5 files changed, 27 insertions, 5 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar5008_phy.c b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
index ffcf44a4058..94acce59f51 100644
--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
@@ -729,6 +729,7 @@ static int ar5008_hw_process_ini(struct ath_hw *ah,
                                  struct ath9k_channel *chan)
 {
         struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
+        struct ath_common *common = ath9k_hw_common(ah);
         int i, regWrites = 0;
         struct ieee80211_channel *channel = chan->chan;
         u32 modesIndex, freqIndex;
@@ -805,7 +806,8 @@ static int ar5008_hw_process_ini(struct ath_hw *ah,
                 REG_WRITE(ah, reg, val);
 
                 if (reg >= 0x7800 && reg < 0x78a0
-                    && ah->config.analog_shiftreg) {
+                    && ah->config.analog_shiftreg
+                    && (common->bus_ops->ath_bus_type != ATH_USB)) {
                         udelay(100);
                 }
 
@@ -835,7 +837,8 @@ static int ar5008_hw_process_ini(struct ath_hw *ah,
                 REG_WRITE(ah, reg, val);
 
                 if (reg >= 0x7800 && reg < 0x78a0
-                    && ah->config.analog_shiftreg) {
+                    && ah->config.analog_shiftreg
+                    && (common->bus_ops->ath_bus_type != ATH_USB)) {
                         udelay(100);
                 }
 
diff --git a/drivers/net/wireless/ath/ath9k/eeprom_9287.c b/drivers/net/wireless/ath/ath9k/eeprom_9287.c
index 8cd8333cc08..2f0712ea49a 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_9287.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_9287.c
@@ -392,6 +392,8 @@ static void ath9k_hw_set_ar9287_power_cal_table(struct ath_hw *ah,
                                                            numXpdGain);
                         }
 
+                        ENABLE_REGWRITE_BUFFER(ah);
+
                         if (i == 0) {
                                 if (!ath9k_hw_ar9287_get_eeprom(ah,
                                                         EEP_OL_PWRCTRL)) {
@@ -442,6 +444,7 @@ static void ath9k_hw_set_ar9287_power_cal_table(struct ath_hw *ah,
                                         regOffset += 4;
                                 }
                         }
+                        REGWRITE_BUFFER_FLUSH(ah);
                 }
         }
 
@@ -757,6 +760,8 @@ static void ath9k_hw_ar9287_set_txpower(struct ath_hw *ah,
                         ratesArray[i] -= AR9287_PWR_TABLE_OFFSET_DB * 2;
         }
 
+        ENABLE_REGWRITE_BUFFER(ah);
+
         /* OFDM power per rate */
         REG_WRITE(ah, AR_PHY_POWER_TX_RATE1,
                   ATH9K_POW_SM(ratesArray[rate18mb], 24)
@@ -840,6 +845,7 @@ static void ath9k_hw_ar9287_set_txpower(struct ath_hw *ah,
                           | ATH9K_POW_SM(ratesArray[rateDupOfdm], 8)
                           | ATH9K_POW_SM(ratesArray[rateDupCck], 0));
         }
+        REGWRITE_BUFFER_FLUSH(ah);
 }
 
 static void ath9k_hw_ar9287_set_addac(struct ath_hw *ah,
diff --git a/drivers/net/wireless/ath/ath9k/eeprom_def.c b/drivers/net/wireless/ath/ath9k/eeprom_def.c
index fccd87df730..995949ddd63 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_def.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_def.c
@@ -799,6 +799,8 @@ static void ath9k_hw_set_def_power_cal_table(struct ath_hw *ah,
                                                            pwr_table_offset,
                                                            &diff);
 
+                        ENABLE_REGWRITE_BUFFER(ah);
+
                         if ((i == 0) || AR_SREV_5416_20_OR_LATER(ah)) {
                                 if (OLC_FOR_AR9280_20_LATER) {
                                         REG_WRITE(ah,
@@ -847,6 +849,7 @@ static void ath9k_hw_set_def_power_cal_table(struct ath_hw *ah,
 
                                 regOffset += 4;
                         }
+                        REGWRITE_BUFFER_FLUSH(ah);
                 }
         }
 
@@ -1205,6 +1208,8 @@ static void ath9k_hw_def_set_txpower(struct ath_hw *ah,
                 }
         }
 
+        ENABLE_REGWRITE_BUFFER(ah);
+
         REG_WRITE(ah, AR_PHY_POWER_TX_RATE1,
                   ATH9K_POW_SM(ratesArray[rate18mb], 24)
                   | ATH9K_POW_SM(ratesArray[rate12mb], 16)
@@ -1291,6 +1296,8 @@ static void ath9k_hw_def_set_txpower(struct ath_hw *ah,
         REG_WRITE(ah, AR_PHY_POWER_TX_SUB,
                   ATH9K_POW_SM(pModal->pwrDecreaseFor3Chain, 6)
                   | ATH9K_POW_SM(pModal->pwrDecreaseFor2Chain, 0));
+
+        REGWRITE_BUFFER_FLUSH(ah);
 }
 
 static u16 ath9k_hw_def_get_spur_channel(struct ath_hw *ah, u16 i, bool is2GHz)
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 6650fd48415..c86eea28a88 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -99,18 +99,22 @@
 #define REG_CLR_BIT(_a, _r, _f) \
         REG_WRITE(_a, _r, REG_READ(_a, _r) & ~(_f))
 
-#define DO_DELAY(x) do {                        \
-                if ((++(x) % 64) == 0)          \
-                        udelay(1);              \
+#define DO_DELAY(x) do {                                        \
+                if (((++(x) % 64) == 0) &&                      \
+                    (ath9k_hw_common(ah)->bus_ops->ath_bus_type \
+                        != ATH_USB))                            \
+                        udelay(1);                              \
         } while (0)
 
 #define REG_WRITE_ARRAY(iniarray, column, regWr) do {                   \
                 int r;                                                  \
+                ENABLE_REGWRITE_BUFFER(ah);                             \
                 for (r = 0; r < ((iniarray)->ia_rows); r++) {           \
                         REG_WRITE(ah, INI_RA((iniarray), (r), 0),       \
                                   INI_RA((iniarray), r, (column)));     \
                         DO_DELAY(regWr);                                \
                 }                                                       \
+                REGWRITE_BUFFER_FLUSH(ah);                              \
         } while (0)
 
 #define AR_GPIO_OUTPUT_MUX_AS_OUTPUT             0
diff --git a/drivers/net/wireless/ath/ath9k/phy.h b/drivers/net/wireless/ath/ath9k/phy.h
index 5e3d7496986..e4029325c78 100644
--- a/drivers/net/wireless/ath/ath9k/phy.h
+++ b/drivers/net/wireless/ath/ath9k/phy.h
@@ -40,10 +40,12 @@
 
 #define REG_WRITE_RF_ARRAY(iniarray, regData, regWr) do {               \
                 int r;                                                  \
+                ENABLE_REGWRITE_BUFFER(ah);                             \
                 for (r = 0; r < ((iniarray)->ia_rows); r++) {           \
                         REG_WRITE(ah, INI_RA((iniarray), r, 0), (regData)[r]); \
                         DO_DELAY(regWr);                                \
                 }                                                       \
+                REGWRITE_BUFFER_FLUSH(ah);                              \
         } while (0)
 
 #define ANTSWAP_AB 0x0001