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fabioaiutogregkh
fabioaiuto
authored and
gregkh
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staging: rtl8723bs: remove possible deadlock when disconnect (v2)
[ Upstream commit 54659ca ] when turning off a connection, lockdep complains with the following warning (a modprobe has been done but the same happens with a disconnection from NetworkManager, it's enough to trigger a cfg80211_disconnect call): [ 682.855867] ====================================================== [ 682.855877] WARNING: possible circular locking dependency detected [ 682.855887] 5.14.0-rc6+ #16 Tainted: G C OE [ 682.855898] ------------------------------------------------------ [ 682.855906] modprobe/1770 is trying to acquire lock: [ 682.855916] ffffb6d000332b00 (&pxmitpriv->lock){+.-.}-{2:2}, at: rtw_free_stainfo+0x52/0x4a0 [r8723bs] [ 682.856073] but task is already holding lock: [ 682.856081] ffffb6d0003336a8 (&pstapriv->sta_hash_lock){+.-.}-{2:2}, at: rtw_free_assoc_resources+0x48/0x110 [r8723bs] [ 682.856207] which lock already depends on the new lock. [ 682.856215] the existing dependency chain (in reverse order) is: [ 682.856223] -> #1 (&pstapriv->sta_hash_lock){+.-.}-{2:2}: [ 682.856247] _raw_spin_lock_bh+0x34/0x40 [ 682.856265] rtw_get_stainfo+0x9a/0x110 [r8723bs] [ 682.856389] rtw_xmit_classifier+0x27/0x130 [r8723bs] [ 682.856515] rtw_xmitframe_enqueue+0xa/0x20 [r8723bs] [ 682.856642] rtl8723bs_hal_xmit+0x3b/0xb0 [r8723bs] [ 682.856752] rtw_xmit+0x4ef/0x890 [r8723bs] [ 682.856879] _rtw_xmit_entry+0xba/0x350 [r8723bs] [ 682.856981] dev_hard_start_xmit+0xee/0x320 [ 682.856999] sch_direct_xmit+0x8c/0x330 [ 682.857014] __dev_queue_xmit+0xba5/0xf00 [ 682.857030] packet_sendmsg+0x981/0x1b80 [ 682.857047] sock_sendmsg+0x5b/0x60 [ 682.857060] __sys_sendto+0xf1/0x160 [ 682.857073] __x64_sys_sendto+0x24/0x30 [ 682.857087] do_syscall_64+0x3a/0x80 [ 682.857102] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 682.857117] -> #0 (&pxmitpriv->lock){+.-.}-{2:2}: [ 682.857142] __lock_acquire+0xfd9/0x1b50 [ 682.857158] lock_acquire+0xb4/0x2c0 [ 682.857172] _raw_spin_lock_bh+0x34/0x40 [ 682.857185] rtw_free_stainfo+0x52/0x4a0 [r8723bs] [ 682.857308] rtw_free_assoc_resources+0x53/0x110 [r8723bs] [ 682.857415] cfg80211_rtw_disconnect+0x4b/0x70 [r8723bs] [ 682.857522] cfg80211_disconnect+0x12e/0x2f0 [cfg80211] [ 682.857759] cfg80211_leave+0x2b/0x40 [cfg80211] [ 682.857961] cfg80211_netdev_notifier_call+0xa9/0x560 [cfg80211] [ 682.858163] raw_notifier_call_chain+0x41/0x50 [ 682.858180] __dev_close_many+0x62/0x100 [ 682.858195] dev_close_many+0x7d/0x120 [ 682.858209] unregister_netdevice_many+0x416/0x680 [ 682.858225] unregister_netdevice_queue+0xab/0xf0 [ 682.858240] unregister_netdev+0x18/0x20 [ 682.858255] rtw_unregister_netdevs+0x28/0x40 [r8723bs] [ 682.858360] rtw_dev_remove+0x24/0xd0 [r8723bs] [ 682.858463] sdio_bus_remove+0x31/0xd0 [mmc_core] [ 682.858532] device_release_driver_internal+0xf7/0x1d0 [ 682.858550] driver_detach+0x47/0x90 [ 682.858564] bus_remove_driver+0x77/0xd0 [ 682.858579] rtw_drv_halt+0xc/0x678 [r8723bs] [ 682.858685] __x64_sys_delete_module+0x13f/0x250 [ 682.858699] do_syscall_64+0x3a/0x80 [ 682.858715] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 682.858729] other info that might help us debug this: [ 682.858737] Possible unsafe locking scenario: [ 682.858744] CPU0 CPU1 [ 682.858751] ---- ---- [ 682.858758] lock(&pstapriv->sta_hash_lock); [ 682.858772] lock(&pxmitpriv->lock); [ 682.858786] lock(&pstapriv->sta_hash_lock); [ 682.858799] lock(&pxmitpriv->lock); [ 682.858812] *** DEADLOCK *** [ 682.858820] 5 locks held by modprobe/1770: [ 682.858831] #0: ffff8d870697d980 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x1a/0x1d0 [ 682.858869] #1: ffffffffbdbbf1c8 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0xe/0x20 [ 682.858906] #2: ffff8d87054ee5e8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_netdev_notifier_call+0x9e/0x560 [cfg80211] [ 682.859131] #3: ffff8d870f2bc8f0 (&wdev->mtx){+.+.}-{3:3}, at: cfg80211_leave+0x20/0x40 [cfg80211] [ 682.859354] #4: ffffb6d0003336a8 (&pstapriv->sta_hash_lock){+.-.}-{2:2}, at: rtw_free_assoc_resources+0x48/0x110 [r8723bs] [ 682.859482] stack backtrace: [ 682.859491] CPU: 1 PID: 1770 Comm: modprobe Tainted: G C OE 5.14.0-rc6+ #16 [ 682.859507] Hardware name: LENOVO 80NR/Madrid, BIOS DACN25WW 08/20/2015 [ 682.859517] Call Trace: [ 682.859531] dump_stack_lvl+0x56/0x6f [ 682.859551] check_noncircular+0xdb/0xf0 [ 682.859579] __lock_acquire+0xfd9/0x1b50 [ 682.859606] lock_acquire+0xb4/0x2c0 [ 682.859623] ? rtw_free_stainfo+0x52/0x4a0 [r8723bs] [ 682.859752] ? mark_held_locks+0x48/0x70 [ 682.859769] ? rtw_free_stainfo+0x4a/0x4a0 [r8723bs] [ 682.859898] _raw_spin_lock_bh+0x34/0x40 [ 682.859914] ? rtw_free_stainfo+0x52/0x4a0 [r8723bs] [ 682.860039] rtw_free_stainfo+0x52/0x4a0 [r8723bs] [ 682.860171] rtw_free_assoc_resources+0x53/0x110 [r8723bs] [ 682.860286] cfg80211_rtw_disconnect+0x4b/0x70 [r8723bs] [ 682.860397] cfg80211_disconnect+0x12e/0x2f0 [cfg80211] [ 682.860629] cfg80211_leave+0x2b/0x40 [cfg80211] [ 682.860836] cfg80211_netdev_notifier_call+0xa9/0x560 [cfg80211] [ 682.861048] ? __lock_acquire+0x4dc/0x1b50 [ 682.861070] ? lock_is_held_type+0xa8/0x110 [ 682.861089] ? lock_is_held_type+0xa8/0x110 [ 682.861104] ? find_held_lock+0x2d/0x90 [ 682.861120] ? packet_notifier+0x173/0x300 [ 682.861141] ? lock_release+0xb3/0x250 [ 682.861160] ? packet_notifier+0x192/0x300 [ 682.861184] raw_notifier_call_chain+0x41/0x50 [ 682.861205] __dev_close_many+0x62/0x100 [ 682.861224] dev_close_many+0x7d/0x120 [ 682.861245] unregister_netdevice_many+0x416/0x680 [ 682.861264] ? find_held_lock+0x2d/0x90 [ 682.861284] unregister_netdevice_queue+0xab/0xf0 [ 682.861306] unregister_netdev+0x18/0x20 [ 682.861325] rtw_unregister_netdevs+0x28/0x40 [r8723bs] [ 682.861434] rtw_dev_remove+0x24/0xd0 [r8723bs] [ 682.861542] sdio_bus_remove+0x31/0xd0 [mmc_core] [ 682.861615] device_release_driver_internal+0xf7/0x1d0 [ 682.861637] driver_detach+0x47/0x90 [ 682.861656] bus_remove_driver+0x77/0xd0 [ 682.861674] rtw_drv_halt+0xc/0x678 [r8723bs] [ 682.861782] __x64_sys_delete_module+0x13f/0x250 [ 682.861801] ? lockdep_hardirqs_on_prepare+0xf3/0x170 [ 682.861817] ? syscall_enter_from_user_mode+0x20/0x70 [ 682.861836] do_syscall_64+0x3a/0x80 [ 682.861855] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 682.861873] RIP: 0033:0x7f6dbe85400b [ 682.861890] Code: 73 01 c3 48 8b 0d 6d 1e 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 3d 1e 0c 00 f7 d8 64 89 01 48 [ 682.861906] RSP: 002b:00007ffe7a82f538 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 682.861923] RAX: ffffffffffffffda RBX: 000055a64693bd20 RCX: 00007f6dbe85400b [ 682.861935] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055a64693bd88 [ 682.861946] RBP: 000055a64693bd20 R08: 0000000000000000 R09: 0000000000000000 [ 682.861957] R10: 00007f6dbe8c7ac0 R11: 0000000000000206 R12: 000055a64693bd88 [ 682.861967] R13: 0000000000000000 R14: 000055a64693bd88 R15: 00007ffe7a831848 This happens because when we enqueue a frame for transmission we do it under xmit_priv lock, then calling rtw_get_stainfo (needed for enqueuing) takes sta_hash_lock and this leads to the following lock dependency: xmit_priv->lock -> sta_hash_lock Turning off a connection will bring to call rtw_free_assoc_resources which will set up the inverse dependency: sta_hash_lock -> xmit_priv_lock This could lead to a deadlock as lockdep complains. Fix it by removing the xmit_priv->lock around rtw_xmitframe_enqueue call inside rtl8723bs_hal_xmit and put it in a smaller critical section inside rtw_xmit_classifier, the only place where xmit_priv data are actually accessed. Replace spin_{lock,unlock}_bh(pxmitpriv->lock) in other tx paths leading to rtw_xmitframe_enqueue call with spin_{lock,unlock}_bh(psta->sleep_q.lock) - it's not clear why accessing a sleep_q was protected by a spinlock on xmitpriv->lock. This way is avoided the same faulty lock nesting order. Extra changes in v2 by Hans de Goede: -Lift the taking of the struct __queue.lock spinlock out of rtw_free_xmitframe_queue() into the callers this allows also protecting a bunch of related state in rtw_free_stainfo(): -Protect psta->sleepq_len on rtw_free_xmitframe_queue(&psta->sleep_q); -Protect struct tx_servq.tx_pending and tx_servq.qcnt when calling rtw_free_xmitframe_queue(&tx_servq.sta_pending) -This also allows moving the spin_lock_bh(&pxmitpriv->lock); to below the sleep_q free-ing code, avoiding another ABBA locking issue CC: Larry Finger <[email protected]> Co-developed-by: Hans de Goede <[email protected]> Tested-on: Lenovo Ideapad MiiX 300-10IBY Signed-off-by: Fabio Aiuto <[email protected]> Signed-off-by: Hans de Goede <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
1 parent f78e23b commit 353a6e9

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+24
-33
lines changed

5 files changed

+24
-33
lines changed

Diff for: ‎drivers/staging/rtl8723bs/core/rtw_mlme_ext.c

+2-5
Original file line numberDiff line numberDiff line change
@@ -5919,7 +5919,6 @@ u8 chk_bmc_sleepq_hdl(struct adapter *padapter, unsigned char *pbuf)
59195919
struct sta_info *psta_bmc;
59205920
struct list_head *xmitframe_plist, *xmitframe_phead, *tmp;
59215921
struct xmit_frame *pxmitframe = NULL;
5922-
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
59235922
struct sta_priv *pstapriv = &padapter->stapriv;
59245923

59255924
/* for BC/MC Frames */
@@ -5930,8 +5929,7 @@ u8 chk_bmc_sleepq_hdl(struct adapter *padapter, unsigned char *pbuf)
59305929
if ((pstapriv->tim_bitmap&BIT(0)) && (psta_bmc->sleepq_len > 0)) {
59315930
msleep(10);/* 10ms, ATIM(HIQ) Windows */
59325931

5933-
/* spin_lock_bh(&psta_bmc->sleep_q.lock); */
5934-
spin_lock_bh(&pxmitpriv->lock);
5932+
spin_lock_bh(&psta_bmc->sleep_q.lock);
59355933

59365934
xmitframe_phead = get_list_head(&psta_bmc->sleep_q);
59375935
list_for_each_safe(xmitframe_plist, tmp, xmitframe_phead) {
@@ -5954,8 +5952,7 @@ u8 chk_bmc_sleepq_hdl(struct adapter *padapter, unsigned char *pbuf)
59545952
rtw_hal_xmitframe_enqueue(padapter, pxmitframe);
59555953
}
59565954

5957-
/* spin_unlock_bh(&psta_bmc->sleep_q.lock); */
5958-
spin_unlock_bh(&pxmitpriv->lock);
5955+
spin_unlock_bh(&psta_bmc->sleep_q.lock);
59595956

59605957
/* check hi queue and bmc_sleepq */
59615958
rtw_chk_hi_queue_cmd(padapter);

Diff for: ‎drivers/staging/rtl8723bs/core/rtw_recv.c

+3-7
Original file line numberDiff line numberDiff line change
@@ -953,10 +953,8 @@ static signed int validate_recv_ctrl_frame(struct adapter *padapter, union recv_
953953
if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
954954
struct list_head *xmitframe_plist, *xmitframe_phead;
955955
struct xmit_frame *pxmitframe = NULL;
956-
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
957956

958-
/* spin_lock_bh(&psta->sleep_q.lock); */
959-
spin_lock_bh(&pxmitpriv->lock);
957+
spin_lock_bh(&psta->sleep_q.lock);
960958

961959
xmitframe_phead = get_list_head(&psta->sleep_q);
962960
xmitframe_plist = get_next(xmitframe_phead);
@@ -987,12 +985,10 @@ static signed int validate_recv_ctrl_frame(struct adapter *padapter, union recv_
987985
update_beacon(padapter, WLAN_EID_TIM, NULL, true);
988986
}
989987

990-
/* spin_unlock_bh(&psta->sleep_q.lock); */
991-
spin_unlock_bh(&pxmitpriv->lock);
988+
spin_unlock_bh(&psta->sleep_q.lock);
992989

993990
} else {
994-
/* spin_unlock_bh(&psta->sleep_q.lock); */
995-
spin_unlock_bh(&pxmitpriv->lock);
991+
spin_unlock_bh(&psta->sleep_q.lock);
996992

997993
if (pstapriv->tim_bitmap&BIT(psta->aid)) {
998994
if (psta->sleepq_len == 0) {

Diff for: ‎drivers/staging/rtl8723bs/core/rtw_sta_mgt.c

+12-10
Original file line numberDiff line numberDiff line change
@@ -289,46 +289,48 @@ u32 rtw_free_stainfo(struct adapter *padapter, struct sta_info *psta)
289289

290290
/* list_del_init(&psta->wakeup_list); */
291291

292-
spin_lock_bh(&pxmitpriv->lock);
293-
292+
spin_lock_bh(&psta->sleep_q.lock);
294293
rtw_free_xmitframe_queue(pxmitpriv, &psta->sleep_q);
295294
psta->sleepq_len = 0;
295+
spin_unlock_bh(&psta->sleep_q.lock);
296+
297+
spin_lock_bh(&pxmitpriv->lock);
296298

297299
/* vo */
298-
/* spin_lock_bh(&(pxmitpriv->vo_pending.lock)); */
300+
spin_lock_bh(&pstaxmitpriv->vo_q.sta_pending.lock);
299301
rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
300302
list_del_init(&(pstaxmitpriv->vo_q.tx_pending));
301303
phwxmit = pxmitpriv->hwxmits;
302304
phwxmit->accnt -= pstaxmitpriv->vo_q.qcnt;
303305
pstaxmitpriv->vo_q.qcnt = 0;
304-
/* spin_unlock_bh(&(pxmitpriv->vo_pending.lock)); */
306+
spin_unlock_bh(&pstaxmitpriv->vo_q.sta_pending.lock);
305307

306308
/* vi */
307-
/* spin_lock_bh(&(pxmitpriv->vi_pending.lock)); */
309+
spin_lock_bh(&pstaxmitpriv->vi_q.sta_pending.lock);
308310
rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
309311
list_del_init(&(pstaxmitpriv->vi_q.tx_pending));
310312
phwxmit = pxmitpriv->hwxmits+1;
311313
phwxmit->accnt -= pstaxmitpriv->vi_q.qcnt;
312314
pstaxmitpriv->vi_q.qcnt = 0;
313-
/* spin_unlock_bh(&(pxmitpriv->vi_pending.lock)); */
315+
spin_unlock_bh(&pstaxmitpriv->vi_q.sta_pending.lock);
314316

315317
/* be */
316-
/* spin_lock_bh(&(pxmitpriv->be_pending.lock)); */
318+
spin_lock_bh(&pstaxmitpriv->be_q.sta_pending.lock);
317319
rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
318320
list_del_init(&(pstaxmitpriv->be_q.tx_pending));
319321
phwxmit = pxmitpriv->hwxmits+2;
320322
phwxmit->accnt -= pstaxmitpriv->be_q.qcnt;
321323
pstaxmitpriv->be_q.qcnt = 0;
322-
/* spin_unlock_bh(&(pxmitpriv->be_pending.lock)); */
324+
spin_unlock_bh(&pstaxmitpriv->be_q.sta_pending.lock);
323325

324326
/* bk */
325-
/* spin_lock_bh(&(pxmitpriv->bk_pending.lock)); */
327+
spin_lock_bh(&pstaxmitpriv->bk_q.sta_pending.lock);
326328
rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
327329
list_del_init(&(pstaxmitpriv->bk_q.tx_pending));
328330
phwxmit = pxmitpriv->hwxmits+3;
329331
phwxmit->accnt -= pstaxmitpriv->bk_q.qcnt;
330332
pstaxmitpriv->bk_q.qcnt = 0;
331-
/* spin_unlock_bh(&(pxmitpriv->bk_pending.lock)); */
333+
spin_unlock_bh(&pstaxmitpriv->bk_q.sta_pending.lock);
332334

333335
spin_unlock_bh(&pxmitpriv->lock);
334336

Diff for: ‎drivers/staging/rtl8723bs/core/rtw_xmit.c

+7-9
Original file line numberDiff line numberDiff line change
@@ -1723,15 +1723,12 @@ void rtw_free_xmitframe_queue(struct xmit_priv *pxmitpriv, struct __queue *pfram
17231723
struct list_head *plist, *phead, *tmp;
17241724
struct xmit_frame *pxmitframe;
17251725

1726-
spin_lock_bh(&pframequeue->lock);
1727-
17281726
phead = get_list_head(pframequeue);
17291727
list_for_each_safe(plist, tmp, phead) {
17301728
pxmitframe = list_entry(plist, struct xmit_frame, list);
17311729

17321730
rtw_free_xmitframe(pxmitpriv, pxmitframe);
17331731
}
1734-
spin_unlock_bh(&pframequeue->lock);
17351732
}
17361733

17371734
s32 rtw_xmitframe_enqueue(struct adapter *padapter, struct xmit_frame *pxmitframe)
@@ -1786,6 +1783,7 @@ s32 rtw_xmit_classifier(struct adapter *padapter, struct xmit_frame *pxmitframe)
17861783
struct sta_info *psta;
17871784
struct tx_servq *ptxservq;
17881785
struct pkt_attrib *pattrib = &pxmitframe->attrib;
1786+
struct xmit_priv *xmit_priv = &padapter->xmitpriv;
17891787
struct hw_xmit *phwxmits = padapter->xmitpriv.hwxmits;
17901788
signed int res = _SUCCESS;
17911789

@@ -1803,12 +1801,14 @@ s32 rtw_xmit_classifier(struct adapter *padapter, struct xmit_frame *pxmitframe)
18031801

18041802
ptxservq = rtw_get_sta_pending(padapter, psta, pattrib->priority, (u8 *)(&ac_index));
18051803

1804+
spin_lock_bh(&xmit_priv->lock);
18061805
if (list_empty(&ptxservq->tx_pending))
18071806
list_add_tail(&ptxservq->tx_pending, get_list_head(phwxmits[ac_index].sta_queue));
18081807

18091808
list_add_tail(&pxmitframe->list, get_list_head(&ptxservq->sta_pending));
18101809
ptxservq->qcnt++;
18111810
phwxmits[ac_index].accnt++;
1811+
spin_unlock_bh(&xmit_priv->lock);
18121812

18131813
exit:
18141814

@@ -2191,11 +2191,10 @@ void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
21912191
struct list_head *xmitframe_plist, *xmitframe_phead, *tmp;
21922192
struct xmit_frame *pxmitframe = NULL;
21932193
struct sta_priv *pstapriv = &padapter->stapriv;
2194-
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
21952194

21962195
psta_bmc = rtw_get_bcmc_stainfo(padapter);
21972196

2198-
spin_lock_bh(&pxmitpriv->lock);
2197+
spin_lock_bh(&psta->sleep_q.lock);
21992198

22002199
xmitframe_phead = get_list_head(&psta->sleep_q);
22012200
list_for_each_safe(xmitframe_plist, tmp, xmitframe_phead) {
@@ -2296,7 +2295,7 @@ void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
22962295

22972296
_exit:
22982297

2299-
spin_unlock_bh(&pxmitpriv->lock);
2298+
spin_unlock_bh(&psta->sleep_q.lock);
23002299

23012300
if (update_mask)
23022301
update_beacon(padapter, WLAN_EID_TIM, NULL, true);
@@ -2308,9 +2307,8 @@ void xmit_delivery_enabled_frames(struct adapter *padapter, struct sta_info *pst
23082307
struct list_head *xmitframe_plist, *xmitframe_phead, *tmp;
23092308
struct xmit_frame *pxmitframe = NULL;
23102309
struct sta_priv *pstapriv = &padapter->stapriv;
2311-
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
23122310

2313-
spin_lock_bh(&pxmitpriv->lock);
2311+
spin_lock_bh(&psta->sleep_q.lock);
23142312

23152313
xmitframe_phead = get_list_head(&psta->sleep_q);
23162314
list_for_each_safe(xmitframe_plist, tmp, xmitframe_phead) {
@@ -2363,7 +2361,7 @@ void xmit_delivery_enabled_frames(struct adapter *padapter, struct sta_info *pst
23632361
}
23642362
}
23652363

2366-
spin_unlock_bh(&pxmitpriv->lock);
2364+
spin_unlock_bh(&psta->sleep_q.lock);
23672365
}
23682366

23692367
void enqueue_pending_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)

Diff for: ‎drivers/staging/rtl8723bs/hal/rtl8723bs_xmit.c

-2
Original file line numberDiff line numberDiff line change
@@ -507,9 +507,7 @@ s32 rtl8723bs_hal_xmit(
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rtw_issue_addbareq_cmd(padapter, pxmitframe);
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}
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510-
spin_lock_bh(&pxmitpriv->lock);
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err = rtw_xmitframe_enqueue(padapter, pxmitframe);
512-
spin_unlock_bh(&pxmitpriv->lock);
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if (err != _SUCCESS) {
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rtw_free_xmitframe(pxmitpriv, pxmitframe);
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