ath9k: fix invalid register access on single-stream ar93xx devices (backport of r33628)

SVN-Revision: 33629

diff --git a/package/mac80211/patches/567-ath9k_ani_mrc_fix.patch b/package/mac80211/patches/567-ath9k_ani_mrc_fix.patch
new file mode 100644 (file)
index 0000000..80c9b2a
--- /dev/null
+++ b/package/mac80211/patches/567-ath9k_ani_mrc_fix.patch
@@ -0,0 +1,13 @@
+--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+@@ -1035,6 +1035,10 @@ static bool ar9003_hw_ani_control(struct
+                * is_on == 0 means MRC CCK is OFF (more noise imm)
+                */
+               bool is_on = param ? 1 : 0;
++
++              if (ah->caps.rx_chainmask == 1)
++                      break;
++
+               REG_RMW_FIELD(ah, AR_PHY_MRC_CCK_CTRL,
+                             AR_PHY_MRC_CCK_ENABLE, is_on);
+               REG_RMW_FIELD(ah, AR_PHY_MRC_CCK_CTRL,