iwlwifi: clean up last_phy_res

The last_phy_res[100] variable is used in an odd
way. The first byte of it is used as a flag, and
the rest as the data. Thus, the array need only
be 61 bytes, since it is just the flag and a
struct iwl_rx_phy_res (which is 60 bytes).

Clean this up by splitting the variable into two:
last_phy_res and last_phy_res_valid, using correct
types for both (struct and bool). While doing all
this also move the variables to the _agn part of
the hw-specific union since they only apply to
A-MPDUs.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

2 files changed, 8 insertions, 6 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
index 49e20f1acb7c..7f27a945c187 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
@@ -1001,11 +1001,11 @@ void iwlagn_rx_reply_rx(struct iwl_priv *priv,
                                 phy_res->cfg_phy_cnt + len);
                 ampdu_status = le32_to_cpu(rx_pkt_status);
         } else {
-                if (!priv->last_phy_res[0]) {
+                if (!priv->_agn.last_phy_res_valid) {
                         IWL_ERR(priv, "MPDU frame without cached PHY data\n");
                         return;
                 }
-                phy_res = (struct iwl_rx_phy_res *)&priv->last_phy_res[1];
+                phy_res = &priv->_agn.last_phy_res;
                 amsdu = (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
                 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
                 len = le16_to_cpu(amsdu->byte_count);
@@ -1094,10 +1094,10 @@ void iwlagn_rx_reply_rx(struct iwl_priv *priv,
 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
  * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
 void iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
-                                    struct iwl_rx_mem_buffer *rxb)
+                            struct iwl_rx_mem_buffer *rxb)
 {
         struct iwl_rx_packet *pkt = rxb_addr(rxb);
-        priv->last_phy_res[0] = 1;
-        memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
+        priv->_agn.last_phy_res_valid = true;
+        memcpy(&priv->_agn.last_phy_res, pkt->u.raw,
                sizeof(struct iwl_rx_phy_res));
 }
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 95c2bc3c79ed..9466e909f553 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1120,7 +1120,6 @@ struct iwl_priv {
         __le16 sensitivity_tbl[HD_TABLE_SIZE];
 
         struct iwl_ht_config current_ht_config;
-        u8 last_phy_res[100];
 
         /* Rate scaling data */
         u8 retry_rate;
@@ -1237,6 +1236,9 @@ struct iwl_priv {
                          * no AGGREGATION
                          */
                         u8 agg_tids_count;
+
+                        struct iwl_rx_phy_res last_phy_res;
+                        bool last_phy_res_valid;
                 } _agn;
 #endif
         };