diff options
| author | Casey Leedom <leedom@chelsio.com> | 2010-09-02 13:07:32 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-03 10:03:51 -0700 |
| commit | 55bc3228ccef255041d697fe55dcc7fe4b37feb6 (patch) | |
| tree | 0a0e969d3617b63d5c924d0c1ba885488e7e6844 /drivers/net/cxgb3 | |
| parent | aa476321022ac6c3cb8ebfd1736555ccf61da276 (diff) | |
| download | linux-55bc3228ccef255041d697fe55dcc7fe4b37feb6.tar.bz2 | |
cxgb3: Avoid flush_workqueue() deadlock.
Don't call flush_workqueue() on the cxgb3 Work Queue in cxgb_down() when
we're being called from the fatal error task ... which is executing on the
cxgb3 Work Queue.
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/cxgb3')
| -rw-r--r-- | drivers/net/cxgb3/cxgb3_main.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c index ad19585d960b..1ecf53dafe06 100644 --- a/drivers/net/cxgb3/cxgb3_main.c +++ b/drivers/net/cxgb3/cxgb3_main.c @@ -1286,7 +1286,7 @@ irq_err: /* * Release resources when all the ports and offloading have been stopped. */ -static void cxgb_down(struct adapter *adapter) +static void cxgb_down(struct adapter *adapter, int on_wq) { t3_sge_stop(adapter); spin_lock_irq(&adapter->work_lock); /* sync with PHY intr task */ @@ -1296,7 +1296,8 @@ static void cxgb_down(struct adapter *adapter) free_irq_resources(adapter); quiesce_rx(adapter); t3_sge_stop(adapter); - flush_workqueue(cxgb3_wq); /* wait for external IRQ handler */ + if (!on_wq) + flush_workqueue(cxgb3_wq);/* wait for external IRQ handler */ } static void schedule_chk_task(struct adapter *adap) @@ -1374,7 +1375,7 @@ static int offload_close(struct t3cdev *tdev) clear_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map); if (!adapter->open_device_map) - cxgb_down(adapter); + cxgb_down(adapter, 0); cxgb3_offload_deactivate(adapter); return 0; @@ -1409,7 +1410,7 @@ static int cxgb_open(struct net_device *dev) return 0; } -static int cxgb_close(struct net_device *dev) +static int __cxgb_close(struct net_device *dev, int on_wq) { struct port_info *pi = netdev_priv(dev); struct adapter *adapter = pi->adapter; @@ -1436,12 +1437,17 @@ static int cxgb_close(struct net_device *dev) cancel_delayed_work_sync(&adapter->adap_check_task); if (!adapter->open_device_map) - cxgb_down(adapter); + cxgb_down(adapter, on_wq); cxgb3_event_notify(&adapter->tdev, OFFLOAD_PORT_DOWN, pi->port_id); return 0; } +static int cxgb_close(struct net_device *dev) +{ + return __cxgb_close(dev, 0); +} + static struct net_device_stats *cxgb_get_stats(struct net_device *dev) { struct port_info *pi = netdev_priv(dev); @@ -2862,7 +2868,7 @@ void t3_os_link_fault_handler(struct adapter *adapter, int port_id) spin_unlock(&adapter->work_lock); } -static int t3_adapter_error(struct adapter *adapter, int reset) +static int t3_adapter_error(struct adapter *adapter, int reset, int on_wq) { int i, ret = 0; @@ -2877,7 +2883,7 @@ static int t3_adapter_error(struct adapter *adapter, int reset) struct net_device *netdev = adapter->port[i]; if (netif_running(netdev)) - cxgb_close(netdev); + __cxgb_close(netdev, on_wq); } /* Stop SGE timers */ @@ -2948,7 +2954,7 @@ static void fatal_error_task(struct work_struct *work) int err = 0; rtnl_lock(); - err = t3_adapter_error(adapter, 1); + err = t3_adapter_error(adapter, 1, 1); if (!err) err = t3_reenable_adapter(adapter); if (!err) @@ -2998,7 +3004,7 @@ static pci_ers_result_t t3_io_error_detected(struct pci_dev *pdev, if (state == pci_channel_io_perm_failure) return PCI_ERS_RESULT_DISCONNECT; - ret = t3_adapter_error(adapter, 0); + ret = t3_adapter_error(adapter, 0, 0); /* Request a slot reset. */ return PCI_ERS_RESULT_NEED_RESET; |