--- zzzz-none-000/linux-3.10.107/drivers/tty/serial/8250/8250_fsl.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/tty/serial/8250/8250_fsl.c	2021-02-04 17:41:59.000000000 +0000
@@ -28,8 +28,7 @@
 	unsigned char lsr, orig_lsr;
 	unsigned long flags;
 	unsigned int iir;
-	struct uart_8250_port *up =
-		container_of(port, struct uart_8250_port, port);
+	struct uart_8250_port *up = up_to_u8250p(port);
 
 	spin_lock_irqsave(&up->port.lock, flags);
 
@@ -61,3 +60,4 @@
 	spin_unlock_irqrestore(&up->port.lock, flags);
 	return 1;
 }
+EXPORT_SYMBOL_GPL(fsl8250_handle_irq);