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>

diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index 7ea48414c6cbdd26b37d781d5532462cb80ffa36..17858b9a583050e6c7aefb2055fcd6740db9a858 100644 (file)
--- 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);

diff --git a/drivers/net/cxgb3/t3_hw.c b/drivers/net/cxgb3/t3_hw.c
index 4f68aeb2679adcbf0f11a617ab815fa06a6bb9f5..4950d5d789ae8c66e53ec4061789303e674a1923 100644 (file)
--- a/drivers/net/cxgb3/t3_hw.c
+++ b/drivers/net/cxgb3/t3_hw.c
@@ -1274,6 +1274,11 @@ void t3_link_fault(struct adapter *adapter, int port_id)
                                 A_XGM_INT_STATUS + mac->offset);
        link_fault &= F_LINKFAULTCHANGE;
 
+       link_ok = lc->link_ok;
+       speed = lc->speed;
+       duplex = lc->duplex;
+       fc = lc->fc;
+
        phy->ops->get_link_status(phy, &link_ok, &speed, &duplex, &fc);
 
        if (link_fault) {