[PATCH AUTOSEL 5.16 157/217] mt76: mt7921: fix network buffer leak by txs missing
Sasha Levin
sashal at kernel.org
Mon Jan 17 18:18:40 PST 2022
From: Deren Wu <deren.wu at mediatek.com>
[ Upstream commit e0bf699ad8e52330d848144a9624a067ad588bd6 ]
TXS in mt7921 may be forwared to tx_done event. Should try to catch
TXS information in tx_done event as well.
Signed-off-by: Deren Wu <deren.wu at mediatek.com>
Signed-off-by: Felix Fietkau <nbd at nbd.name>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
.../net/wireless/mediatek/mt76/mt7921/mac.c | 2 +-
.../net/wireless/mediatek/mt76/mt7921/mcu.c | 14 ++++++++++
.../net/wireless/mediatek/mt76/mt7921/mcu.h | 27 +++++++++++++++++++
.../wireless/mediatek/mt76/mt7921/mt7921.h | 1 +
4 files changed, 43 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
index 27550385c35f9..4df272f93dd47 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -1072,7 +1072,7 @@ mt7921_mac_add_txs_skb(struct mt7921_dev *dev, struct mt76_wcid *wcid, int pid,
return !!skb;
}
-static void mt7921_mac_add_txs(struct mt7921_dev *dev, void *data)
+void mt7921_mac_add_txs(struct mt7921_dev *dev, void *data)
{
struct mt7921_sta *msta = NULL;
struct mt76_wcid *wcid;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
index 6ada1ebe7d68b..46ec9f713d772 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -418,6 +418,17 @@ mt7921_mcu_low_power_event(struct mt7921_dev *dev, struct sk_buff *skb)
trace_lp_event(dev, event->state);
}
+static void
+mt7921_mcu_tx_done_event(struct mt7921_dev *dev, struct sk_buff *skb)
+{
+ struct mt7921_mcu_tx_done_event *event;
+
+ skb_pull(skb, sizeof(struct mt7921_mcu_rxd));
+ event = (struct mt7921_mcu_tx_done_event *)skb->data;
+
+ mt7921_mac_add_txs(dev, event->txs);
+}
+
static void
mt7921_mcu_rx_unsolicited_event(struct mt7921_dev *dev, struct sk_buff *skb)
{
@@ -445,6 +456,9 @@ mt7921_mcu_rx_unsolicited_event(struct mt7921_dev *dev, struct sk_buff *skb)
case MCU_EVENT_LP_INFO:
mt7921_mcu_low_power_event(dev, skb);
break;
+ case MCU_EVENT_TX_DONE:
+ mt7921_mcu_tx_done_event(dev, skb);
+ break;
default:
break;
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.h
index edc0c73f8c01c..68cb0ce013dbd 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.h
@@ -91,6 +91,33 @@ enum {
MCU_EVENT_COREDUMP = 0xf0,
};
+struct mt7921_mcu_tx_done_event {
+ u8 pid;
+ u8 status;
+ __le16 seq;
+
+ u8 wlan_idx;
+ u8 tx_cnt;
+ __le16 tx_rate;
+
+ u8 flag;
+ u8 tid;
+ u8 rsp_rate;
+ u8 mcs;
+
+ u8 bw;
+ u8 tx_pwr;
+ u8 reason;
+ u8 rsv0[1];
+
+ __le32 delay;
+ __le32 timestamp;
+ __le32 applied_flag;
+ u8 txs[28];
+
+ u8 rsv1[32];
+} __packed;
+
/* ext event table */
enum {
MCU_EXT_EVENT_RATE_REPORT = 0x87,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
index e9c7c3a195076..7a6c38fbb940a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
@@ -463,4 +463,5 @@ int mt7921s_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
struct mt76_tx_info *tx_info);
void mt7921s_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e);
bool mt7921s_tx_status_data(struct mt76_dev *mdev, u8 *update);
+void mt7921_mac_add_txs(struct mt7921_dev *dev, void *data);
#endif
--
2.34.1
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