korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-18 17:54:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

KS8695: fix ks8695_rx_irq() bug.

Browse Source 
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>
This commit is contained in:
zeal 2009-11-16 04:58:09 +00:00 committed by David S. Miller
parent 3fd434d846
commit fa6cae143d
1 changed files with 7 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/net/arm/ks8695net.c
View File

@ -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);