diff options
| author |   Jitendra Kalsaria <jitendra.kalsaria@qlogic.com> | 2012-07-10 14:57:31 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2012-07-10 23:28:33 -0700 |
| commit | 41812db8e2111abbebff4fccffecab1fc1eb090c (patch) | |
| tree | 63a08411f7b424aed2e264e126ae5ae17e403fe9 /drivers/net/ethernet/qlogic/qlge/qlge_main.c | |
| parent | net: calxedaxgmac: enable rx cut-thru mode (diff) | |
| download | linux-dev-41812db8e2111abbebff4fccffecab1fc1eb090c.tar.xz linux-dev-41812db8e2111abbebff4fccffecab1fc1eb090c.zip | |
qlge: Fix TX queue stoppage due to full condition.
TX queue was being stopped at beginning of send path instead
of at the end when last descriptor is used.
Signed-off-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/qlogic/qlge/qlge_main.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/net/ethernet/qlogic/qlge/qlge_main.c b/drivers/net/ethernet/qlogic/qlge/qlge_main.c index ca427eb32369..fb86f06e8f1e 100644 --- a/drivers/net/ethernet/qlogic/qlge/qlge_main.c +++ b/drivers/net/ethernet/qlogic/qlge/qlge_main.c @@ -2556,7 +2556,7 @@ static netdev_tx_t qlge_send(struct sk_buff *skb, struct net_device *ndev) if (unlikely(atomic_read(&tx_ring->tx_count) < 2)) { netif_info(qdev, tx_queued, qdev->ndev, - "%s: shutting down tx queue %d du to lack of resources.\n", + "%s: BUG! shutting down tx queue %d due to lack of resources.\n", __func__, tx_ring_idx); netif_stop_subqueue(ndev, tx_ring->wq_id); atomic_inc(&tx_ring->queue_stopped); @@ -2610,6 +2610,16 @@ static netdev_tx_t qlge_send(struct sk_buff *skb, struct net_device *ndev) tx_ring->prod_idx, skb->len); atomic_dec(&tx_ring->tx_count); + + if (unlikely(atomic_read(&tx_ring->tx_count) < 2)) { + netif_stop_subqueue(ndev, tx_ring->wq_id); + if ((atomic_read(&tx_ring->tx_count) > (tx_ring->wq_len / 4))) + /* + * The queue got stopped because the tx_ring was full. + * Wake it up, because it's now at least 25% empty. + */ + netif_wake_subqueue(qdev->ndev, tx_ring->wq_id); + } return NETDEV_TX_OK; } |