2 files changed, 32 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
index de1972307b0a..f80d1d633980 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
@@ -21,6 +21,36 @@ void ar9003_paprd_enable(struct ath_hw *ah, bool val)
 {
         struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
         struct ath9k_channel *chan = ah->curchan;
+        struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
+
+        /*
+         * 3 bits for modalHeader5G.papdRateMaskHt20
+         * is used for sub-band disabling of PAPRD.
+         * 5G band is divided into 3 sub-bands -- upper,
+         * middle, lower.
+         * if bit 30 of modalHeader5G.papdRateMaskHt20 is set
+         * -- disable PAPRD for upper band 5GHz
+         * if bit 29 of modalHeader5G.papdRateMaskHt20 is set
+         * -- disable PAPRD for middle band 5GHz
+         * if bit 28 of modalHeader5G.papdRateMaskHt20 is set
+         * -- disable PAPRD for lower band 5GHz
+         */
+
+        if (IS_CHAN_5GHZ(chan)) {
+                if (chan->channel >= UPPER_5G_SUB_BAND_START) {
+                        if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
+                                                                  & BIT(30))
+                                val = false;
+                } else if (chan->channel >= MID_5G_SUB_BAND_START) {
+                        if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
+                                                                  & BIT(29))
+                                val = false;
+                } else {
+                        if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
+                                                                  & BIT(28))
+                                val = false;
+                }
+        }
 
         if (val) {
                 ah->paprd_table_write_done = true;
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 818acdd1ba90..a1c317455bc0 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -143,6 +143,8 @@
 #define AR_KEYTABLE_SIZE            128
 #define POWER_UP_TIME               10000
 #define SPUR_RSSI_THRESH            40
+#define UPPER_5G_SUB_BAND_START         5700
+#define MID_5G_SUB_BAND_START           5400
 
 #define CAB_TIMEOUT_VAL             10
 #define BEACON_TIMEOUT_VAL          10