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authordhananjay@netxen.com <dhananjay@netxen.com>2007-07-25 20:13:12 +0530
committerJeff Garzik <jeff@garzik.org>2007-07-30 15:51:59 -0400
commite01872af1d05cf4327c8e519b14e368b72921ccf (patch)
treee29a9b3bbba37a8f4ab64e45cc25139c389e6a70 /drivers/net/netxen/netxen_nic_main.c
parent7eec517c444fad699d3fc66d110440edee1fb0ed (diff)
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>
Diffstat (limited to 'drivers/net/netxen/netxen_nic_main.c')
-rw-r--r--drivers/net/netxen/netxen_nic_main.c36
1 files changed, 19 insertions, 17 deletions
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 7d93bc3cb0d..bb8f5f2adab 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -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);