diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 6376b4a598d35247b0c0f95d645e5f319f1d744c..29d6f520a9fb99a7a03a82a5135c47321acf493f 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -154,8 +154,9 @@ static ssize_t write_irq_affinity(int type, struct file *file,
 		 */
 		err = irq_select_affinity_usr(irq) ? -EINVAL : count;
 	} else {
-		irq_set_affinity(irq, new_value);
-		err = count;
+		err = irq_set_affinity(irq, new_value);
+		if (!err)
+			err = count;
 	}
 
 free_cpumask: