linux-kernel - [PATCH 4/4] ACPI / PM: Sanitize checks in acpi_power_on

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Date:	Tue, 22 Jan 2013 03:11:32 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Lv Zheng <lv.zheng@...el.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: [PATCH 4/4] ACPI / PM: Sanitize checks in acpi_power_on_resources()

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

After the only user of acpi_power_on_resources(),
acpi_bus_init_power(), has been changed to avoid calling it
for state equal to ACPI_STATE_D3_COLD, it doesn't have to special
case that state any more.

For this reason, modify the checks in acpi_power_on_resources()
so that it returns -EINVAL for ACPI_STATE_D3_COLD as it should.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/acpi/power.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

Index: linux-pm/drivers/acpi/power.c
===================================================================
--- linux-pm.orig/drivers/acpi/power.c
+++ linux-pm/drivers/acpi/power.c
@@ -622,12 +622,9 @@ int acpi_power_get_inferred_state(struct
 
 int acpi_power_on_resources(struct acpi_device *device, int state)
 {
-	if (!device || state < ACPI_STATE_D0 || state > ACPI_STATE_D3_COLD)
+	if (!device || state < ACPI_STATE_D0 || state > ACPI_STATE_D3_HOT)
 		return -EINVAL;
 
-	if (state == ACPI_STATE_D3_COLD)
-		return 0;
-
 	return acpi_power_on_list(&device->power.states[state].resources);
 }
 

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