From 60158e64641fd8c780a6d14de2bf42aabc419916 Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Mon, 30 Apr 2012 07:15:47 +0000 Subject: [PATCH] cxgb3: Don't call cxgb_vlan_mode until q locks are initialized The driver calls cxgb_vlan_mode() from init_one(). This calls into synchronize_rx(), which locks all the q locks, but the q locks are not initialized until cxgb_up() -> setup_sge_qsets(). So move the call to cxgb_vlan_mode() into cxgb_up(), after the call to setup_sge_qsets(). We also move the body of these functions up higher to avoid having to a forward declaration. This was found because of the lockdep warning: INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. Pid: 323, comm: work_for_cpu Not tainted 3.4.0-rc5 #28 Call Trace: [] register_lock_class+0x108/0x2d0 [] __lock_acquire+0xd3/0xd06 [] lock_acquire+0xbf/0xfe [] _raw_spin_lock_irq+0x36/0x45 [] cxgb_vlan_mode+0x96/0xcb [cxgb3] [] init_one+0x8c4/0x980 [cxgb3] [] local_pci_probe+0x3f/0x70 [] do_work_for_cpu+0x10/0x22 [] kthread+0xa1/0xa9 [] kernel_thread_helper+0x4/0x10 Contrary to what lockdep says, the code is not fine: we are locking an uninitialized spinlock. Signed-off-by: Roland Dreier Signed-off-by: David S. Miller --- .../net/ethernet/chelsio/cxgb3/cxgb3_main.c | 92 +++++++++---------- 1 file changed, 46 insertions(+), 46 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c index 63bfdd10bd6d..abb6ce7c1b7e 100644 --- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c +++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c @@ -1149,6 +1149,48 @@ release_tpsram: return ret; } +/** + * t3_synchronize_rx - wait for current Rx processing on a port to complete + * @adap: the adapter + * @p: the port + * + * Ensures that current Rx processing on any of the queues associated with + * the given port completes before returning. We do this by acquiring and + * releasing the locks of the response queues associated with the port. + */ +static void t3_synchronize_rx(struct adapter *adap, const struct port_info *p) +{ + int i; + + for (i = p->first_qset; i < p->first_qset + p->nqsets; i++) { + struct sge_rspq *q = &adap->sge.qs[i].rspq; + + spin_lock_irq(&q->lock); + spin_unlock_irq(&q->lock); + } +} + +static void cxgb_vlan_mode(struct net_device *dev, netdev_features_t features) +{ + struct port_info *pi = netdev_priv(dev); + struct adapter *adapter = pi->adapter; + + if (adapter->params.rev > 0) { + t3_set_vlan_accel(adapter, 1 << pi->port_id, + features & NETIF_F_HW_VLAN_RX); + } else { + /* single control for all ports */ + unsigned int i, have_vlans = features & NETIF_F_HW_VLAN_RX; + + for_each_port(adapter, i) + have_vlans |= + adapter->port[i]->features & NETIF_F_HW_VLAN_RX; + + t3_set_vlan_accel(adapter, 1, have_vlans); + } + t3_synchronize_rx(adapter, pi); +} + /** * cxgb_up - enable the adapter * @adapter: adapter being enabled @@ -1161,7 +1203,7 @@ release_tpsram: */ static int cxgb_up(struct adapter *adap) { - int err; + int i, err; if (!(adap->flags & FULL_INIT_DONE)) { err = t3_check_fw_version(adap); @@ -1198,6 +1240,9 @@ static int cxgb_up(struct adapter *adap) if (err) goto out; + for_each_port(adap, i) + cxgb_vlan_mode(adap->port[i], adap->port[i]->features); + setup_rss(adap); if (!(adap->flags & NAPI_INIT)) init_napi(adap); @@ -2508,48 +2553,6 @@ static int cxgb_set_mac_addr(struct net_device *dev, void *p) return 0; } -/** - * t3_synchronize_rx - wait for current Rx processing on a port to complete - * @adap: the adapter - * @p: the port - * - * Ensures that current Rx processing on any of the queues associated with - * the given port completes before returning. We do this by acquiring and - * releasing the locks of the response queues associated with the port. - */ -static void t3_synchronize_rx(struct adapter *adap, const struct port_info *p) -{ - int i; - - for (i = p->first_qset; i < p->first_qset + p->nqsets; i++) { - struct sge_rspq *q = &adap->sge.qs[i].rspq; - - spin_lock_irq(&q->lock); - spin_unlock_irq(&q->lock); - } -} - -static void cxgb_vlan_mode(struct net_device *dev, netdev_features_t features) -{ - struct port_info *pi = netdev_priv(dev); - struct adapter *adapter = pi->adapter; - - if (adapter->params.rev > 0) { - t3_set_vlan_accel(adapter, 1 << pi->port_id, - features & NETIF_F_HW_VLAN_RX); - } else { - /* single control for all ports */ - unsigned int i, have_vlans = features & NETIF_F_HW_VLAN_RX; - - for_each_port(adapter, i) - have_vlans |= - adapter->port[i]->features & NETIF_F_HW_VLAN_RX; - - t3_set_vlan_accel(adapter, 1, have_vlans); - } - t3_synchronize_rx(adapter, pi); -} - static netdev_features_t cxgb_fix_features(struct net_device *dev, netdev_features_t features) { @@ -3353,9 +3356,6 @@ static int __devinit init_one(struct pci_dev *pdev, err = sysfs_create_group(&adapter->port[0]->dev.kobj, &cxgb3_attr_group); - for_each_port(adapter, i) - cxgb_vlan_mode(adapter->port[i], adapter->port[i]->features); - print_port_info(adapter, ai); return 0; -- 2.20.1