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cpufreq: cpufreq_register_driver() should return -ENODEV if init fails 

commit 6c77003677 upstream.

For a driver that does not set the CPUFREQ_STICKY flag, if all of the
->init() calls fail, cpufreq_register_driver() should return an error.
This will prevent the driver from loading.

Fixes: ce1bcfe94d (cpufreq: check cpufreq_policy_list instead of scanning policies for all CPUs)
Signed-off-by: David Arcari <darcari@redhat.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
steinar/wifi_calib_4_9_kernel
David Arcari 2017-05-26 11:37:31 -04:00 committed by Greg Kroah-Hartman
parent acd8f91739
commit 96d7b43b42
1 changed files with 1 additions and 0 deletions
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drivers/cpufreq/cpufreq.c
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@ -2474,6 +2474,7 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
if (!(cpufreq_driver->flags & CPUFREQ_STICKY) &&
list_empty(&cpufreq_policy_list)) {
/* if all ->init() calls failed, unregister */
ret = -ENODEV;
pr_debug("%s: No CPU initialized for driver %s\n", __func__,
driver_data->name);
goto err_if_unreg;