ACPI: CPPC: Extract cppc_get_reg_val_in_pcc()

Extract the operations if register is in pcc out from cppc_get_reg_val()
as cppc_get_reg_val_in_pcc().

Reviewed-by: Pierre Gondois <[email protected]>
Signed-off-by: Lifeng Zheng <[email protected]>
Reviewed-by: Mario Limonciello <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Rafael J. Wysocki <[email protected]>

Author: Lifeng Zheng

drivers/acpi/cppc_acpi.c

@@ -1179,6 +1179,31 @@ static int cpc_write(int cpu, struct cpc_register_resource *reg_res, u64 val)
 	return ret_val;
 }
 
+static int cppc_get_reg_val_in_pcc(int cpu, struct cpc_register_resource *reg, u64 *val)
+{
+	int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu);
+	struct cppc_pcc_data *pcc_ss_data = NULL;
+	int ret;
+
+	if (pcc_ss_id < 0) {
+		pr_debug("Invalid pcc_ss_id\n");
+		return -ENODEV;
+	}
+
+	pcc_ss_data = pcc_data[pcc_ss_id];
+
+	down_write(&pcc_ss_data->pcc_lock);
+
+	if (send_pcc_cmd(pcc_ss_id, CMD_READ) >= 0)
+		ret = cpc_read(cpu, reg, val);
+	else
+		ret = -EIO;
+
+	up_write(&pcc_ss_data->pcc_lock);
+
+	return ret;
+}
+
 static int cppc_get_reg_val(int cpu, enum cppc_regs reg_idx, u64 *val)
 {
 	struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpu);
@@ -1201,29 +1226,8 @@ static int cppc_get_reg_val(int cpu, enum cppc_regs reg_idx, u64 *val)
 		return -EOPNOTSUPP;
 	}
 
-	if (CPC_IN_PCC(reg)) {
-		int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu);
-		struct cppc_pcc_data *pcc_ss_data = NULL;
-		int ret;
-
-		if (pcc_ss_id < 0) {
-			pr_debug("Invalid pcc_ss_id\n");
-			return -ENODEV;
-		}
-
-		pcc_ss_data = pcc_data[pcc_ss_id];
-
-		down_write(&pcc_ss_data->pcc_lock);
-
-		if (send_pcc_cmd(pcc_ss_id, CMD_READ) >= 0)
-			ret = cpc_read(cpu, reg, val);
-		else
-			ret = -EIO;
-
-		up_write(&pcc_ss_data->pcc_lock);
-
-		return ret;
-	}
+	if (CPC_IN_PCC(reg))
+		return cppc_get_reg_val_in_pcc(cpu, reg, val);
 
 	return cpc_read(cpu, reg, val);
 }