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Subject[PATCH 4.15 068/105] rtlwifi: rtl8723be: Fix loss of signal
Date
4.15-stable review patch.  If anyone has any objections, please let me know.

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

From: Larry Finger <Larry.Finger@lwfinger.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@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Tested-by: James Cameron <quozl@laptop.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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
@@ -1124,7 +1124,8 @@ 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

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