From 294bc611abab43e83bf14d85c493e77ceb364f2e Mon Sep 17 00:00:00 2001
From: Andrea Merello <andrea.merello@gmail.com>
Date: Fri, 4 Apr 2014 18:25:51 +0200
Subject: [PATCH] rtl8180: be paranoid in stopping unused queues.

HW should never attempt to perform DMA for unused queues.
For rtl8187se this is ensured by setting a dedicated register at
init time, before enabling TX.

In rtl8180/5 the register is only written at the first TX (because
in rtl8180/5 it serves also to kick DMA for used queues).
This should be enough, but it's worth to add a register write at
init time, before enabling TX.

Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 drivers/net/wireless/rtl818x/rtl8180/dev.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/rtl818x/rtl8180/dev.c b/drivers/net/wireless/rtl818x/rtl8180/dev.c
index cb8275fe6cda..50d69b13f984 100644
--- a/drivers/net/wireless/rtl818x/rtl8180/dev.c
+++ b/drivers/net/wireless/rtl818x/rtl8180/dev.c
@@ -910,7 +910,10 @@ static int rtl8180_init_hw(struct ieee80211_hw *dev)
 		reg32 &= 0x00ffff00;
 		reg32 |= 0xb8000054;
 		rtl818x_iowrite32(priv, &priv->map->RF_PARA, reg32);
-	}
+	} else
+		/* stop unused queus (no dma alloc) */
+		rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING,
+			    (1<<1) | (1<<2));
 
 	priv->rf->init(dev);
 
-- 
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