greybus: operation: clean up create-incoming error path

Clean up gb_operation_create_incoming error path by returning
immediately on allocation failures.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/operation.c

@@ -511,10 +511,11 @@ gb_operation_create_incoming(struct gb_connection *connection, u16 id,
 
 	operation = gb_operation_create_common(connection, type,
 					request_size, 0, flags, GFP_ATOMIC);
-	if (operation) {
+	if (!operation)
+		return NULL;
+
 	operation->id = id;
 	memcpy(operation->request->header, data, size);
-	}
 
 	return operation;
 }