diff --git a/drivers/staging/greybus/operation.c b/drivers/staging/greybus/operation.c
index 75900d3129be..aaac03733fd4 100644
--- a/drivers/staging/greybus/operation.c
+++ b/drivers/staging/greybus/operation.c
@@ -265,11 +265,10 @@ static void gb_operation_work(struct work_struct *work)
 	struct gb_operation *operation;
 
 	operation = container_of(work, struct gb_operation, work);
-	if (WARN_ON(!operation->callback))
-		return;
-
-	operation->callback(operation);
-	operation->callback = NULL;
+	if (operation->callback) {
+		operation->callback(operation);
+		operation->callback = NULL;
+	}
 	gb_operation_put(operation);
 }