iwlagn: move hcmd_lock to transport layer

Since it is needed for host commands only, it is needed in transport layer only
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>

drivers/net/wireless/iwlwifi/iwl-agn.c

@@ -3059,7 +3059,6 @@ static int iwl_init_drv(struct iwl_priv *priv)
 	int ret;
 
 	spin_lock_init(&priv->shrd->sta_lock);
-	spin_lock_init(&priv->hcmd_lock);
 
 	mutex_init(&priv->shrd->mutex);
 

drivers/net/wireless/iwlwifi/iwl-dev.h

@@ -1178,7 +1178,6 @@ struct iwl_priv {
 	u8 mgmt_tx_ant;
 
 	/* spinlock */
-	spinlock_t hcmd_lock;	/* protect hcmd */
 	spinlock_t reg_lock;	/* protect hw register access */
 
 	/*TODO: remove these pointers - use bus(priv) instead */

drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c

@@ -601,10 +601,10 @@ static int iwl_enqueue_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
 		return -EIO;
 	}
 
-	spin_lock_irqsave(&priv->hcmd_lock, flags);
+	spin_lock_irqsave(&trans->hcmd_lock, flags);
 
 	if (iwl_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
-		spin_unlock_irqrestore(&priv->hcmd_lock, flags);
+		spin_unlock_irqrestore(&trans->hcmd_lock, flags);
 
 		IWL_ERR(trans, "No space in command queue\n");
 		is_ct_kill = iwl_check_for_ct_kill(priv);
@@ -713,7 +713,7 @@ static int iwl_enqueue_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
 	iwl_txq_update_write_ptr(priv, txq);
 
  out:
-	spin_unlock_irqrestore(&priv->hcmd_lock, flags);
+	spin_unlock_irqrestore(&trans->hcmd_lock, flags);
 	return idx;
 }
 
@@ -796,7 +796,7 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 	} else if (meta->callback)
 		meta->callback(priv, cmd, pkt);
 
-	spin_lock_irqsave(&priv->hcmd_lock, flags);
+	spin_lock_irqsave(&trans->hcmd_lock, flags);
 
 	iwl_hcmd_queue_reclaim(priv, txq_id, index);
 
@@ -809,7 +809,7 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 
 	meta->flags = 0;
 
-	spin_unlock_irqrestore(&priv->hcmd_lock, flags);
+	spin_unlock_irqrestore(&trans->hcmd_lock, flags);
 }
 
 const char *get_cmd_string(u8 cmd)

drivers/net/wireless/iwlwifi/iwl-trans.c

@@ -1284,6 +1284,7 @@ static struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd)
 		iwl_trans->ops = &trans_ops_pcie;
 		iwl_trans->shrd = shrd;
 		trans_pcie->trans = iwl_trans;
+		spin_lock_init(&iwl_trans->hcmd_lock);
 	}
 
 	return iwl_trans;

drivers/net/wireless/iwlwifi/iwl-trans.h

@@ -146,10 +146,12 @@ struct iwl_trans_ops {
  * struct iwl_trans - transport common data
  * @ops - pointer to iwl_trans_ops
  * @shrd - pointer to iwl_shared which holds shared data from the upper layer
+ * @hcmd_lock: protects HCMD
  */
 struct iwl_trans {
 	const struct iwl_trans_ops *ops;
 	struct iwl_shared *shrd;
+	spinlock_t hcmd_lock;
 
 	/* pointer to trans specific struct */
 	/*Ensure that this pointer will always be aligned to sizeof pointer */