linux-kernel - [PATCH 2/13] ACPI / PM: Do not refcount power resources that can't be turned on

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Date:	Thu, 25 Nov 2010 00:03:32 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Len Brown <lenb@...nel.org>
Cc:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Linux-pm mailing list" <linux-pm@...ts.linux-foundation.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Maciej Rutecki <maciej.rutecki@...il.com>
Subject: [PATCH 2/13] ACPI / PM: Do not refcount power resources that can't be turned on

From: Rafael J. Wysocki <rjw@...k.pl>

If turning on a power resource fails, do not reference count it,
since it cannot be in use in that case.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/acpi/power.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6/drivers/acpi/power.c
===================================================================
--- linux-2.6.orig/drivers/acpi/power.c
+++ linux-2.6/drivers/acpi/power.c
@@ -213,11 +213,13 @@ static int acpi_power_on(acpi_handle han
 				  resource->name));
 	} else {
 		result = __acpi_power_on(resource);
+		if (result)
+			resource->ref_count--;
 	}
 
 	mutex_unlock(&resource->resource_lock);
 
-	return 0;
+	return result;
 }
 
 static int acpi_power_off_device(acpi_handle handle)

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