diff options
| author | Sujith Manoharan <c_manoha@qca.qualcomm.com> | 2013-09-11 11:40:58 +0530 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2013-09-26 15:13:46 -0400 |
| commit | 9ef48932344a8ea9d6d1628d92afc2c5d6958336 (patch) | |
| tree | 31bf28736c45a84aad835dedc800446bd66a5bb7 /drivers/net/wireless/ath/ath9k/ar5008_phy.c | |
| parent | c6945455682c92b9b61f2cf354771e00da11492d (diff) | |
ath9k: Fix issue with parsing malformed CFP IE
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@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/ar5008_phy.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ar5008_phy.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar5008_phy.c b/drivers/net/wireless/ath/ath9k/ar5008_phy.c index 08656473c63e..9e4e2a693774 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); } |