ath10k: fix PMF by using AES-CMAC/IGTK software crypto

While testing with older supplicant, .drv_set_key() was failing due to
higher than ath10k firmware could handle key_index (WMI_MAX_KEY_INDEX == 3).

--
wpa_driver_nl80211_set_key: ifindex=15 alg=4 addr=0x7f02b129fbe3 key_idx=4 set_tx=0 seq_len=6 key_len=16
    broadcast key
nl80211: set_key failed; err=-22 Invalid argument)
wlan0: WPA: Failed to configure IGTK to the driver
wlan0: RSN: Failed to configure IGTK
--

In order to fix this case (PMF: AES-CMAC/IGTK) force the AES_CMAC cipher to
be handled by software.

Signed-off-by: Bartosz Markowski <bartosz.markowski@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index e0831e2..341f3c8 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -66,8 +66,8 @@ static int ath10k_send_key(struct ath10k_vif *arvif,
                arg.key_cipher = WMI_CIPHER_WEP;
                break;
        case WLAN_CIPHER_SUITE_AES_CMAC:
-               /* this one needs to be done in software */
-               return 1;
+               WARN_ON(1);
+               return -EINVAL;
        default:
                ath10k_warn(ar, "cipher %d is not supported\n", key->cipher);
                return -EOPNOTSUPP;
@@ -4070,6 +4070,10 @@ static int ath10k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
        int ret = 0;
        u32 flags = 0;
 
+       /* this one needs to be done in software */
+       if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
+               return 1;
+
        if (key->keyidx > WMI_MAX_KEY_INDEX)
                return -ENOSPC;