From patchwork Fri Apr 7 03:31:02 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Herrenschmidt X-Patchwork-Id: 748032 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3vzlVm4FLNz9s1h for ; Fri, 7 Apr 2017 13:31:44 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753754AbdDGDbm (ORCPT ); Thu, 6 Apr 2017 23:31:42 -0400 Received: from gate.crashing.org ([63.228.1.57]:39159 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753520AbdDGDbf (ORCPT ); Thu, 6 Apr 2017 23:31:35 -0400 Received: from pasglop.ozlabs.ibm.com (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.13.8) with ESMTP id v373V9Cq007254; Thu, 6 Apr 2017 22:31:23 -0500 From: Benjamin Herrenschmidt To: netdev@vger.kernel.org Cc: Benjamin Herrenschmidt Subject: [PATCH 09/12] ftgmac100: Split tx packet freeing from ftgmac100_tx_complete_packet() Date: Fri, 7 Apr 2017 13:31:02 +1000 Message-Id: <20170407033105.29558-10-benh@kernel.crashing.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170407033105.29558-1-benh@kernel.crashing.org> References: <20170407033105.29558-1-benh@kernel.crashing.org> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This moves the packet freeing to a separate function which is also used by ftgmac100_free_buffers() and will be used more in the error path of fragmented sends. Signed-off-by: Benjamin Herrenschmidt --- drivers/net/ethernet/faraday/ftgmac100.c | 38 ++++++++++++++++++-------------- 1 file changed, 21 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 31fbb75..22edd01 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -561,13 +561,29 @@ static bool ftgmac100_tx_buf_cleanable(struct ftgmac100 *priv) return priv->tx_pointer != priv->tx_clean_pointer; } +static void ftgmac100_free_tx_packet(struct ftgmac100 *priv, + unsigned int pointer, + struct sk_buff *skb, + struct ftgmac100_txdes *txdes) +{ + dma_addr_t map; + + map = ftgmac100_txdes_get_dma_addr(txdes); + + dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE); + + dev_kfree_skb(skb); + priv->tx_skbs[pointer] = NULL; + + ftgmac100_txdes_reset(priv, txdes); +} + static bool ftgmac100_tx_complete_packet(struct ftgmac100 *priv) { struct net_device *netdev = priv->netdev; struct ftgmac100_txdes *txdes; - unsigned int pointer; struct sk_buff *skb; - dma_addr_t map; + unsigned int pointer; pointer = priv->tx_clean_pointer; txdes = &priv->descs->txdes[pointer]; @@ -576,17 +592,9 @@ static bool ftgmac100_tx_complete_packet(struct ftgmac100 *priv) return false; skb = priv->tx_skbs[pointer]; - map = ftgmac100_txdes_get_dma_addr(txdes); - netdev->stats.tx_packets++; netdev->stats.tx_bytes += skb->len; - - dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE); - - dev_kfree_skb(skb); - priv->tx_skbs[pointer] = NULL; - - ftgmac100_txdes_reset(priv, txdes); + ftgmac100_free_tx_packet(priv, pointer, skb, txdes); priv->tx_clean_pointer = ftgmac100_next_tx_pointer(pointer); @@ -728,13 +736,9 @@ static void ftgmac100_free_buffers(struct ftgmac100 *priv) for (i = 0; i < TX_QUEUE_ENTRIES; i++) { struct ftgmac100_txdes *txdes = &priv->descs->txdes[i]; struct sk_buff *skb = priv->tx_skbs[i]; - dma_addr_t map = ftgmac100_txdes_get_dma_addr(txdes); - - if (!skb) - continue; - dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE); - kfree_skb(skb); + if (skb) + ftgmac100_free_tx_packet(priv, i, skb, txdes); } }