linux-kernel - [PATCH] rtlwifi: rtl892cu: Set limit for pwdb

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Message-ID: <20250402071040.3155-1-vulab@iscas.ac.cn>
Date: Wed,  2 Apr 2025 15:10:40 +0800
From: Wentao Liang <vulab@...as.ac.cn>
To: pkshih@...ltek.com,
	kvalo@...nel.org
Cc: linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Wentao Liang <vulab@...as.ac.cn>,
	stable@...r.kernel.org
Subject: [PATCH] rtlwifi: rtl892cu: Set limit for pwdb_all

In _rtl92c_query_rxphystatus(), the return rtl_query_rxpwrpercentage()
need to be checked. A proper implementation can be found in
_rtl8723be_query_rxphystatus(). Add a value check and set the limit of
pwdb_add as 100.

Fixes: 666e8457fae4 ("rtlwifi: rtl8192cu: Add routine mac")
Cc: stable@...r.kernel.org # v2.6+
Signed-off-by: Wentao Liang <vulab@...as.ac.cn>
---
 drivers/net/wireless/realtek/rtlwifi/rtl8192cu/mac.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/mac.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/mac.c
index a76f2dc8a977..e2145f284ec0 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/mac.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192cu/mac.c
@@ -641,6 +641,9 @@ static void _rtl92c_query_rxphystatus(struct ieee80211_hw *hw,
 			}
 		}
 		pwdb_all = rtl_query_rxpwrpercentage(rx_pwr_all);
+		if (pwdb_all > 100)
+			pwdb_all = 100;
+
 		pstats->rx_pwdb_all = pwdb_all;
 		pstats->recvsignalpower = rx_pwr_all;
 		if (packet_match_bssid) {
-- 
2.42.0.windows.2