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From:   Baochen Qiang <quic_bqiang@quicinc.com>
To:     <ath12k@lists.infradead.org>
CC:     <linux-wireless@vger.kernel.org>
Subject: [PATCH] wifi: ath12k: Use msdu_end to check MCBC
Date:   Thu, 27 Apr 2023 09:30:21 +0800
Message-ID: <20230427013021.29792-1-quic_bqiang@quicinc.com>
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We are seeing a very low TCP throughput testing with some specific
tools. This is because for sub-frames of an AMSDU, MCBC flag in
mpdu_start may be not valid, and as a result those frames would be
dropped by kernel.

Change to get it from msdu_end.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
---
 drivers/net/wireless/ath/ath12k/hal.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/hal.c b/drivers/net/wireless/ath/ath12k/hal.c
index 0ec53afe9915..980ec2024b37 100644
--- a/drivers/net/wireless/ath/ath12k/hal.c
+++ b/drivers/net/wireless/ath/ath12k/hal.c
@@ -889,8 +889,8 @@ static u8 *ath12k_hw_wcn7850_rx_desc_mpdu_start_addr2(struct hal_rx_desc *desc)
 
 static bool ath12k_hw_wcn7850_rx_desc_is_mcbc(struct hal_rx_desc *desc)
 {
-	return __le32_to_cpu(desc->u.wcn7850.mpdu_start.info6) &
-	       RX_MPDU_START_INFO6_MCAST_BCAST;
+	return __le32_to_cpu(desc->u.wcn7850.msdu_end.info5) &
+	       RX_MSDU_END_INFO5_DA_IS_MCBC;
 }
 
 static void ath12k_hw_wcn7850_rx_desc_get_dot11_hdr(struct hal_rx_desc *desc,

base-commit: d276b90ff7f9c51e1f2f8826b7cbb3dff20a4b66
-- 
2.25.1