1 files changed, 19 insertions, 5 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 6f7faf08b925..57c59b6ad5ea 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1697,11 +1697,16 @@ static bool ath9k_hw_set_reset(struct ath_hw *ah, int type)
                 if (tmpReg &
                     (AR_INTR_SYNC_LOCAL_TIMEOUT |
                      AR_INTR_SYNC_RADM_CPL_TIMEOUT)) {
+                        u32 val;
                         REG_WRITE(ah, AR_INTR_SYNC_ENABLE, 0);
-                        REG_WRITE(ah, AR_RC, AR_RC_AHB | AR_RC_HOSTIF);
-                } else {
+
+                        val = AR_RC_HOSTIF;
+                        if (!AR_SREV_9300_20_OR_LATER(ah))
+                                val |= AR_RC_AHB;
+                        REG_WRITE(ah, AR_RC, val);
+
+                } else if (!AR_SREV_9300_20_OR_LATER(ah))
                         REG_WRITE(ah, AR_RC, AR_RC_AHB);
-                }
 
                 rst_flags = AR_RTC_RC_MAC_WARM;
                 if (type == ATH9K_RESET_COLD)
@@ -1732,7 +1737,7 @@ static bool ath9k_hw_set_reset_power_on(struct ath_hw *ah)
         REG_WRITE(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN |
                   AR_RTC_FORCE_WAKE_ON_INT);
 
-        if (!AR_SREV_9100(ah))
+        if (!AR_SREV_9100(ah) && !AR_SREV_9300_20_OR_LATER(ah))
                 REG_WRITE(ah, AR_RC, AR_RC_AHB);
 
         REG_WRITE(ah, AR_RTC_RESET, 0);
@@ -2413,15 +2418,24 @@ EXPORT_SYMBOL(ath9k_hw_keyisvalid);
 /* Power Management (Chipset) */
 /******************************/
 
+/*
+ * Notify Power Mgt is disabled in self-generated frames.
+ * If requested, force chip to sleep.
+ */
 static void ath9k_set_power_sleep(struct ath_hw *ah, int setChip)
 {
         REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
         if (setChip) {
+                /*
+                 * Clear the RTC force wake bit to allow the
+                 * mac to go to sleep.
+                 */
                 REG_CLR_BIT(ah, AR_RTC_FORCE_WAKE,
                             AR_RTC_FORCE_WAKE_EN);
-                if (!AR_SREV_9100(ah))
+                if (!AR_SREV_9100(ah) && !AR_SREV_9300_20_OR_LATER(ah))
                         REG_WRITE(ah, AR_RC, AR_RC_AHB | AR_RC_HOSTIF);
 
+                /* Shutdown chip. Active low */
                 if (!AR_SREV_5416(ah) && !AR_SREV_9271(ah))
                         REG_CLR_BIT(ah, (AR_RTC_RESET),
                                     AR_RTC_RESET_EN);