linux-kernel - [PATCH 4.4 27/43] rtlwifi: rtl8723be: Fix loss of signal

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180327162717.940562599@linuxfoundation.org>
Date:   Tue, 27 Mar 2018 18:27:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Larry Finger <Larry.Finger@...inger.net>,
        James Cameron <quozl@...top.org>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 4.4 27/43] rtlwifi: rtl8723be: Fix loss of signal

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Larry Finger <Larry.Finger@...inger.net>

commit 78dc897b7ee67205423dbbc6b56be49fb18d15b5 upstream.

In commit c713fb071edc ("rtlwifi: rtl8821ae: Fix connection lost problem
correctly") a problem in rtl8821ae that caused loss of signal was fixed.
That same problem has now been reported for rtl8723be. Accordingly,
the ASPM L1 latency has been increased from 0 to 7 to fix the instability.

Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
Cc: Stable <stable@...r.kernel.org>
Tested-by: James Cameron <quozl@...top.org>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/realtek/rtlwifi/rtl8723be/hw.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/hw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/hw.c
@@ -1123,7 +1123,8 @@ static void _rtl8723be_enable_aspm_back_
 
 	/* Configuration Space offset 0x70f BIT7 is used to control L0S */
 	tmp8 = _rtl8723be_dbi_read(rtlpriv, 0x70f);
-	_rtl8723be_dbi_write(rtlpriv, 0x70f, tmp8 | BIT(7));
+	_rtl8723be_dbi_write(rtlpriv, 0x70f, tmp8 | BIT(7) |
+			     ASPM_L1_LATENCY << 3);
 
 	/* Configuration Space offset 0x719 Bit3 is for L1
 	 * BIT4 is for clock request