6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zong-Zhe Yang kevin_yang@realtek.com
[ Upstream commit e47f0a5898540eb19b953708707887d4b3020645 ]
When starting/proceeding MCC, it will abort an ongoing hw scan process. In the proceeding cases, it unexpectedly tries to abort a non-exist hw scan process. Then, a trace shown at the bottom will happen. This problem is caused by a previous commit which changed some call sequence inside rtw89_hw_scan_complete() to fix some coex problems. These changes lead to our scanning flag was not cleared when proceeding MCC. To keep the fixes on coex, and resolve the problem here, re-consider the related call sequence.
The known sequence requirements are listed below.
* the old sequence: A. notify coex B. clear scanning flag C. proceed chanctx C-1. set channel C-2. proceed MCC (the problem: A needs to be after C-1)
* the current sequence: C. proceed chanctx C-1. set channel C-2. proceed MCC A. notify coex B. clear scanning flag (the problem: C-2 needs to be after B)
So, now let hw scan caller pass a callback to proceed chanctx if needed. Then, the new sequence will be like the below. C-1. set channel A. notify coex B. clear scanning flag C-2. proceed MCC
The following is the kernel log for the problem in current sequence.
rtw89_8852be 0000:04:00.0: rtw89_hw_scan_offload failed ret -110 ------------[ cut here ]------------ [...] CPU: 2 PID: 3991 Comm: kworker/u16:0 Tainted: G OE 6.6.17 #3 Hardware name: LENOVO 2356AD1/2356AD1, BIOS G7ETB3WW (2.73 ) 11/28/2018 Workqueue: events_unbound wiphy_work_cancel [cfg80211] RIP: 0010:ieee80211_sched_scan_stopped+0xaea/0xd80 [mac80211] Code: 9c 24 d0 11 00 00 49 39 dd 0f 85 46 ff ff ff 4c 89 e7 e8 09 2d RSP: 0018:ffffb27783643d48 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8a2280964bc0 RSI: 0000000000000000 RDI: ffff8a23df580900 RBP: ffffb27783643d88 R08: 0000000000000001 R09: 0000000000000400 R10: 0000000000000000 R11: 0000000000008268 R12: ffff8a23df580900 R13: ffff8a23df581b00 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8a258e680000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f26a0654000 CR3: 000000002ea2e002 CR4: 00000000001706e0 Call Trace: <TASK> ? show_regs+0x68/0x70 ? ieee80211_sched_scan_stopped+0xaea/0xd80 [mac80211] ? __warn+0x8f/0x150 ? ieee80211_sched_scan_stopped+0xaea/0xd80 [mac80211] ? report_bug+0x1f5/0x200 ? handle_bug+0x46/0x80 ? exc_invalid_op+0x19/0x70 ? asm_exc_invalid_op+0x1b/0x20 ? ieee80211_sched_scan_stopped+0xaea/0xd80 [mac80211] ieee80211_scan_work+0x14a/0x650 [mac80211] ? __queue_work+0x10f/0x410 wiphy_work_cancel+0x2fb/0x310 [cfg80211] process_scheduled_works+0x9d/0x390 ? __pfx_worker_thread+0x10/0x10 worker_thread+0x15b/0x2d0 ? __pfx_worker_thread+0x10/0x10 kthread+0x108/0x140 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x3c/0x60 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 </TASK> ---[ end trace 0000000000000000 ]---
Fixes: f16c40acd319 ("wifi: rtw89: Fix TX fail with A2DP after scanning") Signed-off-by: Zong-Zhe Yang kevin_yang@realtek.com Signed-off-by: Ping-Ke Shih pkshih@realtek.com Link: https://patch.msgid.link/20241231004811.8646-2-pkshih@realtek.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/realtek/rtw89/chan.c | 26 +++++++++++++-- drivers/net/wireless/realtek/rtw89/chan.h | 9 ++++- drivers/net/wireless/realtek/rtw89/core.c | 2 +- drivers/net/wireless/realtek/rtw89/fw.c | 40 +++++++++++++++++++---- 4 files changed, 66 insertions(+), 11 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtw89/chan.c b/drivers/net/wireless/realtek/rtw89/chan.c index fb9449930c40a..abc78716596d0 100644 --- a/drivers/net/wireless/realtek/rtw89/chan.c +++ b/drivers/net/wireless/realtek/rtw89/chan.c @@ -2530,7 +2530,25 @@ void rtw89_chanctx_pause(struct rtw89_dev *rtwdev, hal->entity_pause = true; }
-void rtw89_chanctx_proceed(struct rtw89_dev *rtwdev) +static void rtw89_chanctx_proceed_cb(struct rtw89_dev *rtwdev, + const struct rtw89_chanctx_cb_parm *parm) +{ + int ret; + + if (!parm || !parm->cb) + return; + + ret = parm->cb(rtwdev, parm->data); + if (ret) + rtw89_warn(rtwdev, "%s (%s): cb failed: %d\n", __func__, + parm->caller ?: "unknown", ret); +} + +/* pass @cb_parm if there is a @cb_parm->cb which needs to invoke right after + * call rtw89_set_channel() and right before proceed entity according to mode. + */ +void rtw89_chanctx_proceed(struct rtw89_dev *rtwdev, + const struct rtw89_chanctx_cb_parm *cb_parm) { struct rtw89_hal *hal = &rtwdev->hal; enum rtw89_entity_mode mode; @@ -2538,14 +2556,18 @@ void rtw89_chanctx_proceed(struct rtw89_dev *rtwdev)
lockdep_assert_held(&rtwdev->mutex);
- if (!hal->entity_pause) + if (unlikely(!hal->entity_pause)) { + rtw89_chanctx_proceed_cb(rtwdev, cb_parm); return; + }
rtw89_debug(rtwdev, RTW89_DBG_CHAN, "chanctx proceed\n");
hal->entity_pause = false; rtw89_set_channel(rtwdev);
+ rtw89_chanctx_proceed_cb(rtwdev, cb_parm); + mode = rtw89_get_entity_mode(rtwdev); switch (mode) { case RTW89_ENTITY_MODE_MCC: diff --git a/drivers/net/wireless/realtek/rtw89/chan.h b/drivers/net/wireless/realtek/rtw89/chan.h index 2eb31dff20831..092a6f676894f 100644 --- a/drivers/net/wireless/realtek/rtw89/chan.h +++ b/drivers/net/wireless/realtek/rtw89/chan.h @@ -38,6 +38,12 @@ enum rtw89_chanctx_pause_reasons { RTW89_CHANCTX_PAUSE_REASON_ROC, };
+struct rtw89_chanctx_cb_parm { + int (*cb)(struct rtw89_dev *rtwdev, void *data); + void *data; + const char *caller; +}; + struct rtw89_entity_weight { unsigned int active_chanctxs; unsigned int active_roles; @@ -100,7 +106,8 @@ void rtw89_queue_chanctx_change(struct rtw89_dev *rtwdev, void rtw89_chanctx_track(struct rtw89_dev *rtwdev); void rtw89_chanctx_pause(struct rtw89_dev *rtwdev, enum rtw89_chanctx_pause_reasons rsn); -void rtw89_chanctx_proceed(struct rtw89_dev *rtwdev); +void rtw89_chanctx_proceed(struct rtw89_dev *rtwdev, + const struct rtw89_chanctx_cb_parm *cb_parm);
const struct rtw89_chan *__rtw89_mgnt_chan_get(struct rtw89_dev *rtwdev, const char *caller_message, diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c index d35d066c0b123..f82a26be6fa82 100644 --- a/drivers/net/wireless/realtek/rtw89/core.c +++ b/drivers/net/wireless/realtek/rtw89/core.c @@ -3212,7 +3212,7 @@ void rtw89_roc_end(struct rtw89_dev *rtwdev, struct rtw89_vif *rtwvif)
roc->state = RTW89_ROC_IDLE; rtw89_config_roc_chandef(rtwdev, rtwvif_link->chanctx_idx, NULL); - rtw89_chanctx_proceed(rtwdev); + rtw89_chanctx_proceed(rtwdev, NULL); ret = rtw89_core_send_nullfunc(rtwdev, rtwvif_link, true, false); if (ret) rtw89_debug(rtwdev, RTW89_DBG_TXRX, diff --git a/drivers/net/wireless/realtek/rtw89/fw.c b/drivers/net/wireless/realtek/rtw89/fw.c index e6bceef691e9b..620e076d1b597 100644 --- a/drivers/net/wireless/realtek/rtw89/fw.c +++ b/drivers/net/wireless/realtek/rtw89/fw.c @@ -6637,21 +6637,24 @@ void rtw89_hw_scan_start(struct rtw89_dev *rtwdev, rtw89_chanctx_pause(rtwdev, RTW89_CHANCTX_PAUSE_REASON_HW_SCAN); }
-void rtw89_hw_scan_complete(struct rtw89_dev *rtwdev, - struct rtw89_vif_link *rtwvif_link, - bool aborted) +struct rtw89_hw_scan_complete_cb_data { + struct rtw89_vif_link *rtwvif_link; + bool aborted; +}; + +static int rtw89_hw_scan_complete_cb(struct rtw89_dev *rtwdev, void *data) { const struct rtw89_mac_gen_def *mac = rtwdev->chip->mac_def; struct rtw89_hw_scan_info *scan_info = &rtwdev->scan_info; + struct rtw89_hw_scan_complete_cb_data *cb_data = data; + struct rtw89_vif_link *rtwvif_link = cb_data->rtwvif_link; struct cfg80211_scan_info info = { - .aborted = aborted, + .aborted = cb_data->aborted, }; struct rtw89_vif *rtwvif;
if (!rtwvif_link) - return; - - rtw89_chanctx_proceed(rtwdev); + return -EINVAL;
rtwvif = rtwvif_link->rtwvif;
@@ -6672,6 +6675,29 @@ void rtw89_hw_scan_complete(struct rtw89_dev *rtwdev, scan_info->last_chan_idx = 0; scan_info->scanning_vif = NULL; scan_info->abort = false; + + return 0; +} + +void rtw89_hw_scan_complete(struct rtw89_dev *rtwdev, + struct rtw89_vif_link *rtwvif_link, + bool aborted) +{ + struct rtw89_hw_scan_complete_cb_data cb_data = { + .rtwvif_link = rtwvif_link, + .aborted = aborted, + }; + const struct rtw89_chanctx_cb_parm cb_parm = { + .cb = rtw89_hw_scan_complete_cb, + .data = &cb_data, + .caller = __func__, + }; + + /* The things here needs to be done after setting channel (for coex) + * and before proceeding entity mode (for MCC). So, pass a callback + * of them for the right sequence rather than doing them directly. + */ + rtw89_chanctx_proceed(rtwdev, &cb_parm); }
void rtw89_hw_scan_abort(struct rtw89_dev *rtwdev,