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netxen: Fix interrupt handling for multiport adapters 

This patch fixes masking of interrupts on multiport adapters. Also disables
interrupts upon ifdown interface. The wrong mask could result in interrupt
flood after interface is down.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
dhananjay@netxen.com 2007-07-25 20:13:12 +05:30 committed by Jeff Garzik
parent 7eec517c44
commit e01872af1d
1 changed files with 19 additions and 17 deletions
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36
drivers/net/netxen/netxen_nic_main.c
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@ -930,6 +930,8 @@ static int netxen_nic_close(struct net_device *netdev)
netif_carrier_off(netdev);
netif_stop_queue(netdev);
netxen_nic_disable_int(adapter);
cmd_buff = adapter->cmd_buf_arr;
for (i = 0; i < adapter->max_tx_desc_count; i++) {
buffrag = cmd_buff->frag_array;
@ -1243,28 +1245,12 @@ static int
netxen_handle_int(struct netxen_adapter *adapter, struct net_device *netdev)
{
u32 ret = 0;
u32 our_int = 0;
DPRINTK(INFO, "Entered handle ISR\n");
adapter->stats.ints++;
if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
/* not our interrupt */
if ((our_int & (0x80 << adapter->portnum)) == 0)
return ret;
}
netxen_nic_disable_int(adapter);
if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
/* claim interrupt */
if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
writel(our_int & ~((u32)(0x80 << adapter->portnum)),
NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
}
}
if (netxen_nic_rx_has_work(adapter) || netxen_nic_tx_has_work(adapter)) {
if (netif_rx_schedule_prep(netdev)) {
/*
@ -1298,6 +1284,7 @@ irqreturn_t netxen_intr(int irq, void *data)
{
struct netxen_adapter *adapter;
struct net_device *netdev;
u32 our_int = 0;
if (unlikely(!irq)) {
return IRQ_NONE; /* Not our interrupt */
@ -1305,7 +1292,22 @@ irqreturn_t netxen_intr(int irq, void *data)
adapter = (struct netxen_adapter *)data;
netdev = adapter->netdev;
/* process our status queue (for all 4 ports) */
if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
our_int = readl(NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
/* not our interrupt */
if ((our_int & (0x80 << adapter->portnum)) == 0)
return IRQ_NONE;
}
if (adapter->intr_scheme == INTR_SCHEME_PERPORT) {
/* claim interrupt */
if (!(adapter->flags & NETXEN_NIC_MSI_ENABLED)) {
writel(our_int & ~((u32)(0x80 << adapter->portnum)),
NETXEN_CRB_NORMALIZE(adapter, CRB_INT_VECTOR));
}
}
if (netif_running(netdev))
netxen_handle_int(adapter, netdev);