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s2io: RTNL and flush_scheduled_work deadlock 

Mantra: don't use flush_scheduled_work with RTNL held.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
hifive-unleashed-5.1
Francois Romieu 2007-02-15 23:37:50 +01:00 committed by Jeff Garzik
parent 83cbb4d257
commit 22747d6b41
1 changed files with 18 additions and 3 deletions
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21
drivers/net/s2io.c
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@ -3758,7 +3758,6 @@ static int s2io_close(struct net_device *dev)
{
struct s2io_nic *sp = dev->priv;
flush_scheduled_work();
netif_stop_queue(dev);
/* Reset card, kill tasklet and free Tx and Rx buffers. */
s2io_card_down(sp);
@ -5847,9 +5846,14 @@ static void s2io_set_link(struct work_struct *work)
register u64 val64;
u16 subid;
rtnl_lock();
if (!netif_running(dev))
goto out_unlock;
if (test_and_set_bit(0, &(nic->link_state))) {
/* The card is being reset, no point doing anything */
return;
goto out_unlock;
}
subid = nic->pdev->subsystem_device;
@ -5903,6 +5907,9 @@ static void s2io_set_link(struct work_struct *work)
s2io_link(nic, LINK_DOWN);
}
clear_bit(0, &(nic->link_state));
out_unlock:
rtnl_lock();
}
static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp,
@ -6356,6 +6363,11 @@ static void s2io_restart_nic(struct work_struct *work)
struct s2io_nic *sp = container_of(work, struct s2io_nic, rst_timer_task);
struct net_device *dev = sp->dev;
rtnl_lock();
if (!netif_running(dev))
goto out_unlock;
s2io_card_down(sp);
if (s2io_card_up(sp)) {
DBG_PRINT(ERR_DBG, "%s: Device bring up failed\n",
@ -6364,7 +6376,8 @@ static void s2io_restart_nic(struct work_struct *work)
netif_wake_queue(dev);
DBG_PRINT(ERR_DBG, "%s: was reset by Tx watchdog timer\n",
dev->name);
out_unlock:
rtnl_unlock();
}
/**
@ -7173,6 +7186,8 @@ static void __devexit s2io_rem_nic(struct pci_dev *pdev)
return;
}
flush_scheduled_work();
sp = dev->priv;
unregister_netdev(dev);