From: Deren Wu <Deren.Wu@mediatek.com>
To: Felix Fietkau <nbd@nbd.name>,
Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Cc: Sean Wang <sean.wang@mediatek.com>,
Soul Huang <Soul.Huang@mediatek.com>,
YN Chen <YN.Chen@mediatek.com>, Leon Yen <Leon.Yen@mediatek.com>,
Eric-SY Chang <Eric-SY.Chang@mediatek.com>,
Deren Wu <Deren.Wu@mediatek.com>, KM Lin <km.lin@mediatek.com>,
Robin Chiu <robin.chiu@mediatek.com>,
CH Yeh <ch.yeh@mediatek.com>, Posh Sun <posh.sun@mediatek.com>,
Eric Liang <Eric.Liang@mediatek.com>,
Stella Chang <Stella.Chang@mediatek.com>,
Jimmy Hu <Jimmy.Hu@mediatek.com>, <jemele@google.com>,
<yenlinlai@google.com>,
linux-wireless <linux-wireless@vger.kernel.org>,
linux-mediatek <linux-mediatek@lists.infradead.org>,
Deren Wu <deren.wu@mediatek.com>
Subject: [PATCH] mt76: mt7921: Fix out of order process by invalid event pkt
Date: Wed, 14 Jul 2021 23:50:52 +0800 [thread overview]
Message-ID: <36a686fd5ffcbe13dfd26cff7436dbb88a294dd2.1626248054.git.deren.wu@mediatek.com> (raw)
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
reply other threads:[~2021-07-14 15:51 UTC|newest]
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