From e01872af1d05cf4327c8e519b14e368b72921ccf Mon Sep 17 00:00:00 2001 From: "dhananjay@netxen.com" Date: Wed, 25 Jul 2007 20:13:12 +0530 Subject: 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 Signed-off-by: Jeff Garzik --- drivers/net/netxen/netxen_nic_main.c | 36 +++++++++++++++++++----------------- 1 file changed, 19 insertions(+), 17 deletions(-) diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c index 7d93bc3..bb8f5f2 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); -- cgit v1.1