diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2013-09-18 21:05:20 -0700 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-09-20 00:37:10 +0200 |
| commit | 4dea5806d332f91d640d99943db99a5539e832c3 (patch) | |
| tree | d75223cd2f1abea323cae98f3b198e430d69da48 /drivers/cpufreq/cpufreq.c | |
| parent | e4a6a29d1250022a885123cc0a04bd176b508854 (diff) | |
| download | blackbird-obmc-linux-4dea5806d332f91d640d99943db99a5539e832c3.tar.gz blackbird-obmc-linux-4dea5806d332f91d640d99943db99a5539e832c3.zip | |
cpufreq: return EEXIST instead of EBUSY for second registering
On systems that support intel_pstate, acpi_cpufreq fails to load, and
udev keeps trying until trace gets filled up and kernel crashes.
The root cause is driver return ret from cpufreq_register_driver(),
because when some other driver takes over before, it will return
EBUSY and then udev will keep trying ...
cpufreq_register_driver() should return EEXIST instead so that the
system can boot without appending intel_pstate=disable and still use
intel_pstate.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 82ecbe39dfb0..89b3c52cd5c3 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2104,7 +2104,7 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data) 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); |
