[PATCH ath-current 6/7] wifi: ath12k: Fix flush cache failure during RX queue update

Nithyanantham Paramasivam
2025-08-06T11:18:12Z

Flush cache failures were observed after RX queue update for TID
delete. This occurred because the queue was invalid during flush.
Set the VLD bit in the RX queue update command for TID delete.
This ensures the queue remains valid during the flush cache process.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices")
Signed-off-by: Nithyanantham Paramasivam <nithyanantham.paramasivam@oss.qualcomm.com>
---
drivers/net/wireless/ath/ath12k/dp_rx.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/ath/ath12k/dp_rx.c b/drivers/net/wireless/ath/ath12k/dp_rx.c
index 9a62ef52cd6d..9cdb7cb03e23 100644
--- a/drivers/net/wireless/ath/ath12k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath12k/dp_rx.c
@@ -850,6 +850,8 @@ static int ath12k_dp_rx_tid_delete_handler(struct ath12k_base *ab,
cmd.addr_lo = lower_32_bits(rx_tid->qbuf.paddr_aligned);
cmd.addr_hi = upper_32_bits(rx_tid->qbuf.paddr_aligned);
cmd.upd0 |= HAL_REO_CMD_UPD0_VLD;
+ /* Observed flush cache failure, to avoid that set vld bit during delete */
+ cmd.upd1 |= HAL_REO_CMD_UPD1_VLD;

return ath12k_dp_reo_cmd_send(ab, rx_tid,
HAL_REO_CMD_UPDATE_RX_QUEUE, &cmd,
--
2.17.1