From d15e9c4d9a75702b30e00cdf95c71c88e3f3f51e Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Sun, 17 Dec 2006 23:03:15 +0100 Subject: netpoll: drivers must not enable IRQ unconditionally in their NAPI handler net/core/netpoll.c::netpoll_send_skb() calls the poll handler when it is available. As netconsole can be used from almost any context, IRQ must not be enabled blindly in the NAPI handler of a driver which supports netpoll. b57bd06655a028aba7b92e1c19c2093e7fcfb341 fixed the issue for the 8139too.c driver. Signed-off-by: Francois Romieu Signed-off-by: Jeff Garzik --- drivers/net/forcedeth.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'drivers/net/forcedeth.c') diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c index 439f4133829..820f8c79842 100644 --- a/drivers/net/forcedeth.c +++ b/drivers/net/forcedeth.c @@ -2576,14 +2576,15 @@ static int nv_napi_poll(struct net_device *dev, int *budget) int pkts, limit = min(*budget, dev->quota); struct fe_priv *np = netdev_priv(dev); u8 __iomem *base = get_hwbase(dev); + unsigned long flags; pkts = nv_rx_process(dev, limit); if (nv_alloc_rx(dev)) { - spin_lock_irq(&np->lock); + spin_lock_irqsave(&np->lock, flags); if (!np->in_shutdown) mod_timer(&np->oom_kick, jiffies + OOM_REFILL); - spin_unlock_irq(&np->lock); + spin_unlock_irqrestore(&np->lock, flags); } if (pkts < limit) { @@ -2591,13 +2592,15 @@ static int nv_napi_poll(struct net_device *dev, int *budget) netif_rx_complete(dev); /* re-enable receive interrupts */ - spin_lock_irq(&np->lock); + spin_lock_irqsave(&np->lock, flags); + np->irqmask |= NVREG_IRQ_RX_ALL; if (np->msi_flags & NV_MSI_X_ENABLED) writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask); else writel(np->irqmask, base + NvRegIrqMask); - spin_unlock_irq(&np->lock); + + spin_unlock_irqrestore(&np->lock, flags); return 0; } else { /* used up our quantum, so reschedule */ -- cgit v1.2.3