diff options
| author | Felix Fietkau <nbd@nbd.name> | 2025-08-27 10:53:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-09 19:02:19 +0200 |
| commit | 8fa8eb52bc2eb08d93202863b5fc478e0bebc00c (patch) | |
| tree | 1afc82d219684e50bbc0984b33292ec47c29f854 | |
| parent | 69dcc19048fcdc3fb166fd25b805470ee8fc0eb1 (diff) | |
wifi: mt76: mt7915: fix list corruption after hardware restart
[ Upstream commit 065c79df595af21d6d1b27d642860faa1d938774 ]
Since stations are recreated from scratch, all lists that wcids are added
to must be cleared before calling ieee80211_restart_hw.
Set wcid->sta = 0 for each wcid entry in order to ensure that they are
not added again before they are ready.
Fixes: 8a55712d124f ("wifi: mt76: mt7915: enable full system reset support")
Link: https://patch.msgid.link/20250827085352.51636-4-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mac80211.c | 37 | ||||
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76.h | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 12 |
3 files changed, 43 insertions, 7 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c index 45c8db939d55..4e435bec828b 100644 --- a/drivers/net/wireless/mediatek/mt76/mac80211.c +++ b/drivers/net/wireless/mediatek/mt76/mac80211.c @@ -818,6 +818,43 @@ void mt76_free_device(struct mt76_dev *dev) } EXPORT_SYMBOL_GPL(mt76_free_device); +static void mt76_reset_phy(struct mt76_phy *phy) +{ + if (!phy) + return; + + INIT_LIST_HEAD(&phy->tx_list); +} + +void mt76_reset_device(struct mt76_dev *dev) +{ + int i; + + rcu_read_lock(); + for (i = 0; i < ARRAY_SIZE(dev->wcid); i++) { + struct mt76_wcid *wcid; + + wcid = rcu_dereference(dev->wcid[i]); + if (!wcid) + continue; + + wcid->sta = 0; + mt76_wcid_cleanup(dev, wcid); + rcu_assign_pointer(dev->wcid[i], NULL); + } + rcu_read_unlock(); + + INIT_LIST_HEAD(&dev->wcid_list); + INIT_LIST_HEAD(&dev->sta_poll_list); + dev->vif_mask = 0; + memset(dev->wcid_mask, 0, sizeof(dev->wcid_mask)); + + mt76_reset_phy(&dev->phy); + for (i = 0; i < ARRAY_SIZE(dev->phys); i++) + mt76_reset_phy(dev->phys[i]); +} +EXPORT_SYMBOL_GPL(mt76_reset_device); + struct mt76_phy *mt76_vif_phy(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h index 0ecf77fcbe3d..0290ddbb2424 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76.h +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -1241,6 +1241,7 @@ int mt76_register_device(struct mt76_dev *dev, bool vht, struct ieee80211_rate *rates, int n_rates); void mt76_unregister_device(struct mt76_dev *dev); void mt76_free_device(struct mt76_dev *dev); +void mt76_reset_device(struct mt76_dev *dev); void mt76_unregister_phy(struct mt76_phy *phy); struct mt76_phy *mt76_alloc_radio_phy(struct mt76_dev *dev, unsigned int size, diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c index 6639976afcee..1c0d310146d6 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c @@ -1460,17 +1460,15 @@ mt7915_mac_full_reset(struct mt7915_dev *dev) if (i == 10) dev_err(dev->mt76.dev, "chip full reset failed\n"); - spin_lock_bh(&dev->mt76.sta_poll_lock); - while (!list_empty(&dev->mt76.sta_poll_list)) - list_del_init(dev->mt76.sta_poll_list.next); - spin_unlock_bh(&dev->mt76.sta_poll_lock); - - memset(dev->mt76.wcid_mask, 0, sizeof(dev->mt76.wcid_mask)); - dev->mt76.vif_mask = 0; dev->phy.omac_mask = 0; if (phy2) phy2->omac_mask = 0; + mt76_reset_device(&dev->mt76); + + INIT_LIST_HEAD(&dev->sta_rc_list); + INIT_LIST_HEAD(&dev->twt_list); + i = mt76_wcid_alloc(dev->mt76.wcid_mask, MT7915_WTBL_STA); dev->mt76.global_wcid.idx = i; dev->recovery.hw_full_reset = false; |