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| author | Dirk Brandewie <dirk.j.brandewie@intel.com> | 2013-01-17 16:22:21 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-02-02 00:01:14 +0100 |
| commit | d5aaffa9dd531c978c6f3fea06a2972653bd7fc8 (patch) | |
| tree | 4ce3e3de25daaaf25b5fa09f4596314b3b68de4d /drivers/cpufreq/cpufreq.c | |
| parent | b8eed8af94f9203e0cc39245ea335f4b8dc1ed31 (diff) | |
| download | linux-d5aaffa9dd531c978c6f3fea06a2972653bd7fc8.tar.bz2 | |
cpufreq: handle cpufreq being disabled for all exported function.
When disable_cpufreq() is called some exported functions are still
being used that do not have a check for cpufreq being disabled.
Add a disabled check into cpufreq_cpu_get() to return NULL if
cpufreq is disabled this covers most of the exported functions. For
the exported functions that do not call cpufreq_cpu_get() add an
explicit check.
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
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 | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 9af14a8bbcdb..2417576393a6 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -183,6 +183,9 @@ err_out: struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) { + if (cpufreq_disabled()) + return NULL; + return __cpufreq_cpu_get(cpu, false); } EXPORT_SYMBOL_GPL(cpufreq_cpu_get); @@ -201,6 +204,9 @@ static void __cpufreq_cpu_put(struct cpufreq_policy *data, bool sysfs) void cpufreq_cpu_put(struct cpufreq_policy *data) { + if (cpufreq_disabled()) + return; + __cpufreq_cpu_put(data, false); } EXPORT_SYMBOL_GPL(cpufreq_cpu_put); @@ -267,6 +273,9 @@ void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state) BUG_ON(irqs_disabled()); + if (cpufreq_disabled()) + return; + freqs->flags = cpufreq_driver->flags; pr_debug("notification %u of frequency transition to %u kHz\n", state, freqs->new); @@ -1408,6 +1417,9 @@ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list) { int ret; + if (cpufreq_disabled()) + return -EINVAL; + WARN_ON(!init_cpufreq_transition_notifier_list_called); switch (list) { @@ -1442,6 +1454,9 @@ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list) { int ret; + if (cpufreq_disabled()) + return -EINVAL; + switch (list) { case CPUFREQ_TRANSITION_NOTIFIER: ret = srcu_notifier_chain_unregister( @@ -1522,6 +1537,9 @@ int __cpufreq_driver_getavg(struct cpufreq_policy *policy, unsigned int cpu) { int ret = 0; + if (cpufreq_disabled()) + return ret; + if (!(cpu_online(cpu) && cpufreq_driver->getavg)) return 0; |