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IPoIB: Use netif_tx_lock() and get rid of private tx_lock, LLTX 

Currently, IPoIB is an LLTX driver that uses its own IRQ-disabling
tx_lock.  Not only do we want to get rid of LLTX, this actually causes
problems because of the skb_orphan() done with this tx_lock held: some
skb destructors expect to be run with interrupts enabled.

The simplest fix for this is to get rid of the driver-private tx_lock
and stop using LLTX.  We kill off priv->tx_lock and use
netif_tx_lock[_bh]() instead; the patch to do this is a tiny bit
tricky because we need to update places that take priv->lock inside
the tx_lock to disable IRQs, rather than relying on tx_lock having
already disabled IRQs.

Also, there are a couple of places where we need to disable BHs to
make sure we have a consistent context to call netif_tx_lock() (since
we no longer can use _irqsave() variants), and we also have to change
ipoib_send_comp_handler() to call drain_tx_cq() through a timer rather
than directly, because ipoib_send_comp_handler() runs in interrupt
context and drain_tx_cq() must run in BH context so it can call
netif_tx_lock().

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier 2008-09-30 10:36:21 -07:00
parent c9da4bad5b
commit 943c246e9b
5 changed files with 118 additions and 107 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/infiniband/ulp/ipoib/ipoib.h
View File

@ -268,10 +268,9 @@ struct ipoib_lro {
};
/*
* Device private locking: tx_lock protects members used in TX fast
* path (and we use LLTX so upper layers don't do extra locking).
* lock protects everything else. lock nests inside of tx_lock (ie
* tx_lock must be acquired first if needed).
* Device private locking: network stack tx_lock protects members used
* in TX fast path, lock protects everything else. lock nests inside
* of tx_lock (ie tx_lock must be acquired first if needed).
*/
struct ipoib_dev_priv {
spinlock_t lock;
@ -320,7 +319,6 @@ struct ipoib_dev_priv {
struct ipoib_rx_buf *rx_ring;
spinlock_t tx_lock;
struct ipoib_tx_buf *tx_ring;
unsigned tx_head;
unsigned tx_tail;

88
drivers/infiniband/ulp/ipoib/ipoib_cm.c
View File

@ -786,7 +786,8 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
dev_kfree_skb_any(tx_req->skb);
spin_lock_irqsave(&priv->tx_lock, flags);
netif_tx_lock(dev);
++tx->tx_tail;
if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
netif_queue_stopped(dev) &&
@ -801,7 +802,7 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
"(status=%d, wrid=%d vend_err %x)\n",
wc->status, wr_id, wc->vendor_err);
spin_lock(&priv->lock);
spin_lock_irqsave(&priv->lock, flags);
neigh = tx->neigh;
if (neigh) {
@ -821,10 +822,10 @@ void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
clear_bit(IPOIB_FLAG_OPER_UP, &tx->flags);
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
}
spin_unlock_irqrestore(&priv->tx_lock, flags);
netif_tx_unlock(dev);
}
int ipoib_cm_dev_open(struct net_device *dev)
@ -1149,7 +1150,6 @@ static void ipoib_cm_tx_destroy(struct ipoib_cm_tx *p)
{
struct ipoib_dev_priv *priv = netdev_priv(p->dev);
struct ipoib_cm_tx_buf *tx_req;
unsigned long flags;
unsigned long begin;
ipoib_dbg(priv, "Destroy active connection 0x%x head 0x%x tail 0x%x\n",
@ -1180,12 +1180,12 @@ timeout:
DMA_TO_DEVICE);
dev_kfree_skb_any(tx_req->skb);
++p->tx_tail;
spin_lock_irqsave(&priv->tx_lock, flags);
netif_tx_lock_bh(p->dev);
if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
netif_queue_stopped(p->dev) &&
test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
netif_wake_queue(p->dev);
spin_unlock_irqrestore(&priv->tx_lock, flags);
netif_tx_unlock_bh(p->dev);
}
if (p->qp)
@ -1202,6 +1202,7 @@ static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id,
struct ipoib_dev_priv *priv = netdev_priv(tx->dev);
struct net_device *dev = priv->dev;
struct ipoib_neigh *neigh;
unsigned long flags;
int ret;
switch (event->event) {
@ -1220,8 +1221,8 @@ static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id,
case IB_CM_REJ_RECEIVED:
case IB_CM_TIMEWAIT_EXIT:
ipoib_dbg(priv, "CM error %d.\n", event->event);
spin_lock_irq(&priv->tx_lock);
spin_lock(&priv->lock);
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
neigh = tx->neigh;
if (neigh) {
@ -1239,8 +1240,8 @@ static int ipoib_cm_tx_handler(struct ib_cm_id *cm_id,
queue_work(ipoib_workqueue, &priv->cm.reap_task);
}
spin_unlock(&priv->lock);
spin_unlock_irq(&priv->tx_lock);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
break;
default:
break;
@ -1294,19 +1295,24 @@ static void ipoib_cm_tx_start(struct work_struct *work)
struct ib_sa_path_rec pathrec;
u32 qpn;
spin_lock_irqsave(&priv->tx_lock, flags);
spin_lock(&priv->lock);
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
while (!list_empty(&priv->cm.start_list)) {
p = list_entry(priv->cm.start_list.next, typeof(*p), list);
list_del_init(&p->list);
neigh = p->neigh;
qpn = IPOIB_QPN(neigh->neighbour->ha);
memcpy(&pathrec, &p->path->pathrec, sizeof pathrec);
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->tx_lock, flags);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
ret = ipoib_cm_tx_init(p, qpn, &pathrec);
spin_lock_irqsave(&priv->tx_lock, flags);
spin_lock(&priv->lock);
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
if (ret) {
neigh = p->neigh;
if (neigh) {
@ -1320,44 +1326,52 @@ static void ipoib_cm_tx_start(struct work_struct *work)
kfree(p);
}
}
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->tx_lock, flags);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
}
static void ipoib_cm_tx_reap(struct work_struct *work)
{
struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv,
cm.reap_task);
struct net_device *dev = priv->dev;
struct ipoib_cm_tx *p;
unsigned long flags;
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
spin_lock_irq(&priv->tx_lock);
spin_lock(&priv->lock);
while (!list_empty(&priv->cm.reap_list)) {
p = list_entry(priv->cm.reap_list.next, typeof(*p), list);
list_del(&p->list);
spin_unlock(&priv->lock);
spin_unlock_irq(&priv->tx_lock);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
ipoib_cm_tx_destroy(p);
spin_lock_irq(&priv->tx_lock);
spin_lock(&priv->lock);
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
}
spin_unlock(&priv->lock);
spin_unlock_irq(&priv->tx_lock);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
}
static void ipoib_cm_skb_reap(struct work_struct *work)
{
struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv,
cm.skb_task);
struct net_device *dev = priv->dev;
struct sk_buff *skb;
unsigned long flags;
unsigned mtu = priv->mcast_mtu;
spin_lock_irq(&priv->tx_lock);
spin_lock(&priv->lock);
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
while ((skb = skb_dequeue(&priv->cm.skb_queue))) {
spin_unlock(&priv->lock);
spin_unlock_irq(&priv->tx_lock);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
if (skb->protocol == htons(ETH_P_IP))
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu));
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
@ -1365,11 +1379,13 @@ static void ipoib_cm_skb_reap(struct work_struct *work)
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, priv->dev);
#endif
dev_kfree_skb_any(skb);
spin_lock_irq(&priv->tx_lock);
spin_lock(&priv->lock);
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
}
spin_unlock(&priv->lock);
spin_unlock_irq(&priv->tx_lock);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
}
void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,

30
drivers/infiniband/ulp/ipoib/ipoib_ib.c
View File

@ -468,21 +468,22 @@ void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
static void drain_tx_cq(struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
unsigned long flags;
spin_lock_irqsave(&priv->tx_lock, flags);
netif_tx_lock(dev);
while (poll_tx(priv))
; /* nothing */
if (netif_queue_stopped(dev))
mod_timer(&priv->poll_timer, jiffies + 1);
spin_unlock_irqrestore(&priv->tx_lock, flags);
netif_tx_unlock(dev);
}
void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr)
{
drain_tx_cq((struct net_device *)dev_ptr);
struct ipoib_dev_priv *priv = netdev_priv(dev_ptr);
mod_timer(&priv->poll_timer, jiffies);
}
static inline int post_send(struct ipoib_dev_priv *priv,
@ -614,17 +615,20 @@ static void __ipoib_reap_ah(struct net_device *dev)
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_ah *ah, *tah;
LIST_HEAD(remove_list);
unsigned long flags;
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
spin_lock_irq(&priv->tx_lock);
spin_lock(&priv->lock);
list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
list_del(&ah->list);
ib_destroy_ah(ah->ah);
kfree(ah);
}
spin_unlock(&priv->lock);
spin_unlock_irq(&priv->tx_lock);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
}
void ipoib_reap_ah(struct work_struct *work)
@ -761,6 +765,14 @@ void ipoib_drain_cq(struct net_device *dev)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
int i, n;
/*
* We call completion handling routines that expect to be
* called from the BH-disabled NAPI poll context, so disable
* BHs here too.
*/
local_bh_disable();
do {
n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
for (i = 0; i < n; ++i) {
@ -784,6 +796,8 @@ void ipoib_drain_cq(struct net_device *dev)
while (poll_tx(priv))
; /* nothing */
local_bh_enable();
}
int ipoib_ib_dev_stop(struct net_device *dev, int flush)

68
drivers/infiniband/ulp/ipoib/ipoib_main.c
View File

@ -373,9 +373,10 @@ void ipoib_flush_paths(struct net_device *dev)
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_path *path, *tp;
LIST_HEAD(remove_list);
unsigned long flags;
spin_lock_irq(&priv->tx_lock);
spin_lock(&priv->lock);
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
list_splice_init(&priv->path_list, &remove_list);
@ -385,15 +386,16 @@ void ipoib_flush_paths(struct net_device *dev)
list_for_each_entry_safe(path, tp, &remove_list, list) {
if (path->query)
ib_sa_cancel_query(path->query_id, path->query);
spin_unlock(&priv->lock);
spin_unlock_irq(&priv->tx_lock);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
wait_for_completion(&path->done);
path_free(dev, path);
spin_lock_irq(&priv->tx_lock);
spin_lock(&priv->lock);
netif_tx_lock_bh(dev);
spin_lock_irqsave(&priv->lock, flags);
}
spin_unlock(&priv->lock);
spin_unlock_irq(&priv->tx_lock);
spin_unlock_irqrestore(&priv->lock, flags);
netif_tx_unlock_bh(dev);
}
static void path_rec_completion(int status,
@ -555,6 +557,7 @@ static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_path *path;
struct ipoib_neigh *neigh;
unsigned long flags;
neigh = ipoib_neigh_alloc(skb->dst->neighbour, skb->dev);
if (!neigh) {
@ -563,11 +566,7 @@ static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
return;
}
/*
* 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);
path = __path_find(dev, skb->dst->neighbour->ha + 4);
if (!path) {
@ -614,7 +613,7 @@ static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
__skb_queue_tail(&neigh->queue, skb);
}
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
return;
err_list:
@ -626,7 +625,7 @@ err_drop:
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
}
static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
@ -650,12 +649,9 @@ static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_path *path;
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);
path = __path_find(dev, phdr->hwaddr + 4);
if (!path || !path->valid) {
@ -667,7 +663,7 @@ static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
__skb_queue_tail(&path->queue, skb);
if (path_rec_start(dev, path)) {
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
path_free(dev, path);
return;
} else
@ -677,7 +673,7 @@ static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
dev_kfree_skb_any(skb);
}
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
return;
}
@ -696,7 +692,7 @@ static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
dev_kfree_skb_any(skb);
}
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
}
static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
@ -705,13 +701,10 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
struct ipoib_neigh *neigh;
unsigned long flags;
if (unlikely(!spin_trylock_irqsave(&priv->tx_lock, flags)))
return NETDEV_TX_LOCKED;
if (likely(skb->dst && skb->dst->neighbour)) {
if (unlikely(!*to_ipoib_neigh(skb->dst->neighbour))) {
ipoib_path_lookup(skb, dev);
goto out;
return NETDEV_TX_OK;
}
neigh = *to_ipoib_neigh(skb->dst->neighbour);
@ -721,7 +714,7 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
skb->dst->neighbour->ha + 4,
sizeof(union ib_gid))) ||
(neigh->dev != dev))) {
spin_lock(&priv->lock);
spin_lock_irqsave(&priv->lock, flags);
/*
* It's safe to call ipoib_put_ah() inside
* priv->lock here, because we know that
@ -732,25 +725,25 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
ipoib_put_ah(neigh->ah);
list_del(&neigh->list);
ipoib_neigh_free(dev, neigh);
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
ipoib_path_lookup(skb, dev);
goto out;
return NETDEV_TX_OK;
}
if (ipoib_cm_get(neigh)) {
if (ipoib_cm_up(neigh)) {
ipoib_cm_send(dev, skb, ipoib_cm_get(neigh));
goto out;
return NETDEV_TX_OK;
}
} else if (neigh->ah) {
ipoib_send(dev, skb, neigh->ah, IPOIB_QPN(skb->dst->neighbour->ha));
goto out;
return NETDEV_TX_OK;
}
if (skb_queue_len(&neigh->queue) < IPOIB_MAX_PATH_REC_QUEUE) {
spin_lock(&priv->lock);
spin_lock_irqsave(&priv->lock, flags);
__skb_queue_tail(&neigh->queue, skb);
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
} else {
++dev->stats.tx_dropped;
dev_kfree_skb_any(skb);
@ -779,16 +772,13 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
IPOIB_GID_RAW_ARG(phdr->hwaddr + 4));
dev_kfree_skb_any(skb);
++dev->stats.tx_dropped;
goto out;
return NETDEV_TX_OK;
}
unicast_arp_send(skb, dev, phdr);
}
}
out:
spin_unlock_irqrestore(&priv->tx_lock, flags);
return NETDEV_TX_OK;
}
@ -1052,7 +1042,6 @@ static void ipoib_setup(struct net_device *dev)
dev->type = ARPHRD_INFINIBAND;
dev->tx_queue_len = ipoib_sendq_size * 2;
dev->features = (NETIF_F_VLAN_CHALLENGED |
NETIF_F_LLTX |
NETIF_F_HIGHDMA);
memcpy(dev->broadcast, ipv4_bcast_addr, INFINIBAND_ALEN);
@ -1064,7 +1053,6 @@ static void ipoib_setup(struct net_device *dev)
ipoib_lro_setup(priv);
spin_lock_init(&priv->lock);
spin_lock_init(&priv->tx_lock);
mutex_init(&priv->vlan_mutex);

31
drivers/infiniband/ulp/ipoib/ipoib_multicast.c
View File

@ -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,
@ -662,12 +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 ||
@ -738,7 +733,7 @@ out:
}
unlock:
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
}
void ipoib_mcast_dev_flush(struct net_device *dev)