netdev - [PATCH v3 4/6] net: calxedaxgmac: drop some unnecessary register writes

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Date:	Mon,  5 Nov 2012 10:22:22 -0600
From:	Rob Herring <robherring2@...il.com>
To:	netdev@...r.kernel.org, davem@...emloft.net
Cc:	eric.dumazet@...il.com, Rob Herring <rob.herring@...xeda.com>
Subject: [PATCH v3 4/6] net: calxedaxgmac: drop some unnecessary register writes

From: Rob Herring <rob.herring@...xeda.com>

The interrupts have already been cleared, so we don't need to clear them
again. Also, we could miss interrupts if they are cleared, but we don't
process the packet.

Signed-off-by: Rob Herring <rob.herring@...xeda.com>
---
 drivers/net/ethernet/calxeda/xgmac.c |    6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c
index 84cd40e..8263219 100644
--- a/drivers/net/ethernet/calxeda/xgmac.c
+++ b/drivers/net/ethernet/calxeda/xgmac.c
@@ -846,9 +846,6 @@ static void xgmac_free_dma_desc_rings(struct xgmac_priv *priv)
 static void xgmac_tx_complete(struct xgmac_priv *priv)
 {
 	int i;
-	void __iomem *ioaddr = priv->base;
-
-	writel(DMA_STATUS_TU | DMA_STATUS_NIS, ioaddr + XGMAC_DMA_STATUS);
 
 	while (dma_ring_cnt(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ)) {
 		unsigned int entry = priv->tx_tail;
@@ -1139,9 +1136,6 @@ static int xgmac_rx(struct xgmac_priv *priv, int limit)
 		struct sk_buff *skb;
 		int frame_len;
 
-		writel(DMA_STATUS_RI | DMA_STATUS_NIS,
-		       priv->base + XGMAC_DMA_STATUS);
-
 		entry = priv->rx_tail;
 		p = priv->dma_rx + entry;
 		if (desc_get_owner(p))
-- 
1.7.10.4

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