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cxgb3: fix link fault handling

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Use the existing periodic task to handle link faults.
The link fault interrupt handler is also called in work queue context,
which is wrong and might cause potential deadlocks.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Divy Le Ray 2009-04-17 12:21:11 +00:00 committed by David S. Miller
parent 7816a0a862
commit 3851c66cf0
2 changed files with 3 additions and 30 deletions
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22
drivers/net/cxgb3/cxgb3_main.c
View File

@ -2493,6 +2493,7 @@ static void check_link_status(struct adapter *adapter)
spin_lock_irq(&adapter->work_lock);
if (p->link_fault) {
t3_link_fault(adapter, i);
spin_unlock_irq(&adapter->work_lock);
continue;
}
@ -2554,9 +2555,7 @@ static void t3_adap_check_task(struct work_struct *work)
adapter->check_task_cnt++;
/* Check link status for PHYs without interrupts */
if (p->linkpoll_period)
check_link_status(adapter);
check_link_status(adapter);
/* Accumulate MAC stats if needed */
if (!p->linkpoll_period ||
@ -2680,21 +2679,6 @@ void t3_os_ext_intr_handler(struct adapter *adapter)
spin_unlock(&adapter->work_lock);
}
static void link_fault_task(struct work_struct *work)
{
struct adapter *adapter = container_of(work, struct adapter,
link_fault_handler_task);
int i;
for_each_port(adapter, i) {
struct net_device *netdev = adapter->port[i];
struct port_info *pi = netdev_priv(netdev);
if (pi->link_fault)
t3_link_fault(adapter, i);
}
}
void t3_os_link_fault_handler(struct adapter *adapter, int port_id)
{
struct net_device *netdev = adapter->port[port_id];
@ -2702,7 +2686,6 @@ void t3_os_link_fault_handler(struct adapter *adapter, int port_id)
spin_lock(&adapter->work_lock);
pi->link_fault = 1;
queue_work(cxgb3_wq, &adapter->link_fault_handler_task);
spin_unlock(&adapter->work_lock);
}
@ -3082,7 +3065,6 @@ static int __devinit init_one(struct pci_dev *pdev,
INIT_LIST_HEAD(&adapter->adapter_list);
INIT_WORK(&adapter->ext_intr_handler_task, ext_intr_task);
INIT_WORK(&adapter->link_fault_handler_task, link_fault_task);
INIT_WORK(&adapter->fatal_error_handler_task, fatal_error_task);
INIT_DELAYED_WORK(&adapter->adap_check_task, t3_adap_check_task);

11
drivers/net/cxgb3/t3_hw.c
View File

@ -1202,7 +1202,6 @@ void t3_link_changed(struct adapter *adapter, int port_id)
struct cphy *phy = &pi->phy;
struct cmac *mac = &pi->mac;
struct link_config *lc = &pi->link_config;
int force_link_down = 0;
phy->ops->get_link_status(phy, &link_ok, &speed, &duplex, &fc);
@ -1218,14 +1217,9 @@ void t3_link_changed(struct adapter *adapter, int port_id)
status = t3_read_reg(adapter, A_XGM_INT_STATUS + mac->offset);
if (status & F_LINKFAULTCHANGE) {
mac->stats.link_faults++;
force_link_down = 1;
pi->link_fault = 1;
}
t3_open_rx_traffic(mac, rx_cfg, rx_hash_high, rx_hash_low);
if (force_link_down) {
t3_os_link_fault_handler(adapter, port_id);
return;
}
}
if (lc->requested_fc & PAUSE_AUTONEG)
@ -1292,9 +1286,6 @@ void t3_link_fault(struct adapter *adapter, int port_id)
/* Account link faults only when the phy reports a link up */
if (link_ok)
mac->stats.link_faults++;
msleep(1000);
t3_os_link_fault_handler(adapter, port_id);
} else {
if (link_ok)
t3_write_reg(adapter, A_XGM_XAUI_ACT_CTRL + mac->offset,