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authorThomas Renninger <trenn@suse.de>2006-02-01 11:38:37 +0100
committerDave Jones <davej@redhat.com>2006-02-02 16:51:44 -0500
commit9d2725bb815d915fc6c8531097d9e71b579a8763 (patch)
tree0183fb3860cef820a15b5f66ca5d574918c16640 /arch
parente4472cb3706ceea42797ae1dc79d624026986694 (diff)
downloadop-kernel-dev-9d2725bb815d915fc6c8531097d9e71b579a8763.zip
op-kernel-dev-9d2725bb815d915fc6c8531097d9e71b579a8763.tar.gz
[CPUFREQ] Check for not initialized freq on cpufreq changes
Test for old_freq equals 0 to insure not to divide by 0: ______________________________________________ Check for not initialized freq on cpufreq changes Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/kernel/timers/timer_tsc.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/i386/kernel/timers/timer_tsc.c b/arch/i386/kernel/timers/timer_tsc.c
index 47675bb..591a642 100644
--- a/arch/i386/kernel/timers/timer_tsc.c
+++ b/arch/i386/kernel/timers/timer_tsc.c
@@ -272,6 +272,10 @@ time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
if (val != CPUFREQ_RESUMECHANGE)
write_seqlock_irq(&xtime_lock);
if (!ref_freq) {
+ if (!freq->old){
+ ref_freq = freq->new;
+ goto end;
+ }
ref_freq = freq->old;
loops_per_jiffy_ref = cpu_data[freq->cpu].loops_per_jiffy;
#ifndef CONFIG_SMP
@@ -297,6 +301,7 @@ time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
#endif
}
+end:
if (val != CPUFREQ_RESUMECHANGE)
write_sequnlock_irq(&xtime_lock);
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