[patch 4/6] ACPI processor: extract return values using PTR_ERR

[Thomas, Sujith]

From: Thomas Sujith <sujith.thomas@xxxxxxxxx>

Need to extract errors using PTR_ERR macro and
process accordingly.thermal_cooling_device_register
returning NULL means that CONFIG_THERMAL=n and in that
case no need to create symbolic links.

Signed-off-by: Thomas Sujith <sujith.thomas@xxxxxxxxx>
---

 drivers/acpi/processor_core.c |   27 ++++++++++++++++-----------
 1 files changed, 16 insertions(+), 11 deletions(-)

Index: linux-2.6.24/drivers/acpi/processor_core.c
===================================================================
--- linux-2.6.24.orig/drivers/acpi/processor_core.c
+++ linux-2.6.24/drivers/acpi/processor_core.c
@@ -670,21 +670,26 @@ static int __cpuinit acpi_processor_star
 
 	pr->cdev = thermal_cooling_device_register("Processor", device,
 						&processor_cooling_ops);
-	if (pr->cdev)
+	if (IS_ERR(pr->cdev)) {
+		result = PTR_ERR(pr->cdev);
+		goto end;
+	}
+	if (pr->cdev) {
 		printk(KERN_INFO PREFIX
 			"%s is registered as cooling_device%d\n",
 			device->dev.bus_id, pr->cdev->id);
-	else
-		goto end;
 
-	result = sysfs_create_link(&device->dev.kobj,
&pr->cdev->device.kobj,
-					"thermal_cooling");
-	if (result)
-		return result;
-	result = sysfs_create_link(&pr->cdev->device.kobj,
&device->dev.kobj,
-					"device");
-	if (result)
-		return result;
+		result = sysfs_create_link(&device->dev.kobj,
+					   &pr->cdev->device.kobj,
+					   "thermal_cooling");
+		if (result)
+			return result;
+		result = sysfs_create_link(&pr->cdev->device.kobj,
+					   &device->dev.kobj,
+					   "device");
+		if (result)
+			return result;
+	}
 
 	if (pr->flags.throttling) {
 		printk(KERN_INFO PREFIX "%s [%s] (supports",

Attachment: [patch 4 of 6] ACPI processor - extract return value using PTR_ERR
Description: [patch 4 of 6] ACPI processor - extract return value using PTR_ERR