From 18c7ed138824119f2ef9c9019e222e3e750b42b8 Mon Sep 17 00:00:00 2001
From: Daniel Mack <daniel@zonque.org>
Date: Wed, 23 May 2018 11:14:44 +0300
Subject: [PATCH] wcn36xx: consider CTRL_EOP bit when looking for valid descriptors
Git-commit: 18c7ed138824119f2ef9c9019e222e3e750b42b8
Patch-mainline: v4.18-rc1
References: FATE#326906
In reap_tx_dxes(), when we iterate over the linked descriptors, only
consider such valid that have WCN36xx_DXE_CTRL_EOP set.
This is what the prima downstream driver is doing as well.
Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/ath/wcn36xx/dxe.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
index 8c64e05ca3b7..06cfe8d311f3 100644
--- a/drivers/net/wireless/ath/wcn36xx/dxe.c
+++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
@@ -370,7 +370,9 @@ static void reap_tx_dxes(struct wcn36xx *wcn, struct wcn36xx_dxe_ch *ch)
do {
if (READ_ONCE(ctl->desc->ctrl) & WCN36xx_DXE_CTRL_VLD)
break;
- if (ctl->skb) {
+
+ if (ctl->skb &&
+ READ_ONCE(ctl->desc->ctrl) & WCN36xx_DXE_CTRL_EOP) {
dma_unmap_single(wcn->dev, ctl->desc->src_addr_l,
ctl->skb->len, DMA_TO_DEVICE);
info = IEEE80211_SKB_CB(ctl->skb);
--
2.19.2