From 8907a6fb6281a9aa25df2c7e2996cedcd6e5559f Mon Sep 17 00:00:00 2001 From: Tim Gardner Date: Fri, 7 Dec 2012 06:28:34 -0700 Subject: iwlwifi: iwlagn_request_scan: Fix check for priv->scan_request The WARN_ON_ONCE() check for scan_request will not correctly detect a NULL pointer for scan_type == IWL_SCAN_NORMAL. Make it explicit that the check only applies to normal scans. Convert WARN_ON_ONCE to WARN_ON since priv->scan_request really _can't_ be NULL for normal scans. If it is then we should emit frequent warnings. This smatch warning led to scrutiny of iwlagn_request_scan(): drivers/net/wireless/iwlwifi/dvm/scan.c:894 iwlagn_request_scan() error: we previously assumed 'priv->scan_request' could be null (see line 792) Signed-off-by: Tim Gardner Reviewed-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- drivers/net/wireless/iwlwifi/dvm/scan.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/dvm/scan.c b/drivers/net/wireless/iwlwifi/dvm/scan.c index aad5fa424a5..610ed2204e1 100644 --- a/drivers/net/wireless/iwlwifi/dvm/scan.c +++ b/drivers/net/wireless/iwlwifi/dvm/scan.c @@ -673,8 +673,9 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif) const u8 *ssid = NULL; u8 ssid_len = 0; - if (WARN_ON_ONCE(priv->scan_request && - priv->scan_request->n_channels > MAX_SCAN_CHANNEL)) + if (WARN_ON(priv->scan_type == IWL_SCAN_NORMAL && + (!priv->scan_request || + priv->scan_request->n_channels > MAX_SCAN_CHANNEL))) return -EINVAL; lockdep_assert_held(&priv->mutex); -- cgit v1.2.3-70-g09d2