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


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

From 376c2c5f17f41d25e0da6c42544bd337b219af82 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 30 Jun 2015 14:12:42 +0100
Subject: [PATCH 097/148] 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
@@ -3262,6 +3262,8 @@ 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];