netdev - [PATCH] stmmac ethernet: remove cut & paste code

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Message-ID: <20161124110548.GB30723@amd>
Date:   Thu, 24 Nov 2016 12:05:48 +0100
From:   Pavel Machek <pavel@....cz>
To:     peppe.cavallaro@...com, netdev@...r.kernel.org,
        kernel list <linux-kernel@...r.kernel.org>,
        ezequiel@...guardiasur.com.ar, sonic.zhang@...log.com,
        fabrice.gasnier@...com
Subject: [PATCH] stmmac ethernet: remove cut & paste code


Remove duplicate code from _tx routines.
    
Signed-off-by: Pavel Machek <pavel@...x.de>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 1cff258..5cf9cef 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1960,6 +1960,38 @@ static void stmmac_tso_allocator(struct stmmac_priv *priv, unsigned int des,
 	}
 }
 
+static void stmmac_xmit_common(struct sk_buff *skb, struct net_device *dev, int nfrags, struct dma_desc *desc)
+{
+	struct stmmac_priv *priv = netdev_priv(dev);
+
+	if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) {
+		if (netif_msg_hw(priv))
+			pr_debug("%s: stop transmitted packets\n", __func__);
+		netif_stop_queue(dev);
+	}
+
+	dev->stats.tx_bytes += skb->len;
+
+	/* According to the coalesce parameter the IC bit for the latest
+	 * segment is reset and the timer re-started to clean the tx status.
+	 * This approach takes care about the fragments: desc is the first
+	 * element in case of no SG.
+	 */
+	priv->tx_count_frames += nfrags + 1;
+	if (likely(priv->tx_coal_frames > priv->tx_count_frames)) {
+		mod_timer(&priv->txtimer,
+			  STMMAC_COAL_TIMER(priv->tx_coal_timer));
+	} else {
+		priv->tx_count_frames = 0;
+		priv->hw->desc->set_tx_ic(desc);
+		priv->xstats.tx_set_ic_bit++;
+	}
+
+	if (!priv->hwts_tx_en)
+		skb_tx_timestamp(skb);
+}
+
+
 /**
  *  stmmac_tso_xmit - Tx entry point of the driver for oversized frames (TSO)
  *  @skb : the socket buffer
@@ -2081,30 +2113,11 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	priv->cur_tx = STMMAC_GET_ENTRY(priv->cur_tx, DMA_TX_SIZE);
 
-	if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) {
-		if (netif_msg_hw(priv))
-			pr_debug("%s: stop transmitted packets\n", __func__);
-		netif_stop_queue(dev);
-	}
-
-	dev->stats.tx_bytes += skb->len;
+	stmmac_xmit_common(skb, dev, nfrags, desc);
+	
 	priv->xstats.tx_tso_frames++;
 	priv->xstats.tx_tso_nfrags += nfrags;
 
-	/* Manage tx mitigation */
-	priv->tx_count_frames += nfrags + 1;
-	if (likely(priv->tx_coal_frames > priv->tx_count_frames)) {
-		mod_timer(&priv->txtimer,
-			  STMMAC_COAL_TIMER(priv->tx_coal_timer));
-	} else {
-		priv->tx_count_frames = 0;
-		priv->hw->desc->set_tx_ic(desc);
-		priv->xstats.tx_set_ic_bit++;
-	}
-
-	if (!priv->hwts_tx_en)
-		skb_tx_timestamp(skb);
-
 	if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
 		     priv->hwts_tx_en)) {
 		/* declare that device is doing timestamping */
@@ -2280,31 +2293,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
 		print_pkt(skb->data, skb->len);
 	}
 
-	if (unlikely(stmmac_tx_avail(priv) <= (MAX_SKB_FRAGS + 1))) {
-		if (netif_msg_hw(priv))
-			pr_debug("%s: stop transmitted packets\n", __func__);
-		netif_stop_queue(dev);
-	}
-
-	dev->stats.tx_bytes += skb->len;
-
-	/* According to the coalesce parameter the IC bit for the latest
-	 * segment is reset and the timer re-started to clean the tx status.
-	 * This approach takes care about the fragments: desc is the first
-	 * element in case of no SG.
-	 */
-	priv->tx_count_frames += nfrags + 1;
-	if (likely(priv->tx_coal_frames > priv->tx_count_frames)) {
-		mod_timer(&priv->txtimer,
-			  STMMAC_COAL_TIMER(priv->tx_coal_timer));
-	} else {
-		priv->tx_count_frames = 0;
-		priv->hw->desc->set_tx_ic(desc);
-		priv->xstats.tx_set_ic_bit++;
-	}
-
-	if (!priv->hwts_tx_en)
-		skb_tx_timestamp(skb);
+	stmmac_xmit_common(skb, dev, nfrags, desc);
 
 	/* Ready to fill the first descriptor and set the OWN bit w/o any
 	 * problems because all the descriptors are actually ready to be


-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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