From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Subject: [PATCH 2/6] net: calxedaxgmac: remove explicit rx dma buffer polling Date: Fri, 12 Oct 2012 10:15:04 -0500 Message-ID: <1350054908-30646-3-git-send-email-robherring2@gmail.com> References: <1350054908-30646-1-git-send-email-robherring2@gmail.com> Cc: jonathan@jonmasters.org, eric.dumazet@gmail.com, Mark Langsdorf , Rob Herring To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org Return-path: In-Reply-To: <1350054908-30646-1-git-send-email-robherring2@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Rob Herring New received frames will trigger the rx DMA to poll the DMA descriptors, so there is no need to tell the h/w to poll. We also want to enable dropping frames from the fifo when there is no buffer. Signed-off-by: Rob Herring --- drivers/net/ethernet/calxeda/xgmac.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c index 7f5fd17..728fcef 100644 --- a/drivers/net/ethernet/calxeda/xgmac.c +++ b/drivers/net/ethernet/calxeda/xgmac.c @@ -966,7 +966,7 @@ static int xgmac_hw_init(struct net_device *dev) ctrl |= XGMAC_CONTROL_IPC; writel(ctrl, ioaddr + XGMAC_CONTROL); - writel(DMA_CONTROL_DFF | DMA_CONTROL_OSF, ioaddr + XGMAC_DMA_CONTROL); + writel(DMA_CONTROL_OSF, ioaddr + XGMAC_DMA_CONTROL); /* Set the HW DMA mode and the COE */ writel(XGMAC_OMR_TSF | XGMAC_OMR_RFD | XGMAC_OMR_RFA | @@ -1180,8 +1180,6 @@ static int xgmac_rx(struct xgmac_priv *priv, int limit) xgmac_rx_refill(priv); - writel(1, priv->base + XGMAC_DMA_RX_POLL); - return count; } -- 1.7.9.5