linux-kernel - [PATCH 3/4] provide error handling for unclean objects

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Message-Id: <1203368213-30528-3-git-send-email-gcosta@redhat.com>
Date:	Mon, 18 Feb 2008 17:56:52 -0300
From:	Glauber Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, andrew.grover@...el.com,
	paul.s.diefenbaugh@...el.com, linux@...do.de,
	anil.s.keshavamurthy@...el.com, lenb@...nel.org,
	linux-acpi@...r.kernel.org, Glauber Costa <gcosta@...hat.com>
Subject: [PATCH 3/4] provide error handling for unclean objects

Previously, if acpi_processor_start() failed to
create sysfs nodes, it would leave stuff to be cleaned,
that won't perish in acpi_processor_remove(),
since we'll have pr->cdev == NULL.

This patch cleans those objects.

Signed-off-by: Glauber Costa <gcosta@...hat.com>
---
 drivers/acpi/processor_core.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 5023410..06a230a 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -680,11 +680,12 @@ #endif
 	result = sysfs_create_link(&device->dev.kobj, &cdev->device.kobj,
 					"thermal_cooling");
 	if (result)
-		return result;
+		goto err_thermal;
+
 	result = sysfs_create_link(&cdev->device.kobj, &device->dev.kobj,
 					"device");
 	if (result)
-		return result;
+		goto err_sysfs;
 
 	pr->cdev = cdev;
 
@@ -694,9 +695,13 @@ #endif
 		printk(" %d throttling states", pr->throttling.state_count);
 		printk(")\n");
 	}
+	return result;
 
-      end:
-
+err_sysfs:
+	sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
+err_thermal:
+	thermal_cooling_device_unregister(pr->cdev);
+end:
 	return result;
 }
 
-- 
1.4.2

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