From patchwork Fri Oct 12 15:15:06 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [4/6] net: calxedaxgmac: drop some unnecessary register writes Date: Fri, 12 Oct 2012 05:15:06 -0000 From: Rob Herring X-Patchwork-Id: 191147 Message-Id: <1350054908-30646-5-git-send-email-robherring2@gmail.com> To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org Cc: jonathan@jonmasters.org, eric.dumazet@gmail.com, Mark Langsdorf , Rob Herring From: Rob Herring 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 --- 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 117839e..4a1a06a 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))