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net: bcmgenet: avoid unbalanced enable_irq_wake calls
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Multiple enable_irq_wake() calls will keep increasing the IRQ
wake_depth, which ultimately leads to the following types of
situation:

1) enable Wake-on-LAN interrupt w/o password
2) enable Wake-on-LAN interrupt w/ password
3) enable Wake-on-LAN interrupt w/o password
4) disable Wake-on-LAN interrupt

After step 4), GENET would always wake-up the system no matter what
wake-up device we use, which is not what we want. Fix this by making
sure there are no unbalanced enable_irq_wake() calls.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Florian Fainelli authored and David S. Miller committed Oct 10, 2014
1 parent cf377d8 commit 083731a
Showing 1 changed file with 3 additions and 1 deletion.
4 changes: 3 additions & 1 deletion drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c
Original file line number Diff line number Diff line change
Expand Up @@ -86,7 +86,9 @@ int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
/* Flag the device and relevant IRQ as wakeup capable */
if (wol->wolopts) {
device_set_wakeup_enable(kdev, 1);
enable_irq_wake(priv->wol_irq);
/* Avoid unbalanced enable_irq_wake calls */
if (priv->wol_irq_disabled)
enable_irq_wake(priv->wol_irq);
priv->wol_irq_disabled = false;
} else {
device_set_wakeup_enable(kdev, 0);
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