rt2x00: Replace open coded interface checking with interface combinations.

Mac80211 has formal infrastructure to specify which interface combinations
are supported. Make use of this facility in favor of open coding it
ourselves.
So far we only have to specify we can support multiple AP interfaces,
no other combinations are supported.

Inspired by an earlier patch from Paul Fertser.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Cc: Paul Fertser <fercerpav@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index 10cf67267775..69097d1faeb6 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -1118,6 +1118,34 @@ void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
         rt2x00dev->intf_associated = 0;
 }
 
+static inline void rt2x00lib_set_if_combinations(struct rt2x00_dev *rt2x00dev)
+{
+        struct ieee80211_iface_limit *if_limit;
+        struct ieee80211_iface_combination *if_combination;
+
+        /*
+         * Build up AP interface limits structure.
+         */
+        if_limit = &rt2x00dev->if_limits_ap;
+        if_limit->max = rt2x00dev->ops->max_ap_intf;
+        if_limit->types = BIT(NL80211_IFTYPE_AP);
+
+        /*
+         * Build up AP interface combinations structure.
+         */
+        if_combination = &rt2x00dev->if_combinations[IF_COMB_AP];
+        if_combination->limits = if_limit;
+        if_combination->n_limits = 1;
+        if_combination->max_interfaces = if_limit->max;
+        if_combination->num_different_channels = 1;
+
+        /*
+         * Finally, specify the possible combinations to mac80211.
+         */
+        rt2x00dev->hw->wiphy->iface_combinations = rt2x00dev->if_combinations;
+        rt2x00dev->hw->wiphy->n_iface_combinations = 1;
+}
+
 /*
  * driver allocation handlers.
  */
@@ -1126,6 +1154,11 @@ int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
         int retval = -ENOMEM;
 
         /*
+         * Set possible interface combinations.
+         */
+        rt2x00lib_set_if_combinations(rt2x00dev);
+
+        /*
          * Allocate the driver data memory, if necessary.
          */
         if (rt2x00dev->ops->drv_data_size > 0) {