[PATCH] smc911x: Re-release spinlock on spurious interrupt

The smc911x driver forgets to release the spinlock on spurious interrupts.
This little patch fixes it.

Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index d37bd86..0b15290 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -1092,6 +1092,7 @@
 	/* Spurious interrupt check */
 	if ((SMC_GET_IRQ_CFG() & (INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) !=
 		(INT_CFG_IRQ_INT_ | INT_CFG_IRQ_EN_)) {
+		spin_unlock_irqrestore(&lp->lock, flags);
 		return IRQ_NONE;
 	}