From: Rafael J. Wysocki rafael.j.wysocki@intel.com
commit f5739cb0b56590d68d8df8a44659893b6d0084c3 upstream.
Before commit 1e4f63aecb53 ("cpufreq: Avoid creating excessively large stack frames") the initial value of the policy field in struct cpufreq_policy set by the driver's ->init() callback was implicitly passed from cpufreq_init_policy() to cpufreq_set_policy() if the default governor was neither "performance" nor "powersave". After that commit, however, cpufreq_init_policy() must take that case into consideration explicitly and handle it as appropriate, so make that happen.
Fixes: 1e4f63aecb53 ("cpufreq: Avoid creating excessively large stack frames") Link: https://lore.kernel.org/linux-pm/39fb762880c27da110086741315ca8b111d781cd.ca... Reported-by: Artem Bityutskiy dedekind1@gmail.com Cc: 5.4+ stable@vger.kernel.org # 5.4+ Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Acked-by: Viresh Kumar viresh.kumar@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/cpufreq/cpufreq.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
--- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1074,9 +1074,17 @@ static int cpufreq_init_policy(struct cp pol = policy->last_policy; } else if (def_gov) { pol = cpufreq_parse_policy(def_gov->name); - } else { - return -ENODATA; + /* + * In case the default governor is neiter "performance" + * nor "powersave", fall back to the initial policy + * value set by the driver. + */ + if (pol == CPUFREQ_POLICY_UNKNOWN) + pol = policy->policy; } + if (pol != CPUFREQ_POLICY_PERFORMANCE && + pol != CPUFREQ_POLICY_POWERSAVE) + return -ENODATA; }
return cpufreq_set_policy(policy, gov, pol);