[PATCH] net: lpc_eth: fix tx completion
From: Eric Dumazet <hidden>
Date: 2012-06-11 17:21:43
Also in:
lkml, netdev
Subsystem:
arm/lpc32xx soc support, networking drivers, the rest · Maintainers:
Vladimir Zapolskiy, Piotr Wojtaszczyk, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Eric Dumazet <edumazet@google.com> __lpc_handle_xmit() has two bugs : 1) It can leak skbs in case TXSTATUS_ERROR is set 2) It can wake up txqueue while no slot was freed. Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Roland Stigge <redacted> Tested-by: Roland Stigge <redacted> Cc: Kevin Wells <redacted> --- drivers/net/ethernet/nxp/lpc_eth.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 8d2666f..ff76c21 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c@@ -946,16 +946,16 @@ static void __lpc_handle_xmit(struct net_device *ndev) /* Update stats */ ndev->stats.tx_packets++; ndev->stats.tx_bytes += skb->len; - - /* Free buffer */ - dev_kfree_skb_irq(skb); } + dev_kfree_skb_irq(skb); txcidx = readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base)); } - if (netif_queue_stopped(ndev)) - netif_wake_queue(ndev); + if (pldat->num_used_tx_buffs <= ENET_TX_DESC/2) { + if (netif_queue_stopped(ndev)) + netif_wake_queue(ndev); + } } static int __lpc_handle_recv(struct net_device *ndev, int budget)