linux-kernel - [PATCH 3.16 072/305] rtlwifi: Fix logic error in enter/exit power-save mode

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Date:	Sat, 13 Aug 2016 18:42:51 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "wang yanqing" <udknight@...il.com>,
	"Kalle Valo" <kvalo@...eaurora.org>,
	"Larry Finger" <Larry.Finger@...inger.net>
Subject: [PATCH 3.16 072/305] rtlwifi: Fix logic error in enter/exit
 power-save mode

3.16.37-rc1 review patch.  If anyone has any objections, please let me know.

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

From: wang yanqing <udknight@...il.com>

commit 873ffe154ae074c46ed2d72dbd9a2a99f06f55b4 upstream.

In commit a269913c52ad ("rtlwifi: Rework rtl_lps_leave() and
rtl_lps_enter() to use work queue"), the tests for enter/exit
power-save mode were inverted. With this change applied, the
wifi connection becomes much more stable.

Fixes: a269913c52ad ("rtlwifi: Rework rtl_lps_leave() and rtl_lps_enter() to use work queue")
Signed-off-by: Wang YanQing <udknight@...il.com>
Acked-by: Larry Finger <Larry.Finger@...inger.net>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
[bwh: Backported to 3.16:
 - We only set a flag here to be used later, but it was also set the wrong way
 - Adjust filename]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/wireless/rtlwifi/base.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/wireless/rtlwifi/base.c
+++ b/drivers/net/wireless/rtlwifi/base.c
@@ -1401,9 +1401,9 @@ void rtl_watchdog_wq_callback(void *data
 		if (((rtlpriv->link_info.num_rx_inperiod +
 		      rtlpriv->link_info.num_tx_inperiod) > 8) ||
 		    (rtlpriv->link_info.num_rx_inperiod > 2))
-			rtlpriv->enter_ps = true;
-		else
 			rtlpriv->enter_ps = false;
+		else
+			rtlpriv->enter_ps = true;
 
 		/* LeisurePS only work in infra mode. */
 		schedule_work(&rtlpriv->works.lps_change_work);