diff --git a/[refs] b/[refs]
index a41fba4eb5c0..90523484ef3f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 98bcef56cadb4da138e2c1a2a0790f372382b236
+refs/heads/master: 0400b697ef20247d26427e4beb6a84ca5aa51f45
diff --git a/trunk/drivers/serial/atmel_serial.c b/trunk/drivers/serial/atmel_serial.c
index fad245b064d6..d57bf3e708d8 100644
--- a/trunk/drivers/serial/atmel_serial.c
+++ b/trunk/drivers/serial/atmel_serial.c
@@ -549,7 +549,7 @@ static irqreturn_t atmel_interrupt(int irq, void *dev_id)
 		atmel_handle_transmit(port, pending);
 	} while (pass_counter++ < ATMEL_ISR_PASS_LIMIT);
 
-	return IRQ_HANDLED;
+	return pass_counter ? IRQ_HANDLED : IRQ_NONE;
 }
 
 /*