target/linux/brcm2708/patches-4.1/0097-serial-8250-Don-t-crash-when-nr_uarts-is-0.patch


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From 32560a31ee4fc921356d69d8dea4c271781b32df Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 30 Jun 2015 14:12:42 +0100
Subject: [PATCH 097/203] serial: 8250: Don't crash when nr_uarts is 0

---
 drivers/tty/serial/8250/8250_core.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -3270,6 +3270,8 @@ static void __init serial8250_isa_init_p
 
 	if (nr_uarts > UART_NR)
 		nr_uarts = UART_NR;
+	if (!nr_uarts)
+		return;
 
 	for (i = 0; i < nr_uarts; i++) {
 		struct uart_8250_port *up = &serial8250_ports[i];