Messages in this thread Patch in this message |  | | From | Perry Yuan <> | Subject | [PATCH v8 04/13] cpufreq: amd-pstate: fix kernel hang issue while amd-pstate unregistering | Date | Mon, 19 Dec 2022 14:40:33 +0800 |
| |
In the amd_pstate_adjust_perf(), there is one cpufreq_cpu_get() call to increase increments the kobject reference count of policy and make it as busy. Therefore, a corresponding call to cpufreq_cpu_put() is needed to decrement the kobject reference count back, it will resolve the kernel hang issue when unregistering the amd-pstate driver and register the `amd_pstate_epp` driver instance.
Signed-off-by: Perry Yuan <perry.yuan@amd.com> Acked-by: Huang Rui <ray.huang@amd.com> --- drivers/cpufreq/amd-pstate.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 204e39006dda..c17bd845f5fc 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -307,6 +307,7 @@ static void amd_pstate_adjust_perf(unsigned int cpu, max_perf = min_perf; amd_pstate_update(cpudata, min_perf, des_perf, max_perf, true); + cpufreq_cpu_put(policy); } static int amd_get_min_freq(struct amd_cpudata *cpudata) -- 2.34.1
|  |