[PATCH 4.19 175/639] ath10k: fix dma unmap direction for management frames

[Greg Kroah-Hartman]

From: Rakesh Pillai <pillair@xxxxxxxxxxxxxx>

[ Upstream commit 6e8a8991e2103dcb6a9cff28f460390e8e360848 ]

The management frames transmitted are dma mapped with
direction TO_DEVICE, but incorrectly mapped with
direction FROM_DEVICE during tx complete and error cases.

Fix the direction of dma during dma unmap of the
transmitted management frames.

Tested HW: WCN3990
Tested FW: WLAN.HL.2.0-01188-QCAHLSWMTPLZ-1

Fixes: 38a1390e02b7 ("ath10k: dma unmap mgmt tx buffer if wmi cmd send fails")
Signed-off-by: Rakesh Pillai <pillair@xxxxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/wireless/ath/ath10k/mac.c | 4 ++--
 drivers/net/wireless/ath/ath10k/wmi.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 448e3a8c33a6d..a09d7a07e90a8 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -1,7 +1,7 @@
 /*
  * Copyright (c) 2005-2011 Atheros Communications Inc.
  * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
- * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -3853,7 +3853,7 @@ void ath10k_mgmt_over_wmi_tx_work(struct work_struct *work)
 				ath10k_warn(ar, "failed to transmit management frame by ref via WMI: %d\n",
 					    ret);
 				dma_unmap_single(ar->dev, paddr, skb->len,
-						 DMA_FROM_DEVICE);
+						 DMA_TO_DEVICE);
 				ieee80211_free_txskb(ar->hw, skb);
 			}
 		} else {
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index aefc92d2c09b9..0f6ff7a78e49d 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -1,7 +1,7 @@
 /*
  * Copyright (c) 2005-2011 Atheros Communications Inc.
  * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
- * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -2340,7 +2340,7 @@ static int wmi_process_mgmt_tx_comp(struct ath10k *ar, u32 desc_id,
 
 	msdu = pkt_addr->vaddr;
 	dma_unmap_single(ar->dev, pkt_addr->paddr,
-			 msdu->len, DMA_FROM_DEVICE);
+			 msdu->len, DMA_TO_DEVICE);
 	info = IEEE80211_SKB_CB(msdu);
 
 	if (status)
-- 
2.20.1