mwifiex: fix NULL pointer dereference in set_channel()
In set_channel() callback handler, "priv" pointer is derived from
net_device. Sometimes net_device pointer coming from the stack
is NULL which causes kernel crash.
This patch fixes the problem by deriving "priv" from wiphy
when net_device pointer is NULL.
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>
diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 6fef492..54e45c8 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -376,7 +376,12 @@
struct ieee80211_channel *chan,
enum nl80211_channel_type channel_type)
{
- struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
+ struct mwifiex_private *priv;
+
+ if (dev)
+ priv = mwifiex_netdev_get_priv(dev);
+ else
+ priv = mwifiex_cfg80211_get_priv(wiphy);
if (priv->media_connected) {
wiphy_err(wiphy, "This setting is valid only when station "