From 22747d6b41f31c71abc2b351bc9f6bfa6bae5d5e Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Thu, 15 Feb 2007 23:37:50 +0100 Subject: s2io: RTNL and flush_scheduled_work deadlock Mantra: don't use flush_scheduled_work with RTNL held. Signed-off-by: Francois Romieu Signed-off-by: Jeff Garzik --- drivers/net/s2io.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c index e8e0d94e9bdd..fd85648d98d1 100644 --- a/drivers/net/s2io.c +++ b/drivers/net/s2io.c @@ -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); -- cgit v1.2.2