cxgb3: link fault fixes

Do not call t3_link_fault() under spinlock, as it calls msleep().
Besides, only the access to pi->link_fault needs to be serialized.

Also initialize local variables before checking the link status,
link state fields might otherwise end up containing garbage.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index 7ea48414c6cb..17858b9a5830 100644
--- a/drivers/net/cxgb3/cxgb3_main.c
+++ b/drivers/net/cxgb3/cxgb3_main.c
@@ -2496,14 +2496,16 @@ static void check_link_status(struct adapter *adapter)
         for_each_port(adapter, i) {
                 struct net_device *dev = adapter->port[i];
                 struct port_info *p = netdev_priv(dev);
+                int link_fault;
 
                 spin_lock_irq(&adapter->work_lock);
-                if (p->link_fault) {
+                link_fault = p->link_fault;
+                spin_unlock_irq(&adapter->work_lock);
+
+                if (link_fault) {
                         t3_link_fault(adapter, i);
-                        spin_unlock_irq(&adapter->work_lock);
                         continue;
                 }
-                spin_unlock_irq(&adapter->work_lock);
 
                 if (!(p->phy.caps & SUPPORTED_IRQ) && netif_running(dev)) {
                         t3_xgm_intr_disable(adapter, i);