ath9k: Fix interface combinations for multi-channel concurrency

Currently mac80211 does not support WDS and DFS with channel context
drivers. So advertise these features only when the driver is not
supporting channel context and modparam "use_chanctx" is introduced
for preparing channel context support in ath9k.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 21 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 1af77081181e..0246b990fe87 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -61,6 +61,10 @@ static int ath9k_ps_enable;
 module_param_named(ps_enable, ath9k_ps_enable, int, 0444);
 MODULE_PARM_DESC(ps_enable, "Enable WLAN PowerSave");
 
+static int ath9k_use_chanctx;
+module_param_named(use_chanctx, ath9k_use_chanctx, int, 0444);
+MODULE_PARM_DESC(use_chanctx, "Enable channel context for concurrency");
+
 bool is_ath9k_unloaded;
 
 #ifdef CONFIG_MAC80211_LEDS
@@ -646,8 +650,7 @@ static void ath9k_init_txpower_limits(struct ath_softc *sc)
 }
 
 static const struct ieee80211_iface_limit if_limits[] = {
-        { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
-                                 BIT(NL80211_IFTYPE_WDS) },
+        { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) },
         { .max = 8,     .types =
 #ifdef CONFIG_MAC80211_MESH
                                  BIT(NL80211_IFTYPE_MESH_POINT) |
@@ -657,6 +660,10 @@ static const struct ieee80211_iface_limit if_limits[] = {
                                  BIT(NL80211_IFTYPE_P2P_GO) },
 };
 
+static const struct ieee80211_iface_limit wds_limits[] = {
+        { .max = 2048,  .types = BIT(NL80211_IFTYPE_WDS) },
+};
+
 static const struct ieee80211_iface_limit if_dfs_limits[] = {
         { .max = 1,     .types = BIT(NL80211_IFTYPE_AP) |
 #ifdef CONFIG_MAC80211_MESH
@@ -673,6 +680,13 @@ static const struct ieee80211_iface_combination if_comb[] = {
                 .num_different_channels = 1,
                 .beacon_int_infra_match = true,
         },
+        {
+                .limits = wds_limits,
+                .n_limits = ARRAY_SIZE(wds_limits),
+                .max_interfaces = 2048,
+                .num_different_channels = 1,
+                .beacon_int_infra_match = true,
+        },
 #ifdef CONFIG_ATH9K_DFS_CERTIFIED
         {
                 .limits = if_dfs_limits,
@@ -722,12 +736,15 @@ static void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
                         BIT(NL80211_IFTYPE_P2P_GO) |
                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
                         BIT(NL80211_IFTYPE_AP) |
-                        BIT(NL80211_IFTYPE_WDS) |
                         BIT(NL80211_IFTYPE_STATION) |
                         BIT(NL80211_IFTYPE_ADHOC) |
                         BIT(NL80211_IFTYPE_MESH_POINT);
                 hw->wiphy->iface_combinations = if_comb;
-                hw->wiphy->n_iface_combinations = ARRAY_SIZE(if_comb);
+                if (!ath9k_use_chanctx) {
+                        hw->wiphy->n_iface_combinations = ARRAY_SIZE(if_comb);
+                        hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_WDS);
+                } else
+                        hw->wiphy->n_iface_combinations = 1;
         }
 
         hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;