iwlwifi: pcie: keep trans instead of trans_pcie in iwl_txq

We used both the trans and the trans_pcie structures in
iwl_txq, so we can keep the trans structure instead.  This
helps with the refactoring of txq code out of pcie.
Signed-off-by: NMordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200529092401.1f826d34339e.I23182a59bfbe089a1f659742d6fee6f64d2ed08c@changeid

drivers/net/wireless/intel/iwlwifi/pcie/internal.h

@@ -332,7 +332,7 @@ struct iwl_pcie_first_tb_buf {
  * @entries: transmit entries (driver state)
  * @lock: queue lock
  * @stuck_timer: timer that fires if queue gets stuck
- * @trans_pcie: pointer back to transport (for timer)
+ * @trans: pointer back to transport (for timer)
  * @need_update: indicates need to update read/write index
  * @ampdu: true if this queue is an ampdu queue for an specific RA/TID
  * @wd_timeout: queue watchdog timeout (jiffies) - per queue
@@ -371,7 +371,7 @@ struct iwl_txq {
 	spinlock_t lock;
 	unsigned long frozen_expiry_remainder;
 	struct timer_list stuck_timer;
-	struct iwl_trans_pcie *trans_pcie;
+	struct iwl_trans *trans;
 	bool need_update;
 	bool frozen;
 	bool ampdu;

drivers/net/wireless/intel/iwlwifi/pcie/tx.c

@@ -183,8 +183,7 @@ void iwl_pcie_free_dma_ptr(struct iwl_trans *trans, struct iwl_dma_ptr *ptr)
 static void iwl_pcie_txq_stuck_timer(struct timer_list *t)
 {
 	struct iwl_txq *txq = from_timer(txq, t, stuck_timer);
-	struct iwl_trans_pcie *trans_pcie = txq->trans_pcie;
-	struct iwl_trans *trans = iwl_trans_pcie_get_trans(trans_pcie);
+	struct iwl_trans *trans = txq->trans;
 
 	spin_lock(&txq->lock);
 	/* check if triggered erroneously */
@@ -535,7 +534,7 @@ int iwl_pcie_txq_alloc(struct iwl_trans *trans, struct iwl_txq *txq,
 		tfd_sz = trans_pcie->tfd_size * slots_num;
 
 	timer_setup(&txq->stuck_timer, iwl_pcie_txq_stuck_timer, 0);
-	txq->trans_pcie = trans_pcie;
+	txq->trans = trans;
 
 	txq->n_window = slots_num;
 
@@ -2129,7 +2128,8 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb,
 				   u16 tb1_len)
 {
 	struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
-	struct iwl_trans_pcie *trans_pcie = txq->trans_pcie;
+	struct iwl_trans_pcie *trans_pcie =
+		IWL_TRANS_GET_PCIE_TRANS(txq->trans);
 	struct ieee80211_hdr *hdr = (void *)skb->data;
 	unsigned int snap_ip_tcp_hdrlen, ip_hdrlen, total_len, hdr_room;
 	unsigned int mss = skb_shinfo(skb)->gso_size;