iwlagn: avoid crash if vif is not assigned

For reasons that aren't entirely clear to me,
we sometimes get here during hardware reset
without the interface being set. Don't crash,
but keep a warning.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
index 2d927a94074d..fbaa8d293654 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
@@ -507,6 +507,11 @@ void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
 
         mutex_lock(&priv->mutex);
 
+        if (WARN_ON(!ctx->vif)) {
+                mutex_unlock(&priv->mutex);
+                return;
+        }
+
         if (changes & BSS_CHANGED_BEACON_INT)
                 force = true;