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path: root/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
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Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_multicast.c')
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_multicast.c62
1 files changed, 34 insertions, 28 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index ac33c8f3ea8..d9d1223c3fd 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -69,14 +69,13 @@ static void ipoib_mcast_free(struct ipoib_mcast *mcast)
struct net_device *dev = mcast->dev;
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_neigh *neigh, *tmp;
- unsigned long flags;
int tx_dropped = 0;
ipoib_dbg_mcast(netdev_priv(dev),
"deleting multicast group " IPOIB_GID_FMT "\n",
IPOIB_GID_ARG(mcast->mcmember.mgid));
- spin_lock_irqsave(&priv->lock, flags);
+ spin_lock_irq(&priv->lock);
list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) {
/*
@@ -90,7 +89,7 @@ static void ipoib_mcast_free(struct ipoib_mcast *mcast)
ipoib_neigh_free(dev, neigh);
}
- spin_unlock_irqrestore(&priv->lock, flags);
+ spin_unlock_irq(&priv->lock);
if (mcast->ah)
ipoib_put_ah(mcast->ah);
@@ -100,9 +99,9 @@ static void ipoib_mcast_free(struct ipoib_mcast *mcast)
dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
}
- spin_lock_irqsave(&priv->tx_lock, flags);
+ netif_tx_lock_bh(dev);
dev->stats.tx_dropped += tx_dropped;
- spin_unlock_irqrestore(&priv->tx_lock, flags);
+ netif_tx_unlock_bh(dev);
kfree(mcast);
}
@@ -259,10 +258,10 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
}
/* actually send any queued packets */
- spin_lock_irq(&priv->tx_lock);
+ netif_tx_lock_bh(dev);
while (!skb_queue_empty(&mcast->pkt_queue)) {
struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
- spin_unlock_irq(&priv->tx_lock);
+ netif_tx_unlock_bh(dev);
skb->dev = dev;
@@ -273,9 +272,9 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
if (dev_queue_xmit(skb))
ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
- spin_lock_irq(&priv->tx_lock);
+ netif_tx_lock_bh(dev);
}
- spin_unlock_irq(&priv->tx_lock);
+ netif_tx_unlock_bh(dev);
return 0;
}
@@ -286,7 +285,6 @@ ipoib_mcast_sendonly_join_complete(int status,
{
struct ipoib_mcast *mcast = multicast->context;
struct net_device *dev = mcast->dev;
- struct ipoib_dev_priv *priv = netdev_priv(dev);
/* We trap for port events ourselves. */
if (status == -ENETRESET)
@@ -302,12 +300,12 @@ ipoib_mcast_sendonly_join_complete(int status,
IPOIB_GID_ARG(mcast->mcmember.mgid), status);
/* Flush out any queued packets */
- spin_lock_irq(&priv->tx_lock);
+ netif_tx_lock_bh(dev);
while (!skb_queue_empty(&mcast->pkt_queue)) {
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
}
- spin_unlock_irq(&priv->tx_lock);
+ netif_tx_unlock_bh(dev);
/* Clear the busy flag so we try again */
status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY,
@@ -366,6 +364,21 @@ static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
return ret;
}
+void ipoib_mcast_carrier_on_task(struct work_struct *work)
+{
+ struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv,
+ carrier_on_task);
+
+ /*
+ * Take rtnl_lock to avoid racing with ipoib_stop() and
+ * turning the carrier back on while a device is being
+ * removed.
+ */
+ rtnl_lock();
+ netif_carrier_on(priv->dev);
+ rtnl_unlock();
+}
+
static int ipoib_mcast_join_complete(int status,
struct ib_sa_multicast *multicast)
{
@@ -392,16 +405,12 @@ static int ipoib_mcast_join_complete(int status,
&priv->mcast_task, 0);
mutex_unlock(&mcast_mutex);
- if (mcast == priv->broadcast) {
- /*
- * Take RTNL lock here to avoid racing with
- * ipoib_stop() and turning the carrier back
- * on while a device is being removed.
- */
- rtnl_lock();
- netif_carrier_on(dev);
- rtnl_unlock();
- }
+ /*
+ * Defer carrier on work to ipoib_workqueue to avoid a
+ * deadlock on rtnl_lock here.
+ */
+ if (mcast == priv->broadcast)
+ queue_work(ipoib_workqueue, &priv->carrier_on_task);
return 0;
}
@@ -651,12 +660,9 @@ void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_mcast *mcast;
+ unsigned long flags;
- /*
- * We can only be called from ipoib_start_xmit, so we're
- * inside tx_lock -- no need to save/restore flags.
- */
- spin_lock(&priv->lock);
+ spin_lock_irqsave(&priv->lock, flags);
if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) ||
!priv->broadcast ||
@@ -727,7 +733,7 @@ out:
}
unlock:
- spin_unlock(&priv->lock);
+ spin_unlock_irqrestore(&priv->lock, flags);
}
void ipoib_mcast_dev_flush(struct net_device *dev)