From fa6cae143d58c74d800b8dbdd8b9f058614874f2 Mon Sep 17 00:00:00 2001 From: zeal Date: Mon, 16 Nov 2009 04:58:09 +0000 Subject: [PATCH] KS8695: fix ks8695_rx_irq() bug. ks8695 rx irq is edge-level. Before arriving at irq handler, the corresponding status bit has been clear(irq's ack). So we should not check it after that. Signed-off-by: zeal Signed-off-by: David S. Miller --- drivers/net/arm/ks8695net.c | 22 +++++++--------------- 1 file changed, 7 insertions(+), 15 deletions(-) diff --git a/drivers/net/arm/ks8695net.c b/drivers/net/arm/ks8695net.c index 0073d198715b..e15451a85107 100644 --- a/drivers/net/arm/ks8695net.c +++ b/drivers/net/arm/ks8695net.c @@ -433,24 +433,16 @@ ks8695_rx_irq(int irq, void *dev_id) { struct net_device *ndev = (struct net_device *)dev_id; struct ks8695_priv *ksp = netdev_priv(ndev); - unsigned long status; - - unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); spin_lock(&ksp->rx_lock); - status = readl(KS8695_IRQ_VA + KS8695_INTST); - - /*clean rx status bit*/ - writel(status | mask_bit , KS8695_IRQ_VA + KS8695_INTST); - - if (status & mask_bit) { - if (napi_schedule_prep(&ksp->napi)) { - /*disable rx interrupt*/ - status &= ~mask_bit; - writel(status , KS8695_IRQ_VA + KS8695_INTEN); - __napi_schedule(&ksp->napi); - } + if (napi_schedule_prep(&ksp->napi)) { + unsigned long status = readl(KS8695_IRQ_VA + KS8695_INTEN); + unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp); + /*disable rx interrupt*/ + status &= ~mask_bit; + writel(status , KS8695_IRQ_VA + KS8695_INTEN); + __napi_schedule(&ksp->napi); } spin_unlock(&ksp->rx_lock);