linux-kernel - Re: [PATCH 3/5]acpi:glue.c Fix warning: variable 'ret' set but not used

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Date:	Wed, 30 Jun 2010 12:47:21 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	David Howells <dhowells@...hat.com>
CC:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	lenb@...nel.org
Subject: Re: [PATCH 3/5]acpi:glue.c Fix warning: variable 'ret' set but not
 used

o.k. hopefully this is getting close to being right.. I ended up 
spending the later half of the morning looking for 
dev_driver_string(dev) until I read device.h and realized you actually 
use that it's self to gather the debug info etc..(I admit it, I'm a newbie!)

anyways here is the updated patch, let me know if something need a 
changing..


 From 16df81551d1899e650ae28ea8d41931f7c391c7a Mon Sep 17 00:00:00 2001
From: Justin P. Mattock <justinmattock@...il.com>
Date: Wed, 30 Jun 2010 12:34:32 -0700
Subject: [PATCH]acpi:glue.c Fix Fix warning: variable 'ret' set but not used

Fix a warning message generated by gcc:
Im getting a warning message when building with gcc 4.6.0
   CC      drivers/acpi/glue.o
drivers/acpi/glue.c: In function 'acpi_bind_one':
drivers/acpi/glue.c:163:7: warning: variable 'ret' set but not used

  Signed-off-by: Justin P. Mattock <justinmattock@...il.com>
  Signed-off-by: David Howells <dhowells@...hat.com>
---
  drivers/acpi/glue.c |   16 +++++++++++++---
  1 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 4af6301..11ad510 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -145,6 +145,7 @@ static int acpi_bind_one(struct device *dev, 
acpi_handle handle)
  {
  	struct acpi_device *acpi_dev;
  	acpi_status status;
+	int fn, pn;

  	if (dev->archdata.acpi_handle) {
  		dev_warn(dev, "Drivers changed 'acpi_handle'\n");
@@ -160,12 +161,21 @@ static int acpi_bind_one(struct device *dev, 
acpi_handle handle)

  	status = acpi_bus_get_device(handle, &acpi_dev);
  	if (!ACPI_FAILURE(status)) {
-		int ret;

-		ret = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
+		fn = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
  				"firmware_node");
-		ret = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
+		pn = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
  				"physical_node");
+		if (fn) {
+			dev_warn(&acpi_dev->dev,
+				"Failed to create firmware_node link to %s %s: %d\n",
+				dev_driver_string(dev), dev_name(dev), fn);
+		} else if (pn) {
+			dev_warn(&acpi_dev->dev,
+				"Failed to create physical_node link to %s %s: %d\n",
+				dev_driver_string(dev), dev_name(dev), pn);
+				return AE_ERROR;
+		}			
  		if (acpi_dev->wakeup.flags.valid) {
  			device_set_wakeup_capable(dev, true);
  			device_set_wakeup_enable(dev,
-- 
1.7.1.rc1.21.gf3bd6


cheers,

Justin P. Mattock
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