lkml.org 
[lkml]   [2013]   [Jun]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 40/70] mwifiex: fix memory leak issue when driver unload
Date
3.5.7.14 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Amitkumar Karwar <akarwar@marvell.com>

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>
[ luis: backport to 3.5:
- adjust context: use dev instead of wdev->netdev ]
Signed-off-by: Luis Henriques <luis.henriques@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 4506cda..3a5b73f 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -1622,9 +1622,6 @@ int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct net_device *dev)
if (dev->reg_state == NETREG_REGISTERED)
unregister_netdevice(dev);

- if (dev->reg_state == NETREG_UNREGISTERED)
- free_netdev(dev);
-
/* 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 3192855..4be4d43 100644
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -636,6 +636,7 @@ 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;
--
1.8.1.2


\
 
 \ /
  Last update: 2013-06-05 03:21    [W:1.962 / U:0.056 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site