ath9k: fix a null pointer deref issue

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24312 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/mac80211/patches/320-pending_work.patch b/package/mac80211/patches/320-pending_work.patch
index 44d8df2..38bf6fb 100644 (file)
--- a/package/mac80211/patches/320-pending_work.patch
+++ b/package/mac80211/patches/320-pending_work.patch
@@ -2137,3 +2137,17 @@
        }
  
        /* add interfaces */
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -1745,7 +1745,10 @@ int ath_tx_start(struct ieee80211_hw *hw
+       int frmlen = skb->len + FCS_LEN;
+       int q;
+ 
+-      txctl->an = (struct ath_node *)sta->drv_priv;
++      /* NOTE:  sta can be NULL according to net/mac80211.h */
++      if (sta)
++              txctl->an = (struct ath_node *)sta->drv_priv;
++
+       if (info->control.hw_key)
+               frmlen += info->control.hw_key->icv_len;
+