_state(),
then peer->sta is clear at this moment.

4. in __sta_info_destroy_part2(), it then called sta_set_sinfo()->drv_sta_statistics()
->ath11k_mac_op_sta_statistics(), then WMI_REQUEST_STATS_CMDID sent to firmware.

5. WMI_UPDATE_STATS_EVENTID reported from firmware, at this moment, the
ieee80211_sta can not be found again because it has remove from list in
step2 and also peer->sta is clear in step3.

6. in __sta_info_destroy_part2(), it then called cleanup_single_sta()->
sta_info_free()->kfree(sta), at this moment, the ieee80211_sta is freed
in memory, then the failed log will not happen because function
ath11k_mac_op_sta_state() will not be called.

Actually this print log is not a real error, it is only to skip parse the
info, so change to skip print by default debug setting.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220428022426.2927-1-quic_wgong@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/ath/ath11k/wmi.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/wmi.c b/drivers/net/wireless/ath/ath11k/wmi.c
index 2751fe8814df..0900f75eef20 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -5789,9 +5789,9 @@ static int ath11k_wmi_tlv_rssi_chain_parse(struct ath11k_base *ab,
 					   arvif->bssid,
 					   NULL);
 	if (!sta) {
-		ath11k_warn(ab, "not found station for bssid %pM\n",
-			    arvif->bssid);
-		ret = -EPROTO;
+		ath11k_dbg(ab, ATH11K_DBG_WMI,
+			   "not found station of bssid %pM for rssi chain\n",
+			   arvif->bssid);
 		goto exit;
 	}
 
@@ -5889,8 +5889,9 @@ static int ath11k_wmi_tlv_fw_stats_data_parse(struct ath11k_base *ab,
 					   "wmi stats vdev id %d snr %d\n",
 					   src->vdev_id, src->beacon_snr);
 			} else {
-				ath11k_warn(ab, "not found station for bssid %pM\n",
-					    arvif->bssid);
+				ath11k_dbg(ab, ATH11K_DBG_WMI,
+					   "not found station of bssid %pM for vdev stat\n",
+					   arvif->bssid);
 			}
 		}
 
-- 
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