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ar71xx: ack completed tx descriptors only after the full frame has been completed 

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

Backport of r42457

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42475 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2014-09-11 15:14:05 +00:00
parent 77b9180228
commit 509e168418
1 changed files with 16 additions and 10 deletions
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26
target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
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@ -901,11 +901,12 @@ static int ag71xx_tx_packets(struct ag71xx *ag)
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
int sent = 0;
int bytes_compl = 0;
int n = 0;
DBG("%s: processing TX ring\n", ag->dev->name);
while (ring->dirty != ring->curr) {
unsigned int i = ring->dirty % ring->size;
while (ring->dirty + n != ring->curr) {
unsigned int i = (ring->dirty + n) % ring->size;
struct ag71xx_desc *desc = ring->buf[i].desc;
struct sk_buff *skb = ring->buf[i].skb;
@ -916,17 +917,22 @@ static int ag71xx_tx_packets(struct ag71xx *ag)
break;
}
ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
n++;
if (!skb)
continue;
if (skb) {
dev_kfree_skb_any(skb);
ring->buf[i].skb = NULL;
dev_kfree_skb_any(skb);
ring->buf[i].skb = NULL;
bytes_compl += ring->buf[i].len;
sent++;
bytes_compl += ring->buf[i].len;
sent++;
ring->dirty += n;
while (n > 0) {
ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
n--;
}
ring->dirty++;
}
DBG("%s: %d packets sent out\n", ag->dev->name, sent);