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@vger.kernel.org # v2.6+
Signed-off-by: Wentao Liang <vulab@iscas.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

Wentao Liang <vulab@iscas.ac.cn> wrote:
> 
> 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.

Have you tested on real hardware? Or just guess this is a potential problem?
If that is a real problem, please point out what it happens in commit message.

By the way, subject should be "wifi: rtlwifi: ..."

> 
> Fixes: 666e8457fae4 ("rtlwifi: rtl8192cu: Add routine mac")
> Cc: stable@vger.kernel.org # v2.6+
> Signed-off-by: Wentao Liang <vulab@iscas.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