Sebastian Moeller wrote:
> It is a net gear WNDR3700 v2, so according to:
> http://wiki.openwrt.org/toh/netgear/wndr3700 it is a Atheros AR7161 rev 2 680
> MHz soc with the following wireless parts: Atheros AR9223 802.11bgn / Atheros
> AR9220 802.11an.
> 
> Sure, I hope I got the right one. Now this is not from the same boot as the
> one with the errors, but I assume that does not make a difference… Since I am
> located in Germany I set the regulatory domain to DE. please let me know if I
> you need any additional information or testing (note I am not set up to build
> cerowrt myself, so I would need Dave Täht's help to build a modified firmware)

Can you try this patch ?

diff --git a/drivers/net/wireless/ath/ath9k/ar9002_mac.c 
b/drivers/net/wireless/ath/ath9k/ar9002_mac.c
index 8d78253..0337de7 100644
--- a/drivers/net/wireless/ath/ath9k/ar9002_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_mac.c
@@ -76,9 +76,16 @@ static bool ar9002_hw_get_isr(struct ath_hw *ah, enum 
ath9k_int *masked)
                                mask2 |= ATH9K_INT_CST;
                        if (isr2 & AR_ISR_S2_TSFOOR)
                                mask2 |= ATH9K_INT_TSFOOR;
+
+                       if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
+                               REG_WRITE(ah, AR_ISR_S2, isr2);
+                               isr &= ~AR_ISR_BCNMISC;
+                       }
                }
 
-               isr = REG_READ(ah, AR_ISR_RAC);
+               if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)
+                       isr = REG_READ(ah, AR_ISR_RAC);
+
                if (isr == 0xffffffff) {
                        *masked = 0;
                        return false;
@@ -97,11 +104,23 @@ static bool ar9002_hw_get_isr(struct ath_hw *ah, enum 
ath9k_int *masked)
 
                        *masked |= ATH9K_INT_TX;
 
-                       s0_s = REG_READ(ah, AR_ISR_S0_S);
+                       if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED) {
+                               s0_s = REG_READ(ah, AR_ISR_S0_S);
+                               s1_s = REG_READ(ah, AR_ISR_S1_S);
+                       } else {
+                               s0_s = REG_READ(ah, AR_ISR_S0);
+                               REG_WRITE(ah, AR_ISR_S0, s0_s);
+                               s1_s = REG_READ(ah, AR_ISR_S1);
+                               REG_WRITE(ah, AR_ISR_S1, s1_s);
+
+                               isr &= ~(AR_ISR_TXOK |
+                                        AR_ISR_TXDESC |
+                                        AR_ISR_TXERR |
+                                        AR_ISR_TXEOL);
+                       }
+
                        ah->intr_txqs |= MS(s0_s, AR_ISR_S0_QCU_TXOK);
                        ah->intr_txqs |= MS(s0_s, AR_ISR_S0_QCU_TXDESC);
-
-                       s1_s = REG_READ(ah, AR_ISR_S1_S);
                        ah->intr_txqs |= MS(s1_s, AR_ISR_S1_QCU_TXERR);
                        ah->intr_txqs |= MS(s1_s, AR_ISR_S1_QCU_TXEOL);
                }
@@ -120,7 +139,12 @@ static bool ar9002_hw_get_isr(struct ath_hw *ah, enum 
ath9k_int *masked)
        if (isr & AR_ISR_GENTMR) {
                u32 s5_s;
 
-               s5_s = REG_READ(ah, AR_ISR_S5_S);
+               if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED) {
+                       s5_s = REG_READ(ah, AR_ISR_S5_S);
+               } else {
+                       s5_s = REG_READ(ah, AR_ISR_S5);
+               }
+
                ah->intr_gen_timer_trigger =
                                MS(s5_s, AR_ISR_S5_GENTIMER_TRIG);
 
@@ -133,6 +157,16 @@ static bool ar9002_hw_get_isr(struct ath_hw *ah, enum 
ath9k_int *masked)
                if ((s5_s & AR_ISR_S5_TIM_TIMER) &&
                    !(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
                        *masked |= ATH9K_INT_TIM_TIMER;
+
+               if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
+                       REG_WRITE(ah, AR_ISR_S5, s5_s);
+                       isr &= ~AR_ISR_GENTMR;
+               }
+       }
+
+       if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
+               REG_WRITE(ah, AR_ISR, isr);
+               REG_READ(ah, AR_ISR);
        }
 
        if (sync_cause) {


A version that applies over OpenWrt trunk is here:
http://msujith.org/dir/patches/wl/Dec-13-2013/0001-ath9k-Interrupt-handling-fix-for-AR9002-family.patch

Sujith
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