ath9k_hw: fix A-MPDU key search issues on AR9003
Under load, a large number of frames can produce decryption errors, even when
no key cache update is being done. Performing a key search for every single
frame in an A-MPDU improves reliability.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index fd4fdb5..c686987 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1817,6 +1817,10 @@
ah->misc_mode |= AR_PCU_MIC_NEW_LOC_ENA;
+ /* enable key search for every frame in an aggregate */
+ if (AR_SREV_9300_20_OR_LATER(ah))
+ ah->misc_mode |= AR_PCU_ALWAYS_PERFORM_KEYSEARCH;
+
pCap->low_2ghz_chan = 2312;
pCap->high_2ghz_chan = 2732;
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index 60826b8..f6058b4 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -1568,6 +1568,7 @@
#define AR_PCU_TBTT_PROTECT 0x00200000
#define AR_PCU_CLEAR_VMF 0x01000000
#define AR_PCU_CLEAR_BA_VALID 0x04000000
+#define AR_PCU_ALWAYS_PERFORM_KEYSEARCH 0x10000000
#define AR_PCU_BT_ANT_PREVENT_RX 0x00100000
#define AR_PCU_BT_ANT_PREVENT_RX_S 20
