linux-kernel - [PATCH v1 8/9] ACPI: processor: idle: Redefine setup idle functions to void

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Message-ID: <20250929093754.3998136-9-lihuisong@huawei.com>
Date: Mon, 29 Sep 2025 17:37:53 +0800
From: Huisong Li <lihuisong@...wei.com>
To: <rafael@...nel.org>, <lenb@...nel.org>
CC: <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<Sudeep.Holla@....com>, <linuxarm@...wei.com>, <jonathan.cameron@...wei.com>,
	<zhanjie9@...ilicon.com>, <zhenglifeng1@...wei.com>, <yubowen8@...wei.com>,
	<lihuisong@...wei.com>
Subject: [PATCH v1 8/9] ACPI: processor: idle: Redefine setup idle functions to void

Notice that the acpi_processor_setup_cpuidle_states() don't need to
return any value because their callers don't check them anyway.
In addition, acpi_processor_setup_lpi_states() wouldn't execute with
failure. So redefine setup idle functions to void.

No intentional functional impact.

Signed-off-by: Huisong Li <lihuisong@...wei.com>
---
 drivers/acpi/processor_idle.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 2d672afc7498..9f456a6fa584 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1183,7 +1183,7 @@ static int acpi_idle_lpi_enter(struct cpuidle_device *dev,
 	return -EINVAL;
 }
 
-static int acpi_processor_setup_lpi_states(struct acpi_processor *pr)
+static void acpi_processor_setup_lpi_states(struct acpi_processor *pr)
 {
 	int i;
 	struct acpi_lpi_state *lpi;
@@ -1191,7 +1191,7 @@ static int acpi_processor_setup_lpi_states(struct acpi_processor *pr)
 	struct cpuidle_driver *drv = &acpi_idle_driver;
 
 	if (!pr->flags.has_lpi)
-		return -EOPNOTSUPP;
+		return;
 
 	for (i = 0; i < pr->power.count && i < CPUIDLE_STATE_MAX; i++) {
 		lpi = &pr->power.lpi_states[i];
@@ -1209,8 +1209,6 @@ static int acpi_processor_setup_lpi_states(struct acpi_processor *pr)
 	}
 
 	drv->state_count = i;
-
-	return 0;
 }
 
 /**
@@ -1219,13 +1217,13 @@ static int acpi_processor_setup_lpi_states(struct acpi_processor *pr)
  *
  * @pr: the ACPI processor
  */
-static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
+static void acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
 {
 	int i;
 	struct cpuidle_driver *drv = &acpi_idle_driver;
 
 	if (!pr->flags.power_setup_done || !pr->flags.power)
-		return -EINVAL;
+		return;
 
 	drv->safe_state_index = -1;
 	for (i = ACPI_IDLE_STATE_START; i < CPUIDLE_STATE_MAX; i++) {
@@ -1233,11 +1231,12 @@ static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
 		drv->states[i].desc[0] = '\0';
 	}
 
-	if (pr->flags.has_lpi)
-		return acpi_processor_setup_lpi_states(pr);
+	if (pr->flags.has_lpi) {
+		acpi_processor_setup_lpi_states(pr);
+		return;
+	}
 
 	acpi_processor_setup_cstates(pr);
-	return 0;
 }
 
 /**
-- 
2.33.0