diff options
| author | Ilkka Virta <itvirta@iki.fi> | 2009-02-07 07:00:36 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-02-07 07:00:36 +0100 |
| commit | 71822faa3bc0af5dbf5e333a2d085f1ed7cd809f (patch) | |
| tree | b0ad50f98ee521de666f595ec4d33b430f39a80c /drivers | |
| parent | RxRPC: Fix a potential NULL dereference (diff) | |
| download | linux-71822faa3bc0af5dbf5e333a2d085f1ed7cd809f.tar.xz linux-71822faa3bc0af5dbf5e333a2d085f1ed7cd809f.zip | |
sungem: Soft lockup in sungem on Netra AC200 when switching interface up
From: Ilkka Virta <itvirta@iki.fi>
In the lockup situation the driver seems to go off in an eternal storm
of interrupts right after calling request_irq(). It doesn't actually
do anything interesting in the interrupt handler. Since connecting the link
afterwards works, something later in initialization must fix this.
Looking at gem_do_start() and gem_open(), it seems that the only thing
done while opening the device after the request_irq(), is a call to
napi_enable().
I don't know what the ordering requirements are for the
initialization, but I boldly tried to move the napi_enable() call
inside gem_do_start() before the link state is checked and interrupts
subsequently enabled, and it seems to work for me. Doesn't even break
anything too obvious...
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/sungem.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/sungem.c b/drivers/net/sungem.c index b17efa9cc530..491876341068 100644 --- a/drivers/net/sungem.c +++ b/drivers/net/sungem.c @@ -2221,6 +2221,8 @@ static int gem_do_start(struct net_device *dev) gp->running = 1; + napi_enable(&gp->napi); + if (gp->lstate == link_up) { netif_carrier_on(gp->dev); gem_set_link_modes(gp); @@ -2238,6 +2240,8 @@ static int gem_do_start(struct net_device *dev) spin_lock_irqsave(&gp->lock, flags); spin_lock(&gp->tx_lock); + napi_disable(&gp->napi); + gp->running = 0; gem_reset(gp); gem_clean_rings(gp); @@ -2338,8 +2342,6 @@ static int gem_open(struct net_device *dev) if (!gp->asleep) rc = gem_do_start(dev); gp->opened = (rc == 0); - if (gp->opened) - napi_enable(&gp->napi); mutex_unlock(&gp->pm_mutex); @@ -2476,8 +2478,6 @@ static int gem_resume(struct pci_dev *pdev) /* Re-attach net device */ netif_device_attach(dev); - - napi_enable(&gp->napi); } spin_lock_irqsave(&gp->lock, flags); |