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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>
This commit is contained in:
Andrea Merello 2014-04-04 18:25:51 +02:00 committed by John W. Linville
parent 6bcb20c776
commit 294bc611ab
1 changed files with 4 additions and 1 deletions
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5
drivers/net/wireless/rtl818x/rtl8180/dev.c
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@ -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);