linux-kernel - [PATCH AUTOSEL 5.16 059/217] ath11k: Fix mon status ring rx tlv processing

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Date:   Mon, 17 Jan 2022 21:17:02 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Anilkumar Kolli <akolli@...eaurora.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        Sasha Levin <sashal@...nel.org>, kvalo@...nel.org,
        davem@...emloft.net, kuba@...nel.org, ath11k@...ts.infradead.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.16 059/217] ath11k: Fix mon status ring rx tlv processing

From: Anilkumar Kolli <akolli@...eaurora.org>

[ Upstream commit 09f16f7390f302937409738d6cb6ce99b265f455 ]

In HE monitor capture, HAL_TLV_STATUS_PPDU_DONE is received
on processing multiple skb. Do not clear the ppdu_info
till the HAL_TLV_STATUS_PPDU_DONE is received.

This fixes below warning and packet drops in monitor mode.
 "Rate marked as an HE rate but data is invalid: MCS: 6, NSS: 0"
 WARNING: at
 PC is at ieee80211_rx_napi+0x624/0x840 [mac80211]

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01693-QCAHKSWPL_SILICONZ-1

Signed-off-by: Anilkumar Kolli <akolli@...eaurora.org>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Link: https://lore.kernel.org/r/1637249433-10316-1-git-send-email-akolli@codeaurora.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/ath/ath11k/dp_rx.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
index c5320847b80a7..f7968aefaabc5 100644
--- a/drivers/net/wireless/ath/ath11k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
@@ -3064,10 +3064,10 @@ int ath11k_dp_rx_process_mon_status(struct ath11k_base *ab, int mac_id,
 	if (!num_buffs_reaped)
 		goto exit;
 
-	while ((skb = __skb_dequeue(&skb_list))) {
-		memset(&ppdu_info, 0, sizeof(ppdu_info));
-		ppdu_info.peer_id = HAL_INVALID_PEERID;
+	memset(&ppdu_info, 0, sizeof(ppdu_info));
+	ppdu_info.peer_id = HAL_INVALID_PEERID;
 
+	while ((skb = __skb_dequeue(&skb_list))) {
 		if (ath11k_debugfs_is_pktlog_lite_mode_enabled(ar)) {
 			log_type = ATH11K_PKTLOG_TYPE_LITE_RX;
 			rx_buf_sz = DP_RX_BUFFER_SIZE_LITE;
@@ -3095,10 +3095,7 @@ int ath11k_dp_rx_process_mon_status(struct ath11k_base *ab, int mac_id,
 			ath11k_dbg(ab, ATH11K_DBG_DATA,
 				   "failed to find the peer with peer_id %d\n",
 				   ppdu_info.peer_id);
-			spin_unlock_bh(&ab->base_lock);
-			rcu_read_unlock();
-			dev_kfree_skb_any(skb);
-			continue;
+			goto next_skb;
 		}
 
 		arsta = (struct ath11k_sta *)peer->sta->drv_priv;
@@ -3107,10 +3104,13 @@ int ath11k_dp_rx_process_mon_status(struct ath11k_base *ab, int mac_id,
 		if (ath11k_debugfs_is_pktlog_peer_valid(ar, peer->addr))
 			trace_ath11k_htt_rxdesc(ar, skb->data, log_type, rx_buf_sz);
 
+next_skb:
 		spin_unlock_bh(&ab->base_lock);
 		rcu_read_unlock();
 
 		dev_kfree_skb_any(skb);
+		memset(&ppdu_info, 0, sizeof(ppdu_info));
+		ppdu_info.peer_id = HAL_INVALID_PEERID;
 	}
 exit:
 	return num_buffs_reaped;
-- 
2.34.1