[PATCH 2/5] smc911x: Early exit from isr with spinlock held

Fixes an early return from the interrupt handler on a spurious 
interrupt without releasing a lock.

Signed-off-by: Jason Borg <redacted>
---
Note, I thought I'd mention that I noticed a patch with this
same fix in 2.6.18-rc4-mm2.

diff -uprN linux-2.6.18-rc4-orig/drivers/net/smc911x.c linux-2.6.18-rc4/drivers/net/smc911x.c

--- linux-2.6.18-rc4-orig/drivers/net/smc911x.c	2006-08-22 15:39:24.200701014 -0400
+++ linux-2.6.18-rc4/drivers/net/smc911x.c	2006-08-22 15:39:54.778193514 -0400

@@ -1092,6 +1092,7 @@ static irqreturn_t smc911x_interrupt(int
 	/* 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;
 	}