diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2009-06-20 09:36:54 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-02-13 22:20:22 (GMT) |
| commit | 2a166e319081c389e19421fd8dc0589b3267a4e0 (patch) | |
| tree | 0a30a390da5c14e0c5e94b1f6715a499e84fdf42 /drivers/net/ethernet/atheros | |
| parent | b317cc9bb653158a9fa31cea6a62dbe93f08b486 (diff) | |
| download | linux-fsl-qoriq-2a166e319081c389e19421fd8dc0589b3267a4e0.tar.xz | |
drivers/net: fix livelock issues
Preempt-RT runs into a live lock issue with the NETDEV_TX_LOCKED micro
optimization. The reason is that the softirq thread is rescheduling
itself on that return value. Depending on priorities it starts to
monoplize the CPU and livelock on UP systems.
Remove it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/net/ethernet/atheros')
| -rw-r--r-- | drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 6 | ||||
| -rw-r--r-- | drivers/net/ethernet/atheros/atl1e/atl1e_main.c | 3 |
2 files changed, 2 insertions, 7 deletions
diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c index a36a760..34ebd1b 100644 --- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c +++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c @@ -2206,11 +2206,7 @@ static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb, } tpd_req = atl1c_cal_tpd_req(skb); - if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) { - if (netif_msg_pktdata(adapter)) - dev_info(&adapter->pdev->dev, "tx locked\n"); - return NETDEV_TX_LOCKED; - } + spin_lock_irqsave(&adapter->tx_lock, flags); if (atl1c_tpd_avail(adapter, type) < tpd_req) { /* no enough descriptor, just stop queue */ diff --git a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c index 1966444..d398960 100644 --- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c +++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c @@ -1838,8 +1838,7 @@ static netdev_tx_t atl1e_xmit_frame(struct sk_buff *skb, return NETDEV_TX_OK; } tpd_req = atl1e_cal_tdp_req(skb); - if (!spin_trylock_irqsave(&adapter->tx_lock, flags)) - return NETDEV_TX_LOCKED; + spin_lock_irqsave(&adapter->tx_lock, flags); if (atl1e_tpd_avail(adapter) < tpd_req) { /* no enough descriptor, just stop queue */ |