linux-kernel - [PATCH 2/5] dell-laptop: fix rfkill memory leak on unload and failure paths

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Date:	Wed, 19 Aug 2009 15:06:48 +0100
From:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
To:	mjg@...hat.com
Cc:	marcel@...tmann.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
	Alan Jenkins <alan-jenkins@...fmail.co.uk>
Subject: [PATCH 2/5] dell-laptop: fix rfkill memory leak on unload and failure paths

rfkill_unregister() should always be followed by rfkill_destroy().

Signed-off-by: Alan Jenkins <alan-jenkins@...fmail.co.uk>
---
 drivers/platform/x86/dell-laptop.c |   30 ++++++++++++++++++------------
 1 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 12b6f33..8fbff38 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -268,6 +268,22 @@ err_wifi:
 	return ret;
 }
 
+static void dell_cleanup_rfkill(void)
+{
+	if (wifi_rfkill) {
+		rfkill_unregister(wifi_rfkill);
+		rfkill_destroy(wifi_rfkill);
+	}
+	if (bluetooth_rfkill) {
+		rfkill_unregister(bluetooth_rfkill);
+		rfkill_destroy(bluetooth_rfkill);
+	}
+	if (wwan_rfkill) {
+		rfkill_unregister(wwan_rfkill);
+		rfkill_destroy(wwan_rfkill);
+	}
+}
+
 static int dell_send_intensity(struct backlight_device *bd)
 {
 	struct calling_interface_buffer buffer;
@@ -370,12 +386,7 @@ static int __init dell_init(void)
 	return 0;
 
 fail_backlight:
-	if (wifi_rfkill)
-		rfkill_unregister(wifi_rfkill);
-	if (bluetooth_rfkill)
-		rfkill_unregister(bluetooth_rfkill);
-	if (wwan_rfkill)
-		rfkill_unregister(wwan_rfkill);
+	dell_cleanup_rfkill();
 fail_rfkill:
 	kfree(da_tokens);
 	return ret;
@@ -384,12 +395,7 @@ fail_rfkill:
 static void __exit dell_exit(void)
 {
 	backlight_device_unregister(dell_backlight_device);
-	if (wifi_rfkill)
-		rfkill_unregister(wifi_rfkill);
-	if (bluetooth_rfkill)
-		rfkill_unregister(bluetooth_rfkill);
-	if (wwan_rfkill)
-		rfkill_unregister(wwan_rfkill);
+	dell_cleanup_rfkill();
 }
 
 module_init(dell_init);
-- 
1.6.3.2

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