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From: Kang Yang <quic_kangyang@quicinc.com>
To: <ath12k@lists.infradead.org>
CC: <linux-wireless@vger.kernel.org>, <quic_kangyang@quicinc.com>
Subject: [PATCH v5 08/11] wifi: ath12k: fix incorrect logic of calculating vdev_stats_id
Date: Mon, 29 Jan 2024 18:14:50 +0800
Message-ID: <20240129101453.368494-9-quic_kangyang@quicinc.com>
In-Reply-To: <20240129101453.368494-1-quic_kangyang@quicinc.com>
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During calculate vdev_stats_id, will compare vdev_stats_id with
ATH12K_INVAL_VDEV_STATS_ID by '<='. If vdev_stats_id is relatively
small, then assign ATH12K_INVAL_VDEV_STATS_ID to vdev_stats_id.

This logic is incorrect. Firstly, should use '>=' instead of '<=' to
check if this u8 variable exceeds the max valid range.

Secondly, should use the maximum value as comparison value.

Correct comparison symbols and use the maximum value
ATH12K_MAX_VDEV_STATS_ID for comparison.

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: Kang Yang <quic_kangyang@quicinc.com>
---

v5: 
    1. rewrite commit log. 
    2. move position.
v4: new patch.

---
 drivers/net/wireless/ath/ath12k/mac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index 4ad23bc9381c..1377b710bdcb 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -5473,7 +5473,7 @@ ath12k_mac_get_vdev_stats_id(struct ath12k_vif *arvif)
 	do {
 		if (ab->free_vdev_stats_id_map & (1LL << vdev_stats_id)) {
 			vdev_stats_id++;
-			if (vdev_stats_id <= ATH12K_INVAL_VDEV_STATS_ID) {
+			if (vdev_stats_id >= ATH12K_MAX_VDEV_STATS_ID) {
 				vdev_stats_id = ATH12K_INVAL_VDEV_STATS_ID;
 				break;
 			}
-- 
2.34.1