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>

1 files changed, 4 insertions, 1 deletions

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);