iwlagn: don't use CCK rates for P2P interfaces

P2P interfaces must not use CCK rates, only OFDM
rates are allowed. To set this up, we need to set
up the broadcast station to start with 6M instead
of starting with 1M.

Since the interface type can change, also reset
the broadcast station when RXON changes.

This will affect beacons as well.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

1 files changed, 11 insertions, 6 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c
index 0bd722cee5ae..9b32f83f0b7f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c
@@ -35,7 +35,7 @@
 #include "iwl-agn.h"
 
 static struct iwl_link_quality_cmd *
-iwl_sta_alloc_lq(struct iwl_priv *priv, u8 sta_id)
+iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id)
 {
         int i, r;
         struct iwl_link_quality_cmd *link_cmd;
@@ -47,10 +47,15 @@ iwl_sta_alloc_lq(struct iwl_priv *priv, u8 sta_id)
                 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
                 return NULL;
         }
+
+        lockdep_assert_held(&priv->mutex);
+
         /* Set up the rate scaling to start at selected rate, fall back
          * all the way down to 1M in IEEE order, and then spin on 1M */
         if (priv->band == IEEE80211_BAND_5GHZ)
                 r = IWL_RATE_6M_INDEX;
+        else if (ctx && ctx->vif && ctx->vif->p2p)
+                r = IWL_RATE_6M_INDEX;
         else
                 r = IWL_RATE_1M_INDEX;
 
@@ -115,7 +120,7 @@ int iwlagn_add_bssid_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx
         spin_unlock_irqrestore(&priv->sta_lock, flags);
 
         /* Set up default rate scaling table in device's station table */
-        link_cmd = iwl_sta_alloc_lq(priv, sta_id);
+        link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
         if (!link_cmd) {
                 IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n",
                         addr);
@@ -554,7 +559,7 @@ int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
         priv->stations[sta_id].used |= IWL_STA_BCAST;
         spin_unlock_irqrestore(&priv->sta_lock, flags);
 
-        link_cmd = iwl_sta_alloc_lq(priv, sta_id);
+        link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
         if (!link_cmd) {
                 IWL_ERR(priv,
                         "Unable to initialize rate scaling for bcast station.\n");
@@ -574,14 +579,14 @@ int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
  * Only used by iwlagn. Placed here to have all bcast station management
  * code together.
  */
-static int iwl_update_bcast_station(struct iwl_priv *priv,
-                                    struct iwl_rxon_context *ctx)
+int iwl_update_bcast_station(struct iwl_priv *priv,
+                             struct iwl_rxon_context *ctx)
 {
         unsigned long flags;
         struct iwl_link_quality_cmd *link_cmd;
         u8 sta_id = ctx->bcast_sta_id;
 
-        link_cmd = iwl_sta_alloc_lq(priv, sta_id);
+        link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
         if (!link_cmd) {
                 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
                 return -ENOMEM;