unwrap initialization of queues to avoid false positive lockdep warning: [ 27.350258] ============================================ [ 27.350267] WARNING: possible recursive locking detected [ 27.350276] 5.14.0-rc6+ #16 Tainted: G C OE [ 27.350288] -------------------------------------------- [ 27.350295] RTW_CMD_THREAD/679 is trying to acquire lock: [ 27.350306] ffffa846c03290c8 (&(pqueue->lock)){+.-.}-{2:2}, at: rtw_alloc_network+0x1b/0xa0 [r8723bs] [ 27.350441] but task is already holding lock: [ 27.350448] ffffa846c0329118 (&(pqueue->lock)){+.-.}-{2:2}, at: rtw_update_scanned_network+0x33/0x1d0 [r8723bs] [ 27.350573] other info that might help us debug this: [ 27.350581] Possible unsafe locking scenario: [ 27.350588] CPU0 [ 27.350594] ---- [ 27.350600] lock(&(pqueue->lock)); [ 27.350614] lock(&(pqueue->lock)); [ 27.350627] *** DEADLOCK *** [ 27.350634] May be due to missing lock nesting notation [ 27.350641] 2 locks held by RTW_CMD_THREAD/679: [ 27.350652] #0: ffffa846c0329038 (&pmlmepriv->lock){+...}-{2:2}, at: rtw_survey_event_callback+0x2d/0xe0 [r8723bs] [ 27.350780] #1: ffffa846c0329118 (&(pqueue->lock)){+.-.}-{2:2}, at: rtw_update_scanned_network+0x33/0x1d0 [r8723bs] [ 27.350907] stack backtrace: [ 27.350916] CPU: 3 PID: 679 Comm: RTW_CMD_THREAD Tainted: G C OE 5.14.0-rc6+ #16 [ 27.350933] Hardware name: LENOVO 80NR/Madrid, BIOS DACN25WW 08/20/2015 [ 27.350943] Call Trace: [ 27.350959] dump_stack_lvl+0x56/0x6f [ 27.350982] __lock_acquire.cold.79+0x137/0x298 [ 27.351012] lock_acquire+0xb4/0x2c0 [ 27.351031] ? rtw_alloc_network+0x1b/0xa0 [r8723bs] [ 27.351140] ? rtw_update_scanned_network+0x33/0x1d0 [r8723bs] [ 27.351254] _raw_spin_lock_bh+0x34/0x40 [ 27.351271] ? rtw_alloc_network+0x1b/0xa0 [r8723bs] [ 27.351378] rtw_alloc_network+0x1b/0xa0 [r8723bs] [ 27.351488] rtw_update_scanned_network+0xa5/0x1d0 [r8723bs] [ 27.351605] rtw_survey_event_callback+0x54/0xe0 [r8723bs] [ 27.351719] mlme_evt_hdl+0x4e/0x70 [r8723bs] [ 27.351839] rtw_cmd_thread+0x16c/0x3d0 [r8723bs] [ 27.351945] ? rtw_stop_cmd_thread+0x50/0x50 [r8723bs] [ 27.352045] kthread+0x136/0x160 [ 27.352064] ? set_kthread_struct+0x40/0x40 [ 27.352083] ret_from_fork+0x22/0x30 This happens because the wrapping function _rtw_init_queues() bring lockdep considering all queues as a single one. But all queues are different with their own lock. Applied the following semantic patch: @@ expression a; @@ - _rtw_init_queue(&a); + INIT_LIST_HEAD(&a.queue); + spin_lock_init(&a.lock); Reported-by: Hans De Goede <hdegoede@xxxxxxxxxx> Signed-off-by: Fabio Aiuto <fabioaiuto83@xxxxxxxxx> --- drivers/staging/rtl8723bs/core/rtw_ap.c | 3 +- drivers/staging/rtl8723bs/core/rtw_cmd.c | 3 +- drivers/staging/rtl8723bs/core/rtw_mlme.c | 6 ++-- drivers/staging/rtl8723bs/core/rtw_recv.c | 12 ++++--- drivers/staging/rtl8723bs/core/rtw_sta_mgt.c | 15 ++++++--- drivers/staging/rtl8723bs/core/rtw_xmit.c | 33 ++++++++++++------- .../staging/rtl8723bs/hal/rtl8723bs_recv.c | 6 ++-- 7 files changed, 52 insertions(+), 26 deletions(-) diff --git a/drivers/staging/rtl8723bs/core/rtw_ap.c b/drivers/staging/rtl8723bs/core/rtw_ap.c index 6064dd6a76b4..79fbf14287b1 100644 --- a/drivers/staging/rtl8723bs/core/rtw_ap.c +++ b/drivers/staging/rtl8723bs/core/rtw_ap.c @@ -18,7 +18,8 @@ void init_mlme_ap_info(struct adapter *padapter) spin_lock_init(&pmlmepriv->bcn_update_lock); /* for ACL */ - _rtw_init_queue(&pacl_list->acl_node_q); + INIT_LIST_HEAD(&pacl_list->acl_node_q.queue); + spin_lock_init(&pacl_list->acl_node_q.lock); /* pmlmeext->bstart_bss = false; */ diff --git a/drivers/staging/rtl8723bs/core/rtw_cmd.c b/drivers/staging/rtl8723bs/core/rtw_cmd.c index d494c06dab96..76418c525b5c 100644 --- a/drivers/staging/rtl8723bs/core/rtw_cmd.c +++ b/drivers/staging/rtl8723bs/core/rtw_cmd.c @@ -166,7 +166,8 @@ int rtw_init_cmd_priv(struct cmd_priv *pcmdpriv) init_completion(&pcmdpriv->cmd_queue_comp); init_completion(&pcmdpriv->terminate_cmdthread_comp); - _rtw_init_queue(&(pcmdpriv->cmd_queue)); + INIT_LIST_HEAD(&(pcmdpriv->cmd_queue).queue); + spin_lock_init(&(pcmdpriv->cmd_queue).lock); /* allocate DMA-able/Non-Page memory for cmd_buf and rsp_buf */ diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c index ab6a24d70cc9..d4650ef3dbe8 100644 --- a/drivers/staging/rtl8723bs/core/rtw_mlme.c +++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c @@ -27,8 +27,10 @@ int rtw_init_mlme_priv(struct adapter *padapter) pmlmepriv->scan_mode = SCAN_ACTIVE;/* 1: active, 0: pasive. Maybe someday we should rename this varable to "active_mode" (Jeff) */ spin_lock_init(&pmlmepriv->lock); - _rtw_init_queue(&pmlmepriv->free_bss_pool); - _rtw_init_queue(&pmlmepriv->scanned_queue); + INIT_LIST_HEAD(&pmlmepriv->free_bss_pool.queue); + spin_lock_init(&pmlmepriv->free_bss_pool.lock); + INIT_LIST_HEAD(&pmlmepriv->scanned_queue.queue); + spin_lock_init(&pmlmepriv->scanned_queue.lock); set_scanned_network_val(pmlmepriv, 0); diff --git a/drivers/staging/rtl8723bs/core/rtw_recv.c b/drivers/staging/rtl8723bs/core/rtw_recv.c index 5b0a596eefb7..105fe0e3482a 100644 --- a/drivers/staging/rtl8723bs/core/rtw_recv.c +++ b/drivers/staging/rtl8723bs/core/rtw_recv.c @@ -25,7 +25,8 @@ void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv) /* for (i = 0; i<MAX_RX_NUMBLKS; i++) */ /* _rtw_init_queue(&psta_recvpriv->blk_strms[i]); */ - _rtw_init_queue(&psta_recvpriv->defrag_q); + INIT_LIST_HEAD(&psta_recvpriv->defrag_q.queue); + spin_lock_init(&psta_recvpriv->defrag_q.lock); } signed int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter) @@ -36,9 +37,12 @@ signed int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *pada spin_lock_init(&precvpriv->lock); - _rtw_init_queue(&precvpriv->free_recv_queue); - _rtw_init_queue(&precvpriv->recv_pending_queue); - _rtw_init_queue(&precvpriv->uc_swdec_pending_queue); + INIT_LIST_HEAD(&precvpriv->free_recv_queue.queue); + spin_lock_init(&precvpriv->free_recv_queue.lock); + INIT_LIST_HEAD(&precvpriv->recv_pending_queue.queue); + spin_lock_init(&precvpriv->recv_pending_queue.lock); + INIT_LIST_HEAD(&precvpriv->uc_swdec_pending_queue.queue); + spin_lock_init(&precvpriv->uc_swdec_pending_queue.lock); precvpriv->adapter = padapter; diff --git a/drivers/staging/rtl8723bs/core/rtw_sta_mgt.c b/drivers/staging/rtl8723bs/core/rtw_sta_mgt.c index 67ca219f95bf..bf090f3b1db6 100644 --- a/drivers/staging/rtl8723bs/core/rtw_sta_mgt.c +++ b/drivers/staging/rtl8723bs/core/rtw_sta_mgt.c @@ -19,7 +19,8 @@ void _rtw_init_stainfo(struct sta_info *psta) /* INIT_LIST_HEAD(&psta->sleep_list); */ /* INIT_LIST_HEAD(&psta->wakeup_list); */ - _rtw_init_queue(&psta->sleep_q); + INIT_LIST_HEAD(&psta->sleep_q.queue); + spin_lock_init(&psta->sleep_q.lock); psta->sleepq_len = 0; _rtw_init_sta_xmit_priv(&psta->sta_xmitpriv); @@ -62,14 +63,17 @@ u32 _rtw_init_sta_priv(struct sta_priv *pstapriv) pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 - ((SIZE_PTR)(pstapriv->pallocated_stainfo_buf) & 3); - _rtw_init_queue(&pstapriv->free_sta_queue); + INIT_LIST_HEAD(&pstapriv->free_sta_queue.queue); + spin_lock_init(&pstapriv->free_sta_queue.lock); spin_lock_init(&pstapriv->sta_hash_lock); /* _rtw_init_queue(&pstapriv->asoc_q); */ pstapriv->asoc_sta_count = 0; - _rtw_init_queue(&pstapriv->sleep_q); - _rtw_init_queue(&pstapriv->wakeup_q); + INIT_LIST_HEAD(&pstapriv->sleep_q.queue); + spin_lock_init(&pstapriv->sleep_q.lock); + INIT_LIST_HEAD(&pstapriv->wakeup_q.queue); + spin_lock_init(&pstapriv->wakeup_q.lock); psta = (struct sta_info *)(pstapriv->pstainfo_buf); @@ -242,7 +246,8 @@ struct sta_info *rtw_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr) /* preorder_ctrl->wsize_b = (NR_RECVBUFF-2); */ preorder_ctrl->wsize_b = 64;/* 64; */ - _rtw_init_queue(&preorder_ctrl->pending_recvframe_queue); + INIT_LIST_HEAD(&preorder_ctrl->pending_recvframe_queue.queue); + spin_lock_init(&preorder_ctrl->pending_recvframe_queue.lock); rtw_init_recv_timer(preorder_ctrl); } diff --git a/drivers/staging/rtl8723bs/core/rtw_xmit.c b/drivers/staging/rtl8723bs/core/rtw_xmit.c index 79e4d7df1ef5..3eb6db2f26bb 100644 --- a/drivers/staging/rtl8723bs/core/rtw_xmit.c +++ b/drivers/staging/rtl8723bs/core/rtw_xmit.c @@ -13,7 +13,8 @@ static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 }; static void _init_txservq(struct tx_servq *ptxservq) { INIT_LIST_HEAD(&ptxservq->tx_pending); - _rtw_init_queue(&ptxservq->sta_pending); + INIT_LIST_HEAD(&ptxservq->sta_pending.queue); + spin_lock_init(&ptxservq->sta_pending.lock); ptxservq->qcnt = 0; } @@ -49,13 +50,19 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter) pxmitpriv->adapter = padapter; - _rtw_init_queue(&pxmitpriv->be_pending); - _rtw_init_queue(&pxmitpriv->bk_pending); - _rtw_init_queue(&pxmitpriv->vi_pending); - _rtw_init_queue(&pxmitpriv->vo_pending); - _rtw_init_queue(&pxmitpriv->bm_pending); + INIT_LIST_HEAD(&pxmitpriv->be_pending.queue); + spin_lock_init(&pxmitpriv->be_pending.lock); + INIT_LIST_HEAD(&pxmitpriv->bk_pending.queue); + spin_lock_init(&pxmitpriv->bk_pending.lock); + INIT_LIST_HEAD(&pxmitpriv->vi_pending.queue); + spin_lock_init(&pxmitpriv->vi_pending.lock); + INIT_LIST_HEAD(&pxmitpriv->vo_pending.queue); + spin_lock_init(&pxmitpriv->vo_pending.lock); + INIT_LIST_HEAD(&pxmitpriv->bm_pending.queue); + spin_lock_init(&pxmitpriv->bm_pending.lock); - _rtw_init_queue(&pxmitpriv->free_xmit_queue); + INIT_LIST_HEAD(&pxmitpriv->free_xmit_queue.queue); + spin_lock_init(&pxmitpriv->free_xmit_queue.lock); /* * Please allocate memory with the sz = (struct xmit_frame) * NR_XMITFRAME, @@ -96,8 +103,10 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter) pxmitpriv->frag_len = MAX_FRAG_THRESHOLD; /* init xmit_buf */ - _rtw_init_queue(&pxmitpriv->free_xmitbuf_queue); - _rtw_init_queue(&pxmitpriv->pending_xmitbuf_queue); + INIT_LIST_HEAD(&pxmitpriv->free_xmitbuf_queue.queue); + spin_lock_init(&pxmitpriv->free_xmitbuf_queue.lock); + INIT_LIST_HEAD(&pxmitpriv->pending_xmitbuf_queue.queue); + spin_lock_init(&pxmitpriv->pending_xmitbuf_queue.lock); pxmitpriv->pallocated_xmitbuf = vzalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4); @@ -145,7 +154,8 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter) pxmitpriv->free_xmitbuf_cnt = NR_XMITBUFF; /* init xframe_ext queue, the same count as extbuf */ - _rtw_init_queue(&pxmitpriv->free_xframe_ext_queue); + INIT_LIST_HEAD(&pxmitpriv->free_xframe_ext_queue.queue); + spin_lock_init(&pxmitpriv->free_xframe_ext_queue.lock); pxmitpriv->xframe_ext_alloc_addr = vzalloc(NR_XMIT_EXTBUFF * sizeof(struct xmit_frame) + 4); @@ -178,7 +188,8 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter) pxmitpriv->free_xframe_ext_cnt = NR_XMIT_EXTBUFF; /* Init xmit extension buff */ - _rtw_init_queue(&pxmitpriv->free_xmit_extbuf_queue); + INIT_LIST_HEAD(&pxmitpriv->free_xmit_extbuf_queue.queue); + spin_lock_init(&pxmitpriv->free_xmit_extbuf_queue.lock); pxmitpriv->pallocated_xmit_extbuf = vzalloc(NR_XMIT_EXTBUFF * sizeof(struct xmit_buf) + 4); diff --git a/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c b/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c index 418016930728..c0a1a6fbeb91 100644 --- a/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c +++ b/drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c @@ -378,8 +378,10 @@ s32 rtl8723bs_init_recv_priv(struct adapter *padapter) precvpriv = &padapter->recvpriv; /* 3 1. init recv buffer */ - _rtw_init_queue(&precvpriv->free_recv_buf_queue); - _rtw_init_queue(&precvpriv->recv_buf_pending_queue); + INIT_LIST_HEAD(&precvpriv->free_recv_buf_queue.queue); + spin_lock_init(&precvpriv->free_recv_buf_queue.lock); + INIT_LIST_HEAD(&precvpriv->recv_buf_pending_queue.queue); + spin_lock_init(&precvpriv->recv_buf_pending_queue.lock); n = NR_RECVBUFF * sizeof(struct recv_buf) + 4; precvpriv->pallocated_recv_buf = rtw_zmalloc(n); -- 2.20.1