System that cpu support intel_pstate, acpi_cpufreq fail to
load, and udev keep trying until trace get filled up and
kernel crash.
The root cause is driver return ret from cpufreq_register_driver
and when some other driver take over before, it would return
EBUSY, then udev will keep trying...
cpufreq_register_driver should return EEXIST instead.
then system could boot without appending intel_pstate=disable
and still use intel_pstate.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
drivers/cpufreq/cpufreq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-2.6/drivers/cpufreq/cpufreq.c
===================================================================
--- linux-2.6.orig/drivers/cpufreq/cpufreq.c
+++ linux-2.6/drivers/cpufreq/cpufreq.c
@@ -2104,7 +2104,7 @@ int cpufreq_register_driver(struct cpufr
write_lock_irqsave(&cpufreq_driver_lock, flags);
if (cpufreq_driver) {
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
- return -EBUSY;
+ return -EEXIST;
}
cpufreq_driver = driver_data;
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
--
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