mac80211: fix VHT rate selection

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 43279

diff --git a/package/kernel/mac80211/patches/312-mac80211-skip-legacy-rate-mask-handling-for-VHT-rate.patch b/package/kernel/mac80211/patches/312-mac80211-skip-legacy-rate-mask-handling-for-VHT-rate.patch
new file mode 100644 (file)
index 0000000..23957af
--- /dev/null
+++ b/package/kernel/mac80211/patches/312-mac80211-skip-legacy-rate-mask-handling-for-VHT-rate.patch
@@ -0,0 +1,22 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Sat, 15 Nov 2014 03:45:56 +0100
+Subject: [PATCH] mac80211: skip legacy rate mask handling for VHT rates
+
+The rate mask code currently assumes that a rate is legacy if
+IEEE80211_TX_RC_MCS is not set. This might be the cause of bogus VHT
+rates being reported with minstrel_ht.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/net/mac80211/rate.c
++++ b/net/mac80211/rate.c
+@@ -385,7 +385,7 @@ static void rate_idx_match_mask(struct i
+                       *rate = alt_rate;
+                       return;
+               }
+-      } else {
++      } else if (!(rate->flags & IEEE80211_TX_RC_VHT_MCS)) {
+               /* handle legacy rates */
+               if (rate_idx_match_legacy_mask(rate, sband->n_bitrates, mask))
+                       return;