ath9k_hw: enable CRC check of descriptors for AR9003

Enable CRC check on the descriptor fetched from host on AR9003
upon reseting the TX queue.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 05159584a544..44ea43a143d8 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -569,6 +569,9 @@ bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
                           AR_D_MISC_POST_FR_BKOFF_DIS);
         }
 
+        if (AR_SREV_9300_20_OR_LATER(ah))
+                REG_WRITE(ah, AR_Q_DESC_CRCCHK, AR_Q_DESC_CRCCHK_EN);
+
         if (qi->tqi_qflags & TXQ_FLAG_TXOKINT_ENABLE)
                 ah->txok_interrupt_mask |= 1 << q;
         else
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index ff8914049c53..d4371a43bdaa 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -478,6 +478,10 @@
 #define AR_Q_RDYTIMESHDN    0x0a40
 #define AR_Q_RDYTIMESHDN_M  0x000003FF
 
+/* MAC Descriptor CRC check */
+#define AR_Q_DESC_CRCCHK    0xa44
+/* Enable CRC check on the descriptor fetched from host */
+#define AR_Q_DESC_CRCCHK_EN 1
 
 #define AR_NUM_DCU      10
 #define AR_DCU_0        0x0001