* [PATCH] mt76: mt7921: Fix out of order process by invalid event pkt
@ 2021-07-14 15:50 Deren Wu
0 siblings, 0 replies; only message in thread
From: Deren Wu @ 2021-07-14 15:50 UTC (permalink / raw)
To: Felix Fietkau, Lorenzo Bianconi
Cc: Sean Wang, Soul Huang, YN Chen, Leon Yen, Eric-SY Chang,
Deren Wu, KM Lin, Robin Chiu, CH Yeh, Posh Sun, Eric Liang,
Stella Chang, Jimmy Hu, jemele, yenlinlai, linux-wireless,
linux-mediatek, Deren Wu
From: Deren Wu <deren.wu@mediatek.com>
The acceptable event report should inlcude original CMD-ID. Otherwise,
drop unexpected result from fw.
Fixes: 1c099ab44727c ("mt76: mt7921: add MCU support")
Signed-off-by: Jimmy Hu <Jimmy.Hu@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
---
drivers/net/wireless/mediatek/mt76/mt7921/mcu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
index c2c4dc196802..c6dff5473d36 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -157,6 +157,7 @@ mt7921_mcu_parse_response(struct mt76_dev *mdev, int cmd,
struct sk_buff *skb, int seq)
{
struct mt7921_mcu_rxd *rxd;
+ int mcu_cmd = cmd & MCU_CMD_MASK;
int ret = 0;
if (!skb) {
@@ -194,6 +195,9 @@ mt7921_mcu_parse_response(struct mt76_dev *mdev, int cmd,
skb_pull(skb, sizeof(*rxd));
event = (struct mt7921_mcu_uni_event *)skb->data;
ret = le32_to_cpu(event->status);
+ /* skip invalid event */
+ if (mcu_cmd != event->cid)
+ ret = -EAGAIN;
break;
}
case MCU_CMD_REG_READ: {
--
2.25.1
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