[patch 14/14] netdrvr: atl1e: Dont take the mdio_lock inatl1e_probe

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us
know.

------------------
From: Matthew Wilcox <matthew@xxxxxx>

commit f382a0a8e9403c6d7f8b2cfa21e41fefb5d0c9bd upstream

Lockdep warns about the mdio_lock taken with interrupts enabled then later
taken from interrupt context.  Initially, I considered changing these
to spin_lock_irq/spin_unlock_irq, but then I looked at atl1e_phy_init()
and saw that it calls msleep().  Sleeping while holding a spinlock is
not allowed either.

In the probe path, we haven't registered the interrupt handler, so
it can't poke at this card yet.  It's before we call register_netdev(),
so I don't think any other threads can reach this card either.  If I'm
right, we don't need a spinlock at all.

Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx>
Cc: Jay Cliburn <jacliburn@xxxxxxxxxxxxx>
Signed-off-by: Jeff Garzik <jgarzik@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/net/atl1e/atl1e_main.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/net/atl1e/atl1e_main.c
+++ b/drivers/net/atl1e/atl1e_main.c
@@ -2390,9 +2390,7 @@ static int __devinit atl1e_probe(struct 
 	}
 
 	/* Init GPHY as early as possible due to power saving issue  */
-	spin_lock(&adapter->mdio_lock);
 	atl1e_phy_init(&adapter->hw);
-	spin_unlock(&adapter->mdio_lock);
 	/* reset the controller to
 	 * put the device in a known good starting state */
 	err = atl1e_reset_hw(&adapter->hw);

-- 
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