From f09450e32adeb4f1a878b23275571a532ab9d99e Mon Sep 17 00:00:00 2001
From: Sara Sharon <sara.sharon@intel.com>
Date: Thu, 19 Jul 2018 09:15:11 +0300
Subject: [PATCH] iwlwifi: pcie: don't reset TXQ write pointer
Git-commit: f09450e32adeb4f1a878b23275571a532ab9d99e
Patch-mainline: v5.0-rc1
References: bsc#1051510

Currently code sets the write pointer when getting the TX queue
allocate response. This causes a redundant interrupt with any actual
change in the pointer. Remove this write altogether.

Fixes: 310181ec34e2 ("iwlwifi: move to TVQM mode")
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c
@@ -1106,8 +1106,7 @@ int iwl_trans_pcie_dyn_txq_alloc(struct
 	/* Place first TFD at index corresponding to start sequence number */
 	txq->read_ptr = wr_ptr;
 	txq->write_ptr = wr_ptr;
-	iwl_write_direct32(trans, HBUS_TARG_WRPTR,
-			   (txq->write_ptr) | (qid << 16));
+
 	IWL_DEBUG_TX_QUEUES(trans, "Activate queue %d\n", qid);
 
 	iwl_free_resp(&hcmd);