iwlwifi: refactor ieee80211_get_qos_ctrl

This patch refactors ieee80211_get_qos_ctrl function and its usage
in iwlwifi drivers. Function is moved as inline into iwl-helpers.h.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 9 insertions, 8 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
index ce70f2b29b61..071c7b6ebef2 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
@@ -282,14 +282,20 @@ static void rs_tl_rm_old_stats(struct iwl4965_traffic_load *tl, u32 curr_time)
  *      increment traffic load value for tid and also remove
  *      any old values if passed the certain time period
  */
-static void rs_tl_add_packet(struct iwl4965_lq_sta *lq_data, u8 tid)
+static void rs_tl_add_packet(struct iwl4965_lq_sta *lq_data,
+                             struct ieee80211_hdr *hdr)
 {
         u32 curr_time = jiffies_to_msecs(jiffies);
         u32 time_diff;
         s32 index;
         struct iwl4965_traffic_load *tl = NULL;
+        u16 fc = le16_to_cpu(hdr->frame_control);
+        u8 tid;
 
-        if (tid >= TID_MAX_LOAD_COUNT)
+        if (ieee80211_is_qos_data(fc)) {
+                u8 *qc = ieee80211_get_qos_ctrl(hdr, ieee80211_get_hdrlen(fc));
+                tid = qc[0] & 0xf;
+        } else
                 return;
 
         tl = &lq_data->load[tid];
@@ -1670,7 +1676,6 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
         u16 high_low;
 #ifdef CONFIG_IWL4965_HT
         u8 tid = MAX_TID_COUNT;
-        __le16 *qc;
 #endif
 
         IWL_DEBUG_RATE("rate scale calculate new rate for skb\n");
@@ -1693,11 +1698,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
         lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv;
 
 #ifdef CONFIG_IWL4965_HT
-        qc = ieee80211_get_qos_ctrl(hdr);
-        if (qc) {
-                tid = (u8)(le16_to_cpu(*qc) & 0xf);
-                rs_tl_add_packet(lq_sta, tid);
-        }
+        rs_tl_add_packet(lq_sta, hdr);
 #endif
         /*
          * Select rate-scale / modulation-mode table to work with in