diff options
| author | zeal <zealcook@gmail.com> | 2009-11-16 04:58:09 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-16 23:51:47 -0800 |
| commit | fa6cae143d58c74d800b8dbdd8b9f058614874f2 (patch) | |
| tree | 1c6fe4587fb192ceef6b47ad2ea650a7b1aef732 | |
| parent | 3fd434d846a2c87f8f705b6876f81e4053f93749 (diff) | |
| download | blackbird-op-linux-fa6cae143d58c74d800b8dbdd8b9f058614874f2.tar.gz blackbird-op-linux-fa6cae143d58c74d800b8dbdd8b9f058614874f2.zip | |
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 <zealcook@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/arm/ks8695net.c | 22 |
1 files 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); |
