Re: [PATCH] Fix for Au1x00 ethernet tx stats

[Sergei Shtylylov <sshtylyov@ru.mvista.com>]

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Hello.

Thomas Lange wrote:
> With current CVS head, ethernet TX bytes always remain zero.
> 
> The problem seems to be that when packet has been transmitted,
> the len word in DMA buffer is zero.
> 
> Attached is a patch against 2_4 HEAD that updates the stats when
> DMA buffer is written to fix this.
> 
> * Patch by Thomas Lange, 21 Jan 2005:
>  Fix update of ethernet tx bytes stats for au1x00

      More than a year ago, this is still an issue with both 2.4 and 2.6 driver.
Here's the 2.6 patch...

> /Thomas

WBR, Sergei

Signed-off-by: Thomas Lange <thomas@corelatus.se>
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>


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diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
index cd0b1dc..a4df316 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -90,7 +90,7 @@ static void au1000_tx_timeout(struct net
 static int au1000_set_config(struct net_device *dev, struct ifmap *map);
 static void set_rx_mode(struct net_device *);
 static struct net_device_stats *au1000_get_stats(struct net_device *);
-static inline void update_tx_stats(struct net_device *, u32, u32);
+static inline void update_tx_stats(struct net_device *, u32);
 static inline void update_rx_stats(struct net_device *, u32);
 static void au1000_timer(unsigned long);
 static int au1000_ioctl(struct net_device *, struct ifreq *, int);
@@ -1827,14 +1827,11 @@ static void __exit au1000_cleanup_module
 
 
 static inline void 
-update_tx_stats(struct net_device *dev, u32 status, u32 pkt_len)
+update_tx_stats(struct net_device *dev, u32 status)
 {
 	struct au1000_private *aup = (struct au1000_private *) dev->priv;
 	struct net_device_stats *ps = &aup->stats;
 
-	ps->tx_packets++;
-	ps->tx_bytes += pkt_len;
-
 	if (status & TX_FRAME_ABORTED) {
 		if (dev->if_port == IF_PORT_100BASEFX) {
 			if (status & (TX_JAB_TIMEOUT | TX_UNDERRUN)) {
@@ -1867,7 +1864,7 @@ static void au1000_tx_ack(struct net_dev
 	ptxd = aup->tx_dma_ring[aup->tx_tail];
 
 	while (ptxd->buff_stat & TX_T_DONE) {
-		update_tx_stats(dev, ptxd->status, ptxd->len & 0x3ff);
+		update_tx_stats(dev, ptxd->status);
 		ptxd->buff_stat &= ~TX_T_DONE;
 		ptxd->len = 0;
 		au_sync();
@@ -1889,6 +1886,7 @@ static void au1000_tx_ack(struct net_dev
 static int au1000_tx(struct sk_buff *skb, struct net_device *dev)
 {
 	struct au1000_private *aup = (struct au1000_private *) dev->priv;
+	struct net_device_stats *ps = &aup->stats;
 	volatile tx_dma_t *ptxd;
 	u32 buff_stat;
 	db_dest_t *pDB;
@@ -1908,7 +1906,7 @@ static int au1000_tx(struct sk_buff *skb
 		return 1;
 	}
 	else if (buff_stat & TX_T_DONE) {
-		update_tx_stats(dev, ptxd->status, ptxd->len & 0x3ff);
+		update_tx_stats(dev, ptxd->status);
 		ptxd->len = 0;
 	}
 
@@ -1928,6 +1926,9 @@ static int au1000_tx(struct sk_buff *skb
 	else
 		ptxd->len = skb->len;
 
+	ps->tx_packets++;
+	ps->tx_bytes += ptxd->len;
+
 	ptxd->buff_stat = pDB->dma_addr | TX_DMA_ENABLE;
 	au_sync();
 	dev_kfree_skb(skb);