[3.5.y.z extended stable] Patch "rtlwifi: rtl8192cu: Fix incorrect signal strength for unassociated AP" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Fri Nov 29 14:03:14 UTC 2013

This is a note to let you know that I have just added a patch titled

    rtlwifi: rtl8192cu: Fix incorrect signal strength for unassociated AP

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



>From bf0ca468aea33e987b93f7f64359b45b3acc6a5a Mon Sep 17 00:00:00 2001
From: Larry Finger <Larry.Finger at lwfinger.net>
Date: Tue, 5 Nov 2013 15:15:29 -0600
Subject: rtlwifi: rtl8192cu: Fix incorrect signal strength for unassociated AP

commit 78dbfecb95be4635b995af3bd29fa10013409fcd upstream.

The routine that processes received frames was returning the RSSI value for the
signal strength; however, that value is available only for associated APs. As
a result, the strength was the absurd value of 10 dBm. As a result, scans
return incorrect values for the strength, which causes unwanted attempts to roam.

Signed-off-by: Larry Finger <Larry.Finger at lwfinger.net>
Signed-off-by: John W. Linville <linville at tuxdriver.com>
[ luis: backported to 3.5: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 drivers/net/wireless/rtlwifi/rtl8192cu/trx.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c b/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c
index 9adb21a..047e3bc 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c
@@ -349,8 +349,7 @@ bool rtl92cu_rx_query_desc(struct ieee80211_hw *hw,
 	/*rx_status->qual = stats->signal; */
-	rx_status->signal = stats->rssi + 10;
-	/*rx_status->noise = -stats->noise; */
+	rx_status->signal = stats->recvsignalpower + 10;
 	return true;


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