cpufreq: CPPC: Factor out cppc_fie_kworker_init()

Factor out the CPPC FIE kworker init in cppc_freq_invariance_init() because
it's a standalone procedure for use when the CPC regs are in PCC channels.

Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Jie Zhan <zhanjie9@hisilicon.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Author: jiezhan0214

drivers/cpufreq/cppc_cpufreq.c

@@ -184,7 +184,7 @@ static void cppc_cpufreq_cpu_fie_exit(struct cpufreq_policy *policy)
 	}
 }
 
-static void __init cppc_freq_invariance_init(void)
+static void cppc_fie_kworker_init(void)
 {
 	struct sched_attr attr = {
 		.size		= sizeof(struct sched_attr),
@@ -201,17 +201,6 @@ static void __init cppc_freq_invariance_init(void)
 	};
 	int ret;
 
-	if (fie_disabled != FIE_ENABLED && fie_disabled != FIE_DISABLED) {
-		fie_disabled = FIE_ENABLED;
-		if (cppc_perf_ctrs_in_pcc()) {
-			pr_info("FIE not enabled on systems with registers in PCC\n");
-			fie_disabled = FIE_DISABLED;
-		}
-	}
-
-	if (fie_disabled)
-		return;
-
 	kworker_fie = kthread_run_worker(0, "cppc_fie");
 	if (IS_ERR(kworker_fie)) {
 		pr_warn("%s: failed to create kworker_fie: %ld\n", __func__,
@@ -229,6 +218,22 @@ static void __init cppc_freq_invariance_init(void)
 	}
 }
 
+static void __init cppc_freq_invariance_init(void)
+{
+	if (fie_disabled != FIE_ENABLED && fie_disabled != FIE_DISABLED) {
+		fie_disabled = FIE_ENABLED;
+		if (cppc_perf_ctrs_in_pcc()) {
+			pr_info("FIE not enabled on systems with registers in PCC\n");
+			fie_disabled = FIE_DISABLED;
+		}
+	}
+
+	if (fie_disabled)
+		return;
+
+	cppc_fie_kworker_init();
+}
+
 static void cppc_freq_invariance_exit(void)
 {
 	if (fie_disabled)