iwlagn: simplify the iwl_device_cmd layout

This simplifies both the transport layer and the upper layer.

Kill the union in the device command, which avoids the funny syntax
we had: cmd->cmd.payload.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 12 insertions, 16 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
index 4aa414a63d6b..abb702da700d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
@@ -322,7 +322,7 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
                 goto drop_unlock_sta;
 
         memset(dev_cmd, 0, sizeof(*dev_cmd));
-        tx_cmd = &dev_cmd->cmd.tx;
+        tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
 
         /* Copy MAC header from skb into command buffer */
         memcpy(tx_cmd->hdr, hdr, hdr_len);
diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index 7028f907e600..580a4d702ff3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -127,7 +127,7 @@ int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb,
 {
         struct iwl_rx_packet *pkt = rxb_addr(rxb);
         struct iwl_addsta_cmd *addsta =
-                (struct iwl_addsta_cmd *)cmd->cmd.payload;
+                (struct iwl_addsta_cmd *) cmd->payload;
 
         return iwl_process_add_sta_resp(priv, addsta, pkt);
 }
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c
index 48ef6c25d5bc..ee7059dcbbcb 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c
@@ -59,13 +59,15 @@ void iwl_trans_txq_update_byte_cnt_tbl(struct iwl_trans *trans,
         u8 sta_id = 0;
         u16 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
         __le16 bc_ent;
+        struct iwl_tx_cmd *tx_cmd =
+                (struct iwl_tx_cmd *) txq->cmd[txq->q.write_ptr]->payload;
 
         scd_bc_tbl = trans_pcie->scd_bc_tbls.addr;
 
         WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
 
-        sta_id = txq->cmd[txq->q.write_ptr]->cmd.tx.sta_id;
-        sec_ctl = txq->cmd[txq->q.write_ptr]->cmd.tx.sec_ctl;
+        sta_id = tx_cmd->sta_id;
+        sec_ctl = tx_cmd->sec_ctl;
 
         switch (sec_ctl & TX_CMD_SEC_MSK) {
         case TX_CMD_SEC_CCM:
@@ -353,11 +355,13 @@ static void iwlagn_txq_inval_byte_cnt_tbl(struct iwl_trans *trans,
         int read_ptr = txq->q.read_ptr;
         u8 sta_id = 0;
         __le16 bc_ent;
+        struct iwl_tx_cmd *tx_cmd =
+                (struct iwl_tx_cmd *) txq->cmd[txq->q.read_ptr]->payload;
 
         WARN_ON(read_ptr >= TFD_QUEUE_SIZE_MAX);
 
         if (txq_id != trans->shrd->cmd_queue)
-                sta_id = txq->cmd[read_ptr]->cmd.tx.sta_id;
+                sta_id = tx_cmd->sta_id;
 
         bc_ent = cpu_to_le16(1 | (sta_id << 12));
         scd_bc_tbl[txq_id].tfd_offset[read_ptr] = bc_ent;
@@ -773,7 +777,7 @@ static int iwl_enqueue_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
 
         /* and copy the data that needs to be copied */
 
-        cmd_dest = &out_cmd->cmd.payload[0];
+        cmd_dest = out_cmd->payload;
         for (i = 0; i < IWL_MAX_CMD_TFDS; i++) {
                 if (!cmd->len[i])
                         continue;
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
index ca13eebbdb4f..dbb7eb3715c4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
@@ -1043,7 +1043,7 @@ static int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
         struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-        struct iwl_tx_cmd *tx_cmd = &dev_cmd->cmd.tx;
+        struct iwl_tx_cmd *tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
         struct iwl_cmd_meta *out_meta;
         struct iwl_tx_queue *txq;
         struct iwl_queue *q;
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index ddb7741bed66..c5923125c3f9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -97,15 +97,7 @@ enum {
  */
 struct iwl_device_cmd {
         struct iwl_cmd_header hdr;      /* uCode API */
-        union {
-                u32 flags;
-                u8 val8;
-                u16 val16;
-                u32 val32;
-                struct iwl_tx_cmd tx;
-                struct iwl6000_channel_switch_cmd chswitch;
-                u8 payload[DEF_CMD_PAYLOAD_SIZE];
-        } __packed cmd;
+        u8 payload[DEF_CMD_PAYLOAD_SIZE];
 } __packed;
 
 #define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))