[3.8.y.z,extended,stable] Patch "mwifiex: fix memory leak issue when driver unload" has been added to staging queue

Message ID 1369259725-24956-1-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa May 22, 2013, 9:55 p.m.
This is a note to let you know that I have just added a patch titled

    mwifiex: fix memory leak issue when driver unload

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see



From d6003166c3821cf1cc40a1da2de47825ce4974f1 Mon Sep 17 00:00:00 2001
From: Amitkumar Karwar <akarwar@marvell.com>
Date: Mon, 6 May 2013 19:46:54 -0700
Subject: mwifiex: fix memory leak issue when driver unload

commit f16fdc9d2dc1e5b270e9a08377587e831e0d36ac upstream.

After unregister_netdevice() call the request is queued and
reg_state is changed to NETREG_UNREGISTERING.
As we check for NETREG_UNREGISTERED state, free_netdev() never
gets executed causing memory leak.

Initialize "dev->destructor" to free_netdev() to free device
data after unregistration.

Reported-by: Daniel Drake <dsd@laptop.org>
Tested-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
 drivers/net/wireless/mwifiex/cfg80211.c | 3 ---
 drivers/net/wireless/mwifiex/main.c     | 1 +
 2 files changed, 1 insertion(+), 3 deletions(-)



diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 3eca710..10cb3f1 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -2155,9 +2155,6 @@  int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct wireless_dev *wdev)
 	if (wdev->netdev->reg_state == NETREG_REGISTERED)

-	if (wdev->netdev->reg_state == NETREG_UNREGISTERED)
-		free_netdev(wdev->netdev);
 	/* Clear the priv in adapter */
 	priv->netdev = NULL;

diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
index 9c802ed..6d9bc63 100644
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -646,6 +646,7 @@  void mwifiex_init_priv_params(struct mwifiex_private *priv,
 						struct net_device *dev)
 	dev->netdev_ops = &mwifiex_netdev_ops;
+	dev->destructor = free_netdev;
 	/* Initialize private structure */
 	priv->current_key_index = 0;
 	priv->media_connected = false;