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ANDROID: dummy_cpufreq: Implement get()

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Fixes panic in time_cpufreq_notifier+0x94 caused by notifying the x86
TSC synchronization code that a CPU frequency change has occurred, but
not properly updating policy->cur beforehand, causing a division by
zero.

Link: https://github.com/ClangBuiltLinux/linux/issues/756
Change-Id: I687093bbdb402a13341762bf9d91dd7f9daffe8b
Signed-off-by: Alistair Delva <adelva@google.com>
This commit is contained in:
Alistair Delva 2019-10-28 15:07:10 -07:00
parent 0ac91e9d33
commit 836f97c1e3
1 changed files with 6 additions and 0 deletions
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6
drivers/cpufreq/dummy-cpufreq.c
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@ -23,6 +23,11 @@ static int dummy_cpufreq_driver_init(struct cpufreq_policy *policy)
return 0; return 0;
} }
static unsigned int dummy_cpufreq_get(unsigned int cpu)
{
return 1;
}
static int dummy_cpufreq_verify(struct cpufreq_policy *policy) static int dummy_cpufreq_verify(struct cpufreq_policy *policy)
{ {
return 0; return 0;
@ -32,6 +37,7 @@ static struct cpufreq_driver dummy_cpufreq_driver = {
.name = "dummy", .name = "dummy",
.target_index = dummy_cpufreq_target_index, .target_index = dummy_cpufreq_target_index,
.init = dummy_cpufreq_driver_init, .init = dummy_cpufreq_driver_init,
.get = dummy_cpufreq_get,
.verify = dummy_cpufreq_verify, .verify = dummy_cpufreq_verify,
.attr = cpufreq_generic_attr, .attr = cpufreq_generic_attr,
}; };