madwifi: fix crash under load

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15099 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/madwifi/patches/419-skb_unmap_crash.patch b/package/madwifi/patches/419-skb_unmap_crash.patch
new file mode 100644 (file)
index 0000000..28e7274
--- /dev/null
+++ b/package/madwifi/patches/419-skb_unmap_crash.patch
@@ -0,0 +1,20 @@
+--- a/ath/if_ath.c
++++ b/ath/if_ath.c
+@@ -13477,7 +13477,7 @@ cleanup_ath_buf(struct ath_softc *sc, st
+       if (bf == NULL) 
+               return bf;
+ 
+-      if (bf->bf_skbaddr) {
++      if (bf->bf_skb && bf->bf_skbaddr) {
+               bus_unmap_single(
+                       sc->sc_bdev,
+                       bf->bf_skbaddr, 
+@@ -13485,8 +13485,6 @@ cleanup_ath_buf(struct ath_softc *sc, st
+                               sc->sc_rxbufsize : bf->bf_skb->len),
+                       direction);
+               bf->bf_skbaddr = 0;
+-              bf->bf_desc->ds_link = 0;
+-              bf->bf_desc->ds_data = 0;
+       }
+ 
+ #ifdef ATH_SUPERG_FF