ath10k: fix group privacy action frame decryption for qca4019

Recent commit 46f6b06050b7 ("mac80211: Encrypt "Group addressed privacy" action
frames") encrypts group privacy action frames. But qca99x0 family chipset
delivers broadcast/multicast management frames as encrypted and it should be
decrypted by mac80211. Setting RX_FLAG_DECRYPTED stats for those frames is
breaking mesh connection establishment.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index f46f916..ffedc03 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -182,6 +182,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
                        .board_size = QCA99X0_BOARD_DATA_SZ,
                        .board_ext_size = QCA99X0_BOARD_EXT_DATA_SZ,
                },
+               .sw_decrypt_mcast_mgmt = true,
        },
        {
                .id = QCA9984_HW_1_0_DEV_VERSION,
@@ -205,6 +206,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
                        .board_size = QCA99X0_BOARD_DATA_SZ,
                        .board_ext_size = QCA99X0_BOARD_EXT_DATA_SZ,
                },
+               .sw_decrypt_mcast_mgmt = true,
        },
        {
                .id = QCA9888_HW_2_0_DEV_VERSION,
@@ -227,6 +229,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
                        .board_size = QCA99X0_BOARD_DATA_SZ,
                        .board_ext_size = QCA99X0_BOARD_EXT_DATA_SZ,
                },
+               .sw_decrypt_mcast_mgmt = true,
        },
        {
                .id = QCA9377_HW_1_0_DEV_VERSION,
@@ -285,6 +288,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
                        .board_size = QCA4019_BOARD_DATA_SZ,
                        .board_ext_size = QCA4019_BOARD_EXT_DATA_SZ,
                },
+               .sw_decrypt_mcast_mgmt = true,
        },
 };
 

diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 56daeb7..7e329dc 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -771,6 +771,11 @@ struct ath10k {
                        size_t board_size;
                        size_t board_ext_size;
                } fw;
+
+               /* qca99x0 family chips deliver broadcast/multicast management
+                * frames encrypted and expect software do decryption.
+                */
+               bool sw_decrypt_mcast_mgmt;
        } hw_params;
 
        /* contains the firmware images used with ATH10K_FIRMWARE_MODE_NORMAL */

diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index b9a3b09..4b4bf23 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -2243,6 +2243,29 @@ static int ath10k_wmi_10_4_op_pull_mgmt_rx_ev(struct ath10k *ar,
        return 0;
 }
 
+static bool ath10k_wmi_rx_is_decrypted(struct ath10k *ar,
+                                      struct ieee80211_hdr *hdr)
+{
+       if (!ieee80211_has_protected(hdr->frame_control))
+               return false;
+
+       /* FW delivers WEP Shared Auth frame with Protected Bit set and
+        * encrypted payload. However in case of PMF it delivers decrypted
+        * frames with Protected Bit set.
+        */
+       if (ieee80211_is_auth(hdr->frame_control))
+               return false;
+
+       /* qca99x0 based FW delivers broadcast or multicast management frames
+        * (ex: group privacy action frames in mesh) as encrypted payload.
+        */
+       if (is_multicast_ether_addr(ieee80211_get_DA(hdr)) &&
+           ar->hw_params.sw_decrypt_mcast_mgmt)
+               return false;
+
+       return true;
+}
+
 int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb)
 {
        struct wmi_mgmt_rx_ev_arg arg = {};
@@ -2329,11 +2352,7 @@ int ath10k_wmi_event_mgmt_rx(struct ath10k *ar, struct sk_buff *skb)
 
        ath10k_wmi_handle_wep_reauth(ar, skb, status);
 
-       /* FW delivers WEP Shared Auth frame with Protected Bit set and
-        * encrypted payload. However in case of PMF it delivers decrypted
-        * frames with Protected Bit set. */
-       if (ieee80211_has_protected(hdr->frame_control) &&
-           !ieee80211_is_auth(hdr->frame_control)) {
+       if (ath10k_wmi_rx_is_decrypted(ar, hdr)) {
                status->flag |= RX_FLAG_DECRYPTED;
 
                if (!ieee80211_is_action(hdr->frame_control) &&