ath9k: fix filtering out multi-descriptor frames, which can cause issues with 11n...

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21351 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/mac80211/patches/550-ath9k_no_multi_desc_frames.patch b/package/mac80211/patches/550-ath9k_no_multi_desc_frames.patch
new file mode 100644 (file)
index 0000000..3bc730e
--- /dev/null
+++ b/package/mac80211/patches/550-ath9k_no_multi_desc_frames.patch
@@ -0,0 +1,24 @@
+--- a/drivers/net/wireless/ath/ath9k/common.c
++++ b/drivers/net/wireless/ath/ath9k/common.c
+@@ -57,13 +57,19 @@ static bool ath9k_rx_accept(struct ath_c
+        * rs_more indicates chained descriptors which can be used
+        * to link buffers together for a sort of scatter-gather
+        * operation.
+-       *
++       * reject the frame, we don't support scatter-gather yet and
++       * the frame is probably corrupt anyway
++       */
++      if (rx_stats->rs_more)
++              return false;
++
++      /*
+        * The rx_stats->rs_status will not be set until the end of the
+        * chained descriptors so it can be ignored if rs_more is set. The
+        * rs_more will be false at the last element of the chained
+        * descriptors.
+        */
+-      if (!rx_stats->rs_more && rx_stats->rs_status != 0) {
++      if (rx_stats->rs_status != 0) {
+               if (rx_stats->rs_status & ATH9K_RXERR_CRC)
+                       rxs->flag |= RX_FLAG_FAILED_FCS_CRC;
+               if (rx_stats->rs_status & ATH9K_RXERR_PHY)