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cpufreq/amd-pstate: Fix cpufreq_policy ref counting

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amd_pstate_update_limits() takes a cpufreq_policy reference but doesn't
decrement the refcount in one of the exit paths, fix that.

Fixes: 45722e777f ("cpufreq: amd-pstate: Optimize amd_pstate_update_limits()")
Signed-off-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20250205112523.201101-10-dhananjay.ugwekar@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
This commit is contained in:
Dhananjay Ugwekar 2025-02-05 11:25:20 +00:00 • committed by Mario Limonciello
parent 55db9b73c3
commit 3ace20038e
1 changed files with 5 additions and 4 deletions
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9
drivers/cpufreq/amd-pstate.c
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@ -821,20 +821,21 @@ static void amd_pstate_init_prefcore(struct amd_cpudata *cpudata)
static void amd_pstate_update_limits(unsigned int cpu) static void amd_pstate_update_limits(unsigned int cpu)
{ {
struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); struct cpufreq_policy *policy = NULL;
struct amd_cpudata *cpudata; struct amd_cpudata *cpudata;
u32 prev_high = 0, cur_high = 0; u32 prev_high = 0, cur_high = 0;
int ret; int ret;
bool highest_perf_changed = false; bool highest_perf_changed = false;
if (!amd_pstate_prefcore)
return;
policy = cpufreq_cpu_get(cpu);
if (!policy) if (!policy)
return; return;
cpudata = policy->driver_data; cpudata = policy->driver_data;
if (!amd_pstate_prefcore)
return;
guard(mutex)(&amd_pstate_driver_lock); guard(mutex)(&amd_pstate_driver_lock);
ret = amd_get_highest_perf(cpu, &cur_high); ret = amd_get_highest_perf(cpu, &cur_high);