2 files changed, 13 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index f00f5c744f48..2e767cf22f1e 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1310,6 +1310,16 @@ static void ath9k_hw_override_ini(struct ath_hw *ah,
          * Necessary to avoid issues on AR5416 2.0
          */
         REG_WRITE(ah, 0x9800 + (651 << 2), 0x11);
+
+        /*
+         * Disable RIFS search on some chips to avoid baseband
+         * hang issues.
+         */
+        if (AR_SREV_9100(ah) || AR_SREV_9160(ah)) {
+                val = REG_READ(ah, AR_PHY_HEAVY_CLIP_FACTOR_RIFS);
+                val &= ~AR_PHY_RIFS_INIT_DELAY;
+                REG_WRITE(ah, AR_PHY_HEAVY_CLIP_FACTOR_RIFS, val);
+        }
 }
 
 static u32 ath9k_hw_def_ini_fixup(struct ath_hw *ah,
diff --git a/drivers/net/wireless/ath/ath9k/phy.h b/drivers/net/wireless/ath/ath9k/phy.h
index 31de27dc0c4a..0999a495fd46 100644
--- a/drivers/net/wireless/ath/ath9k/phy.h
+++ b/drivers/net/wireless/ath/ath9k/phy.h
@@ -384,6 +384,9 @@ bool ath9k_hw_set_rf_regs(struct ath_hw *ah,
 
 #define AR_PHY_HEAVY_CLIP_ENABLE         0x99E0
 
+#define AR_PHY_HEAVY_CLIP_FACTOR_RIFS    0x99EC
+#define AR_PHY_RIFS_INIT_DELAY         0x03ff0000
+
 #define AR_PHY_M_SLEEP      0x99f0
 #define AR_PHY_REFCLKDLY    0x99f4
 #define AR_PHY_REFCLKPD     0x99f8