[PATCH 3/3]: netdev: Do not use TX lock to protect address lists.
From: David Miller <davem@davemloft.net>
Date: 2008-06-24 03:54:23
Subsystem:
bonding driver, infiniband subsystem, mac80211, media input infrastructure (v4l/dvb), networking drivers, networking drivers (wireless), networking [general], the rest, tun/tap driver · Maintainers:
Jay Vosburgh, Jason Gunthorpe, Leon Romanovsky, Johannes Berg, Mauro Carvalho Chehab, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Willem de Bruijn, Jason Wang
netdev: Do not use TX lock to protect address lists. Now that we have a specific lock to protect the network device unicast and multicast lists, remove extraneous grabs of the TX lock in cases where the code only needs address list protection. Signed-off-by: David S. Miller <davem@davemloft.net> --- drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 2 - drivers/media/dvb/dvb-core/dvb_net.c | 6 +-- drivers/net/bonding/bond_main.c | 24 +++++---------- drivers/net/sfc/efx.c | 6 +-- drivers/net/tun.c | 12 ++----- drivers/net/wireless/libertas/main.c | 6 +-- net/core/dev.c | 38 +++++++---------------- net/core/dev_mcast.c | 32 ++++++-------------- net/mac80211/main.c | 12 ++----- net/mac80211/mlme.c | 6 +-- 10 files changed, 46 insertions(+), 98 deletions(-)
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index 261ab71..cd2fb95 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c@@ -774,7 +774,6 @@ void ipoib_mcast_restart_task(struct work_struct *work) ipoib_mcast_stop_thread(dev, 0); local_irq_save(flags); - netif_tx_lock(dev); netif_addr_lock(dev); spin_lock(&priv->lock);
@@ -853,7 +852,6 @@ void ipoib_mcast_restart_task(struct work_struct *work) spin_unlock(&priv->lock); netif_addr_unlock(dev); - netif_tx_unlock(dev); local_irq_restore(flags); /* We have to cancel outside of the spinlock */
diff --git a/drivers/media/dvb/dvb-core/dvb_net.c b/drivers/media/dvb/dvb-core/dvb_net.c
index 809d18c..c2c0337 100644
--- a/drivers/media/dvb/dvb-core/dvb_net.c
+++ b/drivers/media/dvb/dvb-core/dvb_net.c@@ -1133,8 +1133,7 @@ static void wq_set_multicast_list (struct work_struct *work) dvb_net_feed_stop(dev); priv->rx_mode = RX_MODE_UNI; - netif_tx_lock_bh(dev); - netif_addr_lock(dev); + netif_addr_lock_bh(dev); if (dev->flags & IFF_PROMISC) { dprintk("%s: promiscuous mode\n", dev->name);
@@ -1159,8 +1158,7 @@ static void wq_set_multicast_list (struct work_struct *work) } } - netif_addr_unlock(dev); - netif_tx_unlock_bh(dev); + netif_addr_unlock_bh(dev); dvb_net_feed_start(dev); }
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 6601ffc..f92fa58 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c@@ -1552,14 +1552,12 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) dev_set_allmulti(slave_dev, 1); } - netif_tx_lock_bh(bond_dev); - netif_addr_lock(bond_dev); + netif_addr_lock_bh(bond_dev); /* upload master's mc_list to new slave */ for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); } - netif_addr_unlock(bond_dev); - netif_tx_unlock_bh(bond_dev); + netif_addr_unlock_bh(bond_dev); } if (bond->params.mode == BOND_MODE_8023AD) {
@@ -1923,11 +1921,9 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) } /* flush master's mc_list from slave */ - netif_tx_lock_bh(bond_dev); - netif_addr_lock(bond_dev); + netif_addr_lock_bh(bond_dev); bond_mc_list_flush(bond_dev, slave_dev); - netif_addr_unlock(bond_dev); - netif_tx_unlock_bh(bond_dev); + netif_addr_unlock_bh(bond_dev); } netdev_set_master(slave_dev, NULL);
@@ -2048,11 +2044,9 @@ static int bond_release_all(struct net_device *bond_dev) } /* flush master's mc_list from slave */ - netif_tx_lock_bh(bond_dev); - netif_addr_lock(bond_dev); + netif_addr_lock_bh(bond_dev); bond_mc_list_flush(bond_dev, slave_dev); - netif_addr_unlock(bond_dev); - netif_tx_unlock_bh(bond_dev); + netif_addr_unlock_bh(bond_dev); } netdev_set_master(slave_dev, NULL);
@@ -4656,11 +4650,9 @@ static void bond_free_all(void) struct net_device *bond_dev = bond->dev; bond_work_cancel_all(bond); - netif_tx_lock_bh(bond_dev); - netif_addr_lock(bond_dev); + netif_addr_lock_bh(bond_dev); bond_mc_list_destroy(bond); - netif_addr_unlock(bond_dev); - netif_tx_unlock_bh(bond_dev); + netif_addr_unlock_bh(bond_dev); /* Release the bonded slaves */ bond_release_all(bond_dev); bond_destroy(bond);
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index e1257e5..7b2015f 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c@@ -696,10 +696,8 @@ static void efx_stop_port(struct efx_nic *efx) /* Serialise against efx_set_multicast_list() */ if (efx_dev_registered(efx)) { - netif_tx_lock_bh(efx->net_dev); - netif_addr_lock(efx->net_dev); - netif_addr_unlock(efx->net_dev); - netif_tx_unlock_bh(efx->net_dev); + netif_addr_lock_bh(efx->net_dev); + netif_addr_unlock_bh(efx->net_dev); } }
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 87eb4e1..00238fd 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c@@ -757,11 +757,9 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file, /** Add the specified group to the character device's multicast filter * list. */ rtnl_lock(); - netif_tx_lock_bh(tun->dev); - netif_addr_lock(tun->dev); + netif_addr_lock_bh(tun->dev); add_multi(tun->chr_filter, ifr.ifr_hwaddr.sa_data); - netif_addr_unlock(tun->dev); - netif_tx_unlock_bh(tun->dev); + netif_addr_unlock_bh(tun->dev); rtnl_unlock(); DBG(KERN_DEBUG "%s: add multi: %s\n",
@@ -772,11 +770,9 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file, /** Remove the specified group from the character device's multicast * filter list. */ rtnl_lock(); - netif_tx_lock_bh(tun->dev); - netif_addr_lock(tun->dev); + netif_addr_lock_bh(tun->dev); del_multi(tun->chr_filter, ifr.ifr_hwaddr.sa_data); - netif_addr_unlock(tun->dev); - netif_tx_unlock_bh(tun->dev); + netif_addr_unlock_bh(tun->dev); rtnl_unlock(); DBG(KERN_DEBUG "%s: del multi: %s\n",
diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
index 42e9b27..14d5d61 100644
--- a/drivers/net/wireless/libertas/main.c
+++ b/drivers/net/wireless/libertas/main.c@@ -593,8 +593,7 @@ static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd, if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST)) return nr_addrs; - netif_tx_lock_bh(dev); - netif_addr_lock(dev); + netif_addr_lock_bh(dev); for (mc_list = dev->mc_list; mc_list; mc_list = mc_list->next) { if (mac_in_list(cmd->maclist, nr_addrs, mc_list->dmi_addr)) { lbs_deb_net("mcast address %s:%s skipped\n", dev->name,
@@ -609,8 +608,7 @@ static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd, print_mac(mac, mc_list->dmi_addr)); i++; } - netif_addr_unlock(dev); - netif_tx_unlock_bh(dev); + netif_addr_unlock_bh(dev); if (mc_list) return -EOVERFLOW;
diff --git a/net/core/dev.c b/net/core/dev.c
index 5f43ae0..1c54e39 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c@@ -2942,11 +2942,9 @@ void __dev_set_rx_mode(struct net_device *dev) void dev_set_rx_mode(struct net_device *dev) { - netif_tx_lock_bh(dev); - netif_addr_lock(dev); + netif_addr_lock_bh(dev); __dev_set_rx_mode(dev); - netif_addr_unlock(dev); - netif_tx_unlock_bh(dev); + netif_addr_unlock_bh(dev); } int __dev_addr_delete(struct dev_addr_list **list, int *count,
@@ -3024,13 +3022,11 @@ int dev_unicast_delete(struct net_device *dev, void *addr, int alen) ASSERT_RTNL(); - netif_tx_lock_bh(dev); - netif_addr_lock(dev); + netif_addr_lock_bh(dev); err = __dev_addr_delete(&dev->uc_list, &dev->uc_count, addr, alen, 0); if (!err) __dev_set_rx_mode(dev); - netif_addr_unlock(dev); - netif_tx_unlock_bh(dev); + netif_addr_unlock_bh(dev); return err; } EXPORT_SYMBOL(dev_unicast_delete);
@@ -3052,13 +3048,11 @@ int dev_unicast_add(struct net_device *dev, void *addr, int alen) ASSERT_RTNL(); - netif_tx_lock_bh(dev); - netif_addr_lock(dev); + netif_addr_lock_bh(dev); err = __dev_addr_add(&dev->uc_list, &dev->uc_count, addr, alen, 0); if (!err) __dev_set_rx_mode(dev); - netif_addr_unlock(dev); - netif_tx_unlock_bh(dev); + netif_addr_unlock_bh(dev); return err; } EXPORT_SYMBOL(dev_unicast_add);
@@ -3125,14 +3119,12 @@ int dev_unicast_sync(struct net_device *to, struct net_device *from) { int err = 0; - netif_tx_lock_bh(to); - netif_addr_lock(to); + netif_addr_lock_bh(to); err = __dev_addr_sync(&to->uc_list, &to->uc_count, &from->uc_list, &from->uc_count); if (!err) __dev_set_rx_mode(to); - netif_addr_unlock(to); - netif_tx_unlock_bh(to); + netif_addr_unlock_bh(to); return err; } EXPORT_SYMBOL(dev_unicast_sync);
@@ -3148,9 +3140,7 @@ EXPORT_SYMBOL(dev_unicast_sync); */ void dev_unicast_unsync(struct net_device *to, struct net_device *from) { - netif_tx_lock_bh(from); - netif_addr_lock(from); - netif_tx_lock_bh(to); + netif_addr_lock_bh(from); netif_addr_lock(to); __dev_addr_unsync(&to->uc_list, &to->uc_count,
@@ -3158,9 +3148,7 @@ void dev_unicast_unsync(struct net_device *to, struct net_device *from) __dev_set_rx_mode(to); netif_addr_unlock(to); - netif_tx_unlock_bh(to); - netif_addr_unlock(from); - netif_tx_unlock_bh(from); + netif_addr_unlock_bh(from); } EXPORT_SYMBOL(dev_unicast_unsync);
@@ -3180,8 +3168,7 @@ static void __dev_addr_discard(struct dev_addr_list **list) static void dev_addr_discard(struct net_device *dev) { - netif_tx_lock_bh(dev); - netif_addr_lock(dev); + netif_addr_lock_bh(dev); __dev_addr_discard(&dev->uc_list); dev->uc_count = 0;
@@ -3189,8 +3176,7 @@ static void dev_addr_discard(struct net_device *dev) __dev_addr_discard(&dev->mc_list); dev->mc_count = 0; - netif_addr_unlock(dev); - netif_tx_unlock_bh(dev); + netif_addr_unlock_bh(dev); } unsigned dev_get_flags(const struct net_device *dev)
diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
index b6b2a12..5402b3b 100644
--- a/net/core/dev_mcast.c
+++ b/net/core/dev_mcast.c@@ -72,8 +72,7 @@ int dev_mc_delete(struct net_device *dev, void *addr, int alen, int glbl) { int err; - netif_tx_lock_bh(dev); - netif_addr_lock(dev); + netif_addr_lock_bh(dev); err = __dev_addr_delete(&dev->mc_list, &dev->mc_count, addr, alen, glbl); if (!err) {
@@ -84,8 +83,7 @@ int dev_mc_delete(struct net_device *dev, void *addr, int alen, int glbl) __dev_set_rx_mode(dev); } - netif_addr_unlock(dev); - netif_tx_unlock_bh(dev); + netif_addr_unlock_bh(dev); return err; }
@@ -97,13 +95,11 @@ int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl) { int err; - netif_tx_lock_bh(dev); - netif_addr_lock(dev); + netif_addr_lock_bh(dev); err = __dev_addr_add(&dev->mc_list, &dev->mc_count, addr, alen, glbl); if (!err) __dev_set_rx_mode(dev); - netif_addr_unlock(dev); - netif_tx_unlock_bh(dev); + netif_addr_unlock_bh(dev); return err; }
@@ -123,14 +119,12 @@ int dev_mc_sync(struct net_device *to, struct net_device *from) { int err = 0; - netif_tx_lock_bh(to); - netif_addr_lock(to); + netif_addr_lock_bh(to); err = __dev_addr_sync(&to->mc_list, &to->mc_count, &from->mc_list, &from->mc_count); if (!err) __dev_set_rx_mode(to); - netif_addr_unlock(to); - netif_tx_unlock_bh(to); + netif_addr_unlock_bh(to); return err; }
@@ -149,9 +143,7 @@ EXPORT_SYMBOL(dev_mc_sync); */ void dev_mc_unsync(struct net_device *to, struct net_device *from) { - netif_tx_lock_bh(from); - netif_addr_lock(from); - netif_tx_lock_bh(to); + netif_addr_lock_bh(from); netif_addr_lock(to); __dev_addr_unsync(&to->mc_list, &to->mc_count,
@@ -159,9 +151,7 @@ void dev_mc_unsync(struct net_device *to, struct net_device *from) __dev_set_rx_mode(to); netif_addr_unlock(to); - netif_tx_unlock_bh(to); - netif_addr_unlock(from); - netif_tx_unlock_bh(from); + netif_addr_unlock_bh(from); } EXPORT_SYMBOL(dev_mc_unsync);
@@ -174,8 +164,7 @@ static int dev_mc_seq_show(struct seq_file *seq, void *v) if (v == SEQ_START_TOKEN) return 0; - netif_tx_lock_bh(dev); - netif_addr_lock(dev); + netif_addr_lock_bh(dev); for (m = dev->mc_list; m; m = m->next) { int i;
@@ -187,8 +176,7 @@ static int dev_mc_seq_show(struct seq_file *seq, void *v) seq_putc(seq, '\n'); } - netif_addr_unlock(dev); - netif_tx_unlock_bh(dev); + netif_addr_unlock_bh(dev); return 0; }
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 59fec7e..3041924 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c@@ -314,11 +314,9 @@ static int ieee80211_open(struct net_device *dev) if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) local->fif_other_bss++; - netif_tx_lock_bh(local->mdev); - netif_addr_lock(local->mdev); + netif_addr_lock_bh(local->mdev); ieee80211_configure_filter(local); - netif_addr_unlock(local->mdev); - netif_tx_unlock_bh(local->mdev); + netif_addr_unlock_bh(local->mdev); break; case IEEE80211_IF_TYPE_STA: case IEEE80211_IF_TYPE_IBSS:
@@ -510,11 +508,9 @@ static int ieee80211_stop(struct net_device *dev) if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) local->fif_other_bss--; - netif_tx_lock_bh(local->mdev); - netif_addr_lock(local->mdev); + netif_addr_lock_bh(local->mdev); ieee80211_configure_filter(local); - netif_addr_unlock(local->mdev); - netif_tx_unlock_bh(local->mdev); + netif_addr_unlock_bh(local->mdev); break; case IEEE80211_IF_TYPE_MESH_POINT: case IEEE80211_IF_TYPE_STA:
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 92d7b46..4817330 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c@@ -4047,16 +4047,14 @@ static int ieee80211_sta_start_scan(struct net_device *dev, local->scan_band = IEEE80211_BAND_2GHZ; local->scan_dev = dev; - netif_tx_lock_bh(local->mdev); - netif_addr_lock(local->mdev); + netif_addr_lock_bh(local->mdev); local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; local->ops->configure_filter(local_to_hw(local), FIF_BCN_PRBRESP_PROMISC, &local->filter_flags, local->mdev->mc_count, local->mdev->mc_list); - netif_addr_unlock(local->mdev); - netif_tx_unlock_bh(local->mdev); + netif_addr_unlock_bh(local->mdev); /* TODO: start scan as soon as all nullfunc frames are ACKed */ queue_delayed_work(local->hw.workqueue, &local->scan_work,
--
1.5.6