From: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx> All QCA chips have the ability to parse the CF Parameter Set IE in beacons. If the IE is malformed in the beacons from some APs [1], the HW locks up. In AP mode, a beacon stuck would happen and in client mode, a disconnection usually is the result. To fix this issue, set the AR_PCU_MISC_MODE2_CFP_IGNORE to ignore the CFP IE in beacons - this is applicable for all chips. For AP mode, if this issue happens, the NAV is also corrupted and has to be reset - this will be done in a subsequent patch. [1] : http://msujith.org/ath9k/cfp/Malformed-CF-Param.png Signed-off-by: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx> --- drivers/net/wireless/ath/ath9k/ar5008_phy.c | 2 ++ drivers/net/wireless/ath/ath9k/ar9003_phy.c | 6 ++++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ar5008_phy.c b/drivers/net/wireless/ath/ath9k/ar5008_phy.c index 0865647..9e4e2a6 100644 --- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c +++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c @@ -626,6 +626,8 @@ static void ar5008_hw_override_ini(struct ath_hw *ah, if (AR_SREV_9287_11_OR_LATER(ah)) val = val & (~AR_PCU_MISC_MODE2_HWWAR2); + val |= AR_PCU_MISC_MODE2_CFP_IGNORE; + REG_WRITE(ah, AR_PCU_MISC_MODE2, val); } diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.c b/drivers/net/wireless/ath/ath9k/ar9003_phy.c index b8a279e..ec37213 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c @@ -627,8 +627,10 @@ static void ar9003_hw_override_ini(struct ath_hw *ah) * MAC addr only will fail. */ val = REG_READ(ah, AR_PCU_MISC_MODE2) & (~AR_ADHOC_MCAST_KEYID_ENABLE); - REG_WRITE(ah, AR_PCU_MISC_MODE2, - val | AR_AGG_WEP_ENABLE_FIX | AR_AGG_WEP_ENABLE); + val |= AR_AGG_WEP_ENABLE_FIX | + AR_AGG_WEP_ENABLE | + AR_PCU_MISC_MODE2_CFP_IGNORE; + REG_WRITE(ah, AR_PCU_MISC_MODE2, val); REG_SET_BIT(ah, AR_PHY_CCK_DETECT, AR_PHY_CCK_DETECT_BB_ENABLE_ANT_FAST_DIV); -- 1.8.4 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
