From: Daniel Mack <daniel@zonque.org>
Date: Wed, 23 May 2018 08:14:44 +0000 (+0300)
Subject: wcn36xx: consider CTRL_EOP bit when looking for valid descriptors
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=18c7ed138824119f2ef9c9019e222e3e750b42b8;p=linux.git

wcn36xx: consider CTRL_EOP bit when looking for valid descriptors

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>
---

diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
index 8c64e05ca3b76..06cfe8d311f39 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);