From 5d5d7c3b938d0c365e65180f2b9d6ffad4973cee Mon Sep 17 00:00:00 2001 From: Emil Goode Date: Tue, 18 Sep 2012 18:04:07 +0200 Subject: [PATCH] staging: wlan-ng: Fix dereference before NULL check Smatch is warning about a dereference before we check for NULL. This patch moves the dereference to after the NULL check. Smatch warning: drivers/staging/wlan-ng/cfg80211.c:345 prism2_scan() warn: variable dereferenced before check 'request' (see line 332) Signed-off-by: Emil Goode Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wlan-ng/cfg80211.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/staging/wlan-ng/cfg80211.c b/drivers/staging/wlan-ng/cfg80211.c index 0970127344e6..57a2b058e3de 100644 --- a/drivers/staging/wlan-ng/cfg80211.c +++ b/drivers/staging/wlan-ng/cfg80211.c @@ -329,9 +329,9 @@ int prism2_get_station(struct wiphy *wiphy, struct net_device *dev, int prism2_scan(struct wiphy *wiphy, struct cfg80211_scan_request *request) { - struct net_device *dev = request->wdev->netdev; + struct net_device *dev; struct prism2_wiphy_private *priv = wiphy_priv(wiphy); - wlandevice_t *wlandev = dev->ml_priv; + wlandevice_t *wlandev; struct p80211msg_dot11req_scan msg1; struct p80211msg_dot11req_scan_results msg2; struct cfg80211_bss *bss; @@ -345,6 +345,9 @@ int prism2_scan(struct wiphy *wiphy, struct cfg80211_scan_request *request) if (!request) return -EINVAL; + dev = request->wdev->netdev; + wlandev = dev->ml_priv; + if (priv->scan_request && priv->scan_request != request) return -EBUSY; -- 2.20.1