1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c
index 5f283529620b..34f3c7e2d832 100644
--- a/drivers/macintosh/smu.c
+++ b/drivers/macintosh/smu.c
@@ -153,8 +153,10 @@ static irqreturn_t smu_db_intr(int irq, void *arg, struct pt_regs *regs)
         spin_lock_irqsave(&smu->lock, flags);
 
         gpio = pmac_do_feature_call(PMAC_FTR_READ_GPIO, NULL, smu->doorbell);
-        if ((gpio & 7) != 7)
+        if ((gpio & 7) != 7) {
+                spin_unlock_irqrestore(&smu->lock, flags);
                 return IRQ_HANDLED;
+        }
 
         cmd = smu->cmd_cur;
         smu->cmd_cur = NULL;