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;
 	}