From 4f40b423339b8121fbd5d6735bf6942020355c98 Mon Sep 17 00:00:00 2001
From: Ben Greear <greearb@candelatech.com>
Date: Wed, 31 May 2017 14:21:26 +0300
Subject: [PATCH] ath10k: initialize nbytes to 0
Git-commit: 4f40b423339b8121fbd5d6735bf6942020355c98
Patch-mainline: v4.13-rc1
References: FATE#326906
ath10k firmware checks nbytes == 0 as part of determining if DMA
has completed successfully. To help make this work more often,
have the driver initialize nbytes to zero when freeing the descriptor
slot.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/ath/ath10k/ce.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/wireless/ath/ath10k/ce.c b/drivers/net/wireless/ath/ath10k/ce.c
index ee1090ca2eac..51309563990f 100644
--- a/drivers/net/wireless/ath/ath10k/ce.c
+++ b/drivers/net/wireless/ath/ath10k/ce.c
@@ -594,6 +594,7 @@ int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
unsigned int nentries_mask = src_ring->nentries_mask;
unsigned int sw_index = src_ring->sw_index;
unsigned int read_index;
+ struct ce_desc *desc;
if (src_ring->hw_index == sw_index) {
/*
@@ -623,6 +624,9 @@ int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
/* sanity */
src_ring->per_transfer_context[sw_index] = NULL;
+ desc = CE_SRC_RING_TO_DESC(src_ring->base_addr_owner_space,
+ sw_index);
+ desc->nbytes = 0;
/* Update sw_index */
sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);
--
2.19.2