From 34ad2a0b71ab9e6e67199fb0cc4a859b66e7f821 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 4 May 2010 08:01:58 +0000
Subject: [PATCH] ath9k: fix filtering out multi-descriptor frames, which can
cause issues with 11n links because of bogus rx status data
SVN-Revision: 21351
---
.../550-ath9k_no_multi_desc_frames.patch | 24 +++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 package/mac80211/patches/550-ath9k_no_multi_desc_frames.patch
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
index 0000000000..3bc730e32e
--- /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)
--
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