From 34692421bc7d6145ef383b014860f4fde10b7505 Mon Sep 17 00:00:00 2001 From: Jiajun Wu Date: Mon, 18 Jan 2010 05:47:50 +0000 Subject: ucc_geth: Fix full TX queue processing commit 7583605b6d29f1f7f6fc505b883328089f3485ad ("ucc_geth: Fix empty TX queue processing") fixed empty TX queue mishandling, but didn't account another corner case: when TX queue becomes full. Without this patch the driver will stop transmiting when TX queue becomes full since 'bd == ugeth->txBd[txQ]' actually checks for two things: queue empty or full. Let's better check for NULL skb, which unambiguously signals an empty queue. Signed-off-by: Jiajun Wu Signed-off-by: Anton Vorontsov Cc: Stable [2.6.32] Signed-off-by: David S. Miller --- drivers/net/ucc_geth.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'drivers/net/ucc_geth.c') diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c index 96bdc0b43889..eb8fe7e16c6c 100644 --- a/drivers/net/ucc_geth.c +++ b/drivers/net/ucc_geth.c @@ -3279,13 +3279,12 @@ static int ucc_geth_tx(struct net_device *dev, u8 txQ) /* Handle the transmitted buffer and release */ /* the BD to be used with the current frame */ - if (bd == ugeth->txBd[txQ]) /* queue empty? */ + skb = ugeth->tx_skbuff[txQ][ugeth->skb_dirtytx[txQ]]; + if (!skb) break; dev->stats.tx_packets++; - skb = ugeth->tx_skbuff[txQ][ugeth->skb_dirtytx[txQ]]; - if (skb_queue_len(&ugeth->rx_recycle) < RX_BD_RING_LEN && skb_recycle_check(skb, ugeth->ug_info->uf_info.max_rx_buf_length + -- cgit v1.2.3-59-g8ed1b