23 					  struct iwl_txq *txq, u16 byte_cnt,  in iwl_pcie_gen2_update_byte_tbl()  argument
26 	int idx = iwl_txq_get_cmd_index(txq, txq->write_ptr);  in iwl_pcie_gen2_update_byte_tbl()
31 	if (WARN(idx >= txq->n_window, "%d >= %d\n", idx, txq->n_window))  in iwl_pcie_gen2_update_byte_tbl()
47 		struct iwl_gen3_bc_tbl_entry *scd_bc_tbl_gen3 = txq->bc_tbl.addr;  in iwl_pcie_gen2_update_byte_tbl()
55 		struct iwlagn_scd_bc_tbl *scd_bc_tbl = txq->bc_tbl.addr;  in iwl_pcie_gen2_update_byte_tbl()
69 void iwl_txq_inc_wr_ptr(struct iwl_trans *trans, struct iwl_txq *txq)  in iwl_txq_inc_wr_ptr()  argument
71 	lockdep_assert_held(&txq->lock);  in iwl_txq_inc_wr_ptr()
73 	IWL_DEBUG_TX(trans, "Q:%d WR: 0x%x\n", txq->id, txq->write_ptr);  in iwl_txq_inc_wr_ptr()
79 	iwl_write32(trans, HBUS_TARG_WRPTR, txq->write_ptr | (txq->id << 16));  in iwl_txq_inc_wr_ptr()
162 void iwl_txq_gen2_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq)  in iwl_txq_gen2_free_tfd()  argument
167 	int idx = iwl_txq_get_cmd_index(txq, txq->read_ptr);  in iwl_txq_gen2_free_tfd()
170 	lockdep_assert_held(&txq->lock);  in iwl_txq_gen2_free_tfd()
172 	if (!txq->entries)  in iwl_txq_gen2_free_tfd()
175 	iwl_txq_gen2_tfd_unmap(trans, &txq->entries[idx].meta,  in iwl_txq_gen2_free_tfd()
176 			       iwl_txq_get_tfd(trans, txq, idx));  in iwl_txq_gen2_free_tfd()
178 	skb = txq->entries[idx].skb;  in iwl_txq_gen2_free_tfd()
186 		txq->entries[idx].skb = NULL;  in iwl_txq_gen2_free_tfd()
465 					 struct iwl_txq *txq,  in iwl_txq_gen2_build_tx_amsdu()  argument
472 	int idx = iwl_txq_get_cmd_index(txq, txq->write_ptr);  in iwl_txq_gen2_build_tx_amsdu()
473 	struct iwl_tfh_tfd *tfd = iwl_txq_get_tfd(trans, txq, idx);  in iwl_txq_gen2_build_tx_amsdu()
478 	tb_phys = iwl_txq_get_first_tb_dma(txq, idx);  in iwl_txq_gen2_build_tx_amsdu()
514 	memcpy(&txq->first_tb_bufs[idx], dev_cmd, IWL_FIRST_TB_SIZE);  in iwl_txq_gen2_build_tx_amsdu()
552 				   struct iwl_txq *txq,  in iwl_txq_gen2_build_tx()  argument
560 	int idx = iwl_txq_get_cmd_index(txq, txq->write_ptr);  in iwl_txq_gen2_build_tx()
561 	struct iwl_tfh_tfd *tfd = iwl_txq_get_tfd(trans, txq, idx);  in iwl_txq_gen2_build_tx()
567 	tb_phys = iwl_txq_get_first_tb_dma(txq, idx);  in iwl_txq_gen2_build_tx()
570 	memcpy(&txq->first_tb_bufs[idx], dev_cmd, IWL_FIRST_TB_SIZE);  in iwl_txq_gen2_build_tx()
647 					   struct iwl_txq *txq,  in iwl_txq_gen2_build_tfd()  argument
653 	int idx = iwl_txq_get_cmd_index(txq, txq->write_ptr);  in iwl_txq_gen2_build_tfd()
654 	struct iwl_tfh_tfd *tfd = iwl_txq_get_tfd(trans, txq, idx);  in iwl_txq_gen2_build_tfd()
687 		return iwl_txq_gen2_build_tx_amsdu(trans, txq, dev_cmd, skb,  in iwl_txq_gen2_build_tfd()
689 	return iwl_txq_gen2_build_tx(trans, txq, dev_cmd, skb, out_meta,  in iwl_txq_gen2_build_tfd()
726 	struct iwl_txq *txq = trans->txqs.txq[txq_id];  in iwl_txq_gen2_tx()  local
744 	spin_lock(&txq->lock);  in iwl_txq_gen2_tx()
746 	if (iwl_txq_space(trans, txq) < txq->high_mark) {  in iwl_txq_gen2_tx()
747 		iwl_txq_stop(trans, txq);  in iwl_txq_gen2_tx()
750 		if (unlikely(iwl_txq_space(trans, txq) < 3)) {  in iwl_txq_gen2_tx()
757 			__skb_queue_tail(&txq->overflow_q, skb);  in iwl_txq_gen2_tx()
758 			spin_unlock(&txq->lock);  in iwl_txq_gen2_tx()
763 	idx = iwl_txq_get_cmd_index(txq, txq->write_ptr);  in iwl_txq_gen2_tx()
766 	txq->entries[idx].skb = skb;  in iwl_txq_gen2_tx()
767 	txq->entries[idx].cmd = dev_cmd;  in iwl_txq_gen2_tx()
774 	out_meta = &txq->entries[idx].meta;  in iwl_txq_gen2_tx()
777 	tfd = iwl_txq_gen2_build_tfd(trans, txq, dev_cmd, skb, out_meta);  in iwl_txq_gen2_tx()
779 		spin_unlock(&txq->lock);  in iwl_txq_gen2_tx()
796 	iwl_pcie_gen2_update_byte_tbl(trans, txq, cmd_len,  in iwl_txq_gen2_tx()
800 	if (txq->read_ptr == txq->write_ptr && txq->wd_timeout)  in iwl_txq_gen2_tx()
801 		mod_timer(&txq->stuck_timer, jiffies + txq->wd_timeout);  in iwl_txq_gen2_tx()
804 	txq->write_ptr = iwl_txq_inc_wrap(trans, txq->write_ptr);  in iwl_txq_gen2_tx()
805 	iwl_txq_inc_wr_ptr(trans, txq);  in iwl_txq_gen2_tx()
810 	spin_unlock(&txq->lock);  in iwl_txq_gen2_tx()
821 	struct iwl_txq *txq = trans->txqs.txq[txq_id];  in iwl_txq_gen2_unmap()  local
823 	spin_lock_bh(&txq->lock);  in iwl_txq_gen2_unmap()
824 	while (txq->write_ptr != txq->read_ptr) {  in iwl_txq_gen2_unmap()
826 				   txq_id, txq->read_ptr);  in iwl_txq_gen2_unmap()
829 			int idx = iwl_txq_get_cmd_index(txq, txq->read_ptr);  in iwl_txq_gen2_unmap()
830 			struct sk_buff *skb = txq->entries[idx].skb;  in iwl_txq_gen2_unmap()
835 		iwl_txq_gen2_free_tfd(trans, txq);  in iwl_txq_gen2_unmap()
836 		txq->read_ptr = iwl_txq_inc_wrap(trans, txq->read_ptr);  in iwl_txq_gen2_unmap()
839 	while (!skb_queue_empty(&txq->overflow_q)) {  in iwl_txq_gen2_unmap()
840 		struct sk_buff *skb = __skb_dequeue(&txq->overflow_q);  in iwl_txq_gen2_unmap()
845 	spin_unlock_bh(&txq->lock);  in iwl_txq_gen2_unmap()
848 	iwl_wake_queue(trans, txq);  in iwl_txq_gen2_unmap()
852 				     struct iwl_txq *txq)  in iwl_txq_gen2_free_memory()  argument
857 	if (txq->tfds) {  in iwl_txq_gen2_free_memory()
859 				  trans->txqs.tfd.size * txq->n_window,  in iwl_txq_gen2_free_memory()
860 				  txq->tfds, txq->dma_addr);  in iwl_txq_gen2_free_memory()
862 				  sizeof(*txq->first_tb_bufs) * txq->n_window,  in iwl_txq_gen2_free_memory()
863 				  txq->first_tb_bufs, txq->first_tb_dma);  in iwl_txq_gen2_free_memory()
866 	kfree(txq->entries);  in iwl_txq_gen2_free_memory()
867 	if (txq->bc_tbl.addr)  in iwl_txq_gen2_free_memory()
869 			      txq->bc_tbl.addr, txq->bc_tbl.dma);  in iwl_txq_gen2_free_memory()
870 	kfree(txq);  in iwl_txq_gen2_free_memory()
883 	struct iwl_txq *txq;  in iwl_txq_gen2_free()  local
890 	txq = trans->txqs.txq[txq_id];  in iwl_txq_gen2_free()
892 	if (WARN_ON(!txq))  in iwl_txq_gen2_free()
899 		for (i = 0; i < txq->n_window; i++) {  in iwl_txq_gen2_free()
900 			kfree_sensitive(txq->entries[i].cmd);  in iwl_txq_gen2_free()
901 			kfree_sensitive(txq->entries[i].free_buf);  in iwl_txq_gen2_free()
903 	del_timer_sync(&txq->stuck_timer);  in iwl_txq_gen2_free()
905 	iwl_txq_gen2_free_memory(trans, txq);  in iwl_txq_gen2_free()
907 	trans->txqs.txq[txq_id] = NULL;  in iwl_txq_gen2_free()
938 int iwl_txq_init(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num,  in iwl_txq_init()  argument
945 	txq->need_update = false;  in iwl_txq_init()
955 	ret = iwl_queue_init(txq, slots_num);  in iwl_txq_init()
959 	spin_lock_init(&txq->lock);  in iwl_txq_init()
964 		lockdep_set_class(&txq->lock, &iwl_txq_cmd_queue_lock_class);  in iwl_txq_init()
967 	__skb_queue_head_init(&txq->overflow_q);  in iwl_txq_init()
990 void iwl_txq_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq)  in iwl_txq_log_scd_error()  argument
992 	u32 txq_id = txq->id;  in iwl_txq_log_scd_error()
999 			txq->read_ptr, txq->write_ptr);  in iwl_txq_log_scd_error()
1011 		jiffies_to_msecs(txq->wd_timeout),  in iwl_txq_log_scd_error()
1012 		txq->read_ptr, txq->write_ptr,  in iwl_txq_log_scd_error()
1022 	struct iwl_txq *txq = from_timer(txq, t, stuck_timer);  in iwl_txq_stuck_timer()  local
1023 	struct iwl_trans *trans = txq->trans;  in iwl_txq_stuck_timer()
1025 	spin_lock(&txq->lock);  in iwl_txq_stuck_timer()
1027 	if (txq->read_ptr == txq->write_ptr) {  in iwl_txq_stuck_timer()
1028 		spin_unlock(&txq->lock);  in iwl_txq_stuck_timer()
1031 	spin_unlock(&txq->lock);  in iwl_txq_stuck_timer()
1033 	iwl_txq_log_scd_error(trans, txq);  in iwl_txq_stuck_timer()
1047 int iwl_txq_alloc(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num,  in iwl_txq_alloc()  argument
1059 	if (WARN_ON(txq->entries || txq->tfds))  in iwl_txq_alloc()
1064 	timer_setup(&txq->stuck_timer, iwl_txq_stuck_timer, 0);  in iwl_txq_alloc()
1065 	txq->trans = trans;  in iwl_txq_alloc()
1067 	txq->n_window = slots_num;  in iwl_txq_alloc()
1069 	txq->entries = kcalloc(slots_num,  in iwl_txq_alloc()
1073 	if (!txq->entries)  in iwl_txq_alloc()
1078 			txq->entries[i].cmd =  in iwl_txq_alloc()
1081 			if (!txq->entries[i].cmd)  in iwl_txq_alloc()
1087 	txq->tfds = dma_alloc_coherent(trans->dev, tfd_sz,  in iwl_txq_alloc()
1088 				       &txq->dma_addr, GFP_KERNEL);  in iwl_txq_alloc()
1089 	if (!txq->tfds)  in iwl_txq_alloc()
1092 	BUILD_BUG_ON(sizeof(*txq->first_tb_bufs) != IWL_FIRST_TB_SIZE_ALIGN);  in iwl_txq_alloc()
1094 	tb0_buf_sz = sizeof(*txq->first_tb_bufs) * slots_num;  in iwl_txq_alloc()
1096 	txq->first_tb_bufs = dma_alloc_coherent(trans->dev, tb0_buf_sz,  in iwl_txq_alloc()
1097 						&txq->first_tb_dma,  in iwl_txq_alloc()
1099 	if (!txq->first_tb_bufs)  in iwl_txq_alloc()
1103 		void *tfd = iwl_txq_get_tfd(trans, txq, i);  in iwl_txq_alloc()
1113 	dma_free_coherent(trans->dev, tfd_sz, txq->tfds, txq->dma_addr);  in iwl_txq_alloc()
1114 	txq->tfds = NULL;  in iwl_txq_alloc()
1116 	if (txq->entries && cmd_queue)  in iwl_txq_alloc()
1118 			kfree(txq->entries[i].cmd);  in iwl_txq_alloc()
1119 	kfree(txq->entries);  in iwl_txq_alloc()
1120 	txq->entries = NULL;  in iwl_txq_alloc()
1129 	struct iwl_txq *txq;  in iwl_txq_dyn_alloc_dma()  local
1140 	txq = kzalloc(sizeof(*txq), GFP_KERNEL);  in iwl_txq_dyn_alloc_dma()
1141 	if (!txq)  in iwl_txq_dyn_alloc_dma()
1144 	txq->bc_tbl.addr = dma_pool_alloc(trans->txqs.bc_pool, GFP_KERNEL,  in iwl_txq_dyn_alloc_dma()
1145 					  &txq->bc_tbl.dma);  in iwl_txq_dyn_alloc_dma()
1146 	if (!txq->bc_tbl.addr) {  in iwl_txq_dyn_alloc_dma()
1148 		kfree(txq);  in iwl_txq_dyn_alloc_dma()
1152 	ret = iwl_txq_alloc(trans, txq, size, false);  in iwl_txq_dyn_alloc_dma()
1157 	ret = iwl_txq_init(trans, txq, size, false);  in iwl_txq_dyn_alloc_dma()
1163 	txq->wd_timeout = msecs_to_jiffies(timeout);  in iwl_txq_dyn_alloc_dma()
1165 	return txq;  in iwl_txq_dyn_alloc_dma()
1168 	iwl_txq_gen2_free_memory(trans, txq);  in iwl_txq_dyn_alloc_dma()
1172 static int iwl_txq_alloc_response(struct iwl_trans *trans, struct iwl_txq *txq,  in iwl_txq_alloc_response()  argument
1189 	if (qid >= ARRAY_SIZE(trans->txqs.txq)) {  in iwl_txq_alloc_response()
1201 	if (WARN_ONCE(trans->txqs.txq[qid],  in iwl_txq_alloc_response()
1207 	txq->id = qid;  in iwl_txq_alloc_response()
1208 	trans->txqs.txq[qid] = txq;  in iwl_txq_alloc_response()
1212 	txq->read_ptr = wr_ptr;  in iwl_txq_alloc_response()
1213 	txq->write_ptr = wr_ptr;  in iwl_txq_alloc_response()
1222 	iwl_txq_gen2_free_memory(trans, txq);  in iwl_txq_alloc_response()
1229 	struct iwl_txq *txq;  in iwl_txq_dyn_alloc()  local
1243 	txq = iwl_txq_dyn_alloc_dma(trans, size, timeout);  in iwl_txq_dyn_alloc()
1244 	if (IS_ERR(txq))  in iwl_txq_dyn_alloc()
1245 		return PTR_ERR(txq);  in iwl_txq_dyn_alloc()
1249 		cmd.old.tfdq_addr = cpu_to_le64(txq->dma_addr);  in iwl_txq_dyn_alloc()
1250 		cmd.old.byte_cnt_addr = cpu_to_le64(txq->bc_tbl.dma);  in iwl_txq_dyn_alloc()
1267 		cmd.new.u.add.tfdq_dram_addr = cpu_to_le64(txq->dma_addr);  in iwl_txq_dyn_alloc()
1268 		cmd.new.u.add.bc_dram_addr = cpu_to_le64(txq->bc_tbl.dma);  in iwl_txq_dyn_alloc()
1286 	return iwl_txq_alloc_response(trans, txq, &hcmd);  in iwl_txq_dyn_alloc()
1289 	iwl_txq_gen2_free_memory(trans, txq);  in iwl_txq_dyn_alloc()
1323 	for (i = 0; i < ARRAY_SIZE(trans->txqs.txq); i++) {  in iwl_txq_gen2_tx_free()
1324 		if (!trans->txqs.txq[i])  in iwl_txq_gen2_tx_free()
1337 	if (!trans->txqs.txq[txq_id]) {  in iwl_txq_gen2_init()
1343 		trans->txqs.txq[txq_id] = queue;  in iwl_txq_gen2_init()
1350 		queue = trans->txqs.txq[txq_id];  in iwl_txq_gen2_init()
1359 	trans->txqs.txq[txq_id]->id = txq_id;  in iwl_txq_gen2_init()
1393 			    struct iwl_txq *txq, int index)  in iwl_txq_gen1_tfd_unmap()  argument
1396 	struct iwl_tfd *tfd = iwl_txq_get_tfd(trans, txq, index);  in iwl_txq_gen1_tfd_unmap()
1438 				      struct iwl_txq *txq, u16 byte_cnt,  in iwl_txq_gen1_update_byte_cnt_tbl()  argument
1442 	int write_ptr = txq->write_ptr;  in iwl_txq_gen1_update_byte_cnt_tbl()
1443 	int txq_id = txq->id;  in iwl_txq_gen1_update_byte_cnt_tbl()
1447 	struct iwl_device_tx_cmd *dev_cmd = txq->entries[txq->write_ptr].cmd;  in iwl_txq_gen1_update_byte_cnt_tbl()
1482 				     struct iwl_txq *txq)  in iwl_txq_gen1_inval_byte_cnt_tbl()  argument
1485 	int txq_id = txq->id;  in iwl_txq_gen1_inval_byte_cnt_tbl()
1486 	int read_ptr = txq->read_ptr;  in iwl_txq_gen1_inval_byte_cnt_tbl()
1489 	struct iwl_device_tx_cmd *dev_cmd = txq->entries[read_ptr].cmd;  in iwl_txq_gen1_inval_byte_cnt_tbl()
1515 void iwl_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq)  in iwl_txq_free_tfd()  argument
1520 	int rd_ptr = txq->read_ptr;  in iwl_txq_free_tfd()
1521 	int idx = iwl_txq_get_cmd_index(txq, rd_ptr);  in iwl_txq_free_tfd()
1524 	lockdep_assert_held(&txq->lock);  in iwl_txq_free_tfd()
1526 	if (!txq->entries)  in iwl_txq_free_tfd()
1533 		iwl_txq_gen2_tfd_unmap(trans, &txq->entries[idx].meta,  in iwl_txq_free_tfd()
1534 				       iwl_txq_get_tfd(trans, txq, rd_ptr));  in iwl_txq_free_tfd()
1536 		iwl_txq_gen1_tfd_unmap(trans, &txq->entries[idx].meta,  in iwl_txq_free_tfd()
1537 				       txq, rd_ptr);  in iwl_txq_free_tfd()
1540 	skb = txq->entries[idx].skb;  in iwl_txq_free_tfd()
1548 		txq->entries[idx].skb = NULL;  in iwl_txq_free_tfd()
1552 void iwl_txq_progress(struct iwl_txq *txq)  in iwl_txq_progress()  argument
1554 	lockdep_assert_held(&txq->lock);  in iwl_txq_progress()
1556 	if (!txq->wd_timeout)  in iwl_txq_progress()
1563 	if (txq->frozen)  in iwl_txq_progress()
1570 	if (txq->read_ptr == txq->write_ptr)  in iwl_txq_progress()
1571 		del_timer(&txq->stuck_timer);  in iwl_txq_progress()
1573 		mod_timer(&txq->stuck_timer, jiffies + txq->wd_timeout);  in iwl_txq_progress()
1580 	struct iwl_txq *txq = trans->txqs.txq[txq_id];  in iwl_txq_reclaim()  local
1587 	if (WARN_ON(!txq))  in iwl_txq_reclaim()
1590 	tfd_num = iwl_txq_get_cmd_index(txq, ssn);  in iwl_txq_reclaim()
1591 	read_ptr = iwl_txq_get_cmd_index(txq, txq->read_ptr);  in iwl_txq_reclaim()
1593 	spin_lock_bh(&txq->lock);  in iwl_txq_reclaim()
1605 			   txq_id, txq->read_ptr, tfd_num, ssn);  in iwl_txq_reclaim()
1611 	if (!iwl_txq_used(txq, last_to_free)) {  in iwl_txq_reclaim()
1616 			txq->write_ptr, txq->read_ptr);  in iwl_txq_reclaim()
1629 	     txq->read_ptr = iwl_txq_inc_wrap(trans, txq->read_ptr),  in iwl_txq_reclaim()
1630 	     read_ptr = iwl_txq_get_cmd_index(txq, txq->read_ptr)) {  in iwl_txq_reclaim()
1631 		struct sk_buff *skb = txq->entries[read_ptr].skb;  in iwl_txq_reclaim()
1640 		txq->entries[read_ptr].skb = NULL;  in iwl_txq_reclaim()
1643 			iwl_txq_gen1_inval_byte_cnt_tbl(trans, txq);  in iwl_txq_reclaim()
1645 		iwl_txq_free_tfd(trans, txq);  in iwl_txq_reclaim()
1648 	iwl_txq_progress(txq);  in iwl_txq_reclaim()
1650 	if (iwl_txq_space(trans, txq) > txq->low_mark &&  in iwl_txq_reclaim()
1655 		skb_queue_splice_init(&txq->overflow_q, &overflow_skbs);  in iwl_txq_reclaim()
1664 		txq->overflow_tx = true;  in iwl_txq_reclaim()
1673 		spin_unlock_bh(&txq->lock);  in iwl_txq_reclaim()
1690 		if (iwl_txq_space(trans, txq) > txq->low_mark)  in iwl_txq_reclaim()
1691 			iwl_wake_queue(trans, txq);  in iwl_txq_reclaim()
1693 		spin_lock_bh(&txq->lock);  in iwl_txq_reclaim()
1694 		txq->overflow_tx = false;  in iwl_txq_reclaim()
1698 	spin_unlock_bh(&txq->lock);  in iwl_txq_reclaim()
1704 	struct iwl_txq *txq = trans->txqs.txq[txq_id];  in iwl_txq_set_q_ptrs()  local
1706 	spin_lock_bh(&txq->lock);  in iwl_txq_set_q_ptrs()
1708 	txq->write_ptr = ptr;  in iwl_txq_set_q_ptrs()
1709 	txq->read_ptr = txq->write_ptr;  in iwl_txq_set_q_ptrs()
1711 	spin_unlock_bh(&txq->lock);  in iwl_txq_set_q_ptrs()
1720 		struct iwl_txq *txq = trans->txqs.txq[queue];  in iwl_trans_txq_freeze_timer()  local
1723 		spin_lock_bh(&txq->lock);  in iwl_trans_txq_freeze_timer()
1727 		if (txq->frozen == freeze)  in iwl_trans_txq_freeze_timer()
1733 		txq->frozen = freeze;  in iwl_trans_txq_freeze_timer()
1735 		if (txq->read_ptr == txq->write_ptr)  in iwl_trans_txq_freeze_timer()
1740 						txq->stuck_timer.expires))) {  in iwl_trans_txq_freeze_timer()
1748 			txq->frozen_expiry_remainder =  in iwl_trans_txq_freeze_timer()
1749 				txq->stuck_timer.expires - now;  in iwl_trans_txq_freeze_timer()
1750 			del_timer(&txq->stuck_timer);  in iwl_trans_txq_freeze_timer()
1758 		mod_timer(&txq->stuck_timer,  in iwl_trans_txq_freeze_timer()
1759 			  now + txq->frozen_expiry_remainder);  in iwl_trans_txq_freeze_timer()
1762 		spin_unlock_bh(&txq->lock);  in iwl_trans_txq_freeze_timer()
1772 	struct iwl_txq *txq = trans->txqs.txq[trans->txqs.cmd.q_id];  in iwl_trans_txq_send_hcmd_sync()  local
1803 			txq->read_ptr, txq->write_ptr);  in iwl_trans_txq_send_hcmd_sync()
1847 		txq->entries[cmd_idx].meta.flags &= ~CMD_WANT_SKB;  in iwl_trans_txq_send_hcmd_sync()