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authorJohn Williams <john.williams@petalogix.com>2009-07-29 22:08:40 +1000
committerMichal Simek <monstr@monstr.eu>2009-08-18 10:33:30 +0200
commit892ee92b81b6e7fa5f6147c96e11c6c1b9802fc6 (patch)
tree8ae8086fe126192fb4fd68a37811db24599048a3 /arch/microblaze/kernel/timer.c
parent6b99ecec25c8fd501e74306f5d23dd0365065e2a (diff)
downloadlinux-892ee92b81b6e7fa5f6147c96e11c6c1b9802fc6.tar.bz2
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>
Diffstat (limited to 'arch/microblaze/kernel/timer.c')
-rw-r--r--arch/microblaze/kernel/timer.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index bdfa2f9f0c81..5499deae7fa6 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -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);