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microblaze: Sane handling of missing timer/intc in device tree 

This code path doesn't test any returned pointers for NULL, leading to a bad
kernel page fault if there's no timer/intc found.

Slightly better is to BUG(), but even better still would be a printk beforehand.

Signed-off-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
John Williams 2009-07-29 22:08:40 +10:00 committed by Michal Simek
parent 6b99ecec25
commit 892ee92b81
2 changed files with 4 additions and 0 deletions
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2
arch/microblaze/kernel/intc.c
View File

@ -12,6 +12,7 @@
#include <linux/irq.h>
#include <asm/page.h>
#include <linux/io.h>
#include <linux/bug.h>
#include <asm/prom.h>
#include <asm/irq.h>
@ -130,6 +131,7 @@ void __init init_IRQ(void)
if (intc)
break;
}
BUG_ON(!intc);
intc_baseaddr = *(int *) of_get_property(intc, "reg", NULL);
intc_baseaddr = (unsigned long) ioremap(intc_baseaddr, PAGE_SIZE);

2
arch/microblaze/kernel/timer.c
View File

@ -22,6 +22,7 @@
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/io.h>
#include <linux/bug.h>
#include <asm/cpuinfo.h>
#include <asm/setup.h>
#include <asm/prom.h>
@ -234,6 +235,7 @@ void __init time_init(void)
if (timer)
break;
}
BUG_ON(!timer);
timer_baseaddr = *(int *) of_get_property(timer, "reg", NULL);
timer_baseaddr = (unsigned long) ioremap(timer_baseaddr, PAGE_SIZE);