From: Francois Romieu Date: Wed, 1 Aug 2007 22:00:48 +0000 (+0200) Subject: r8169: avoid needless NAPI poll scheduling X-Git-Tag: v2.6.23-rc3~85^2 X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=313b0305b5a1e7e0fb39383befbf79558ce68a9c;p=linux-2.6-omap-h63xx.git r8169: avoid needless NAPI poll scheduling Theory : though needless, it should not have hurt. Practice: it does not play nice with DEBUG_SHIRQ + LOCKDEP + UP (see https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=242572). The patch makes sense in itself but I should dig why it has an effect on #242572 (assuming that NAPI do not change in a near future). Signed-off-by: Francois Romieu Cc: Edward Hsu --- diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index ec4f545c491..631e55dbbdd 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -2767,14 +2767,16 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance) rtl8169_check_link_status(dev, tp, ioaddr); #ifdef CONFIG_R8169_NAPI - RTL_W16(IntrMask, tp->intr_event & ~tp->napi_event); - tp->intr_mask = ~tp->napi_event; - - if (likely(netif_rx_schedule_prep(dev))) - __netif_rx_schedule(dev); - else if (netif_msg_intr(tp)) { - printk(KERN_INFO "%s: interrupt %04x taken in poll\n", - dev->name, status); + if (status & tp->napi_event) { + RTL_W16(IntrMask, tp->intr_event & ~tp->napi_event); + tp->intr_mask = ~tp->napi_event; + + if (likely(netif_rx_schedule_prep(dev))) + __netif_rx_schedule(dev); + else if (netif_msg_intr(tp)) { + printk(KERN_INFO "%s: interrupt %04x in poll\n", + dev->name, status); + } } break; #else