release/5.2.42/soc-mediatek-knows_txdone-needs-to-be-set-in-Mediate.patch

From 76000674daffba1985c1bacd1f69864bdd0899ef Mon Sep 17 00:00:00 2001
From: Bibby Hsieh <bibby.hsieh@mediatek.com>
Date: Fri, 14 Feb 2020 12:35:45 +0800
Subject: [PATCH] soc: mediatek: knows_txdone needs to be set in Mediatek CMDQ
 helper

commit ce35e21d82bcac8b3fd5128888f9e233f8444293 upstream.

Mediatek CMDQ driver have a mechanism to do TXDONE_BY_ACK,
so we should set knows_txdone.

Fixes:576f1b4bc802 ("soc: mediatek: Add Mediatek CMDQ helper")

Cc: stable@vger.kernel.org # v5.0+
Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index ff9fef5a032b..68fdcb466131 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -38,6 +38,7 @@ struct cmdq_client *cmdq_mbox_create(struct device *dev, int index, u32 timeout)
 	client->pkt_cnt = 0;
 	client->client.dev = dev;
 	client->client.tx_block = false;
+	client->client.knows_txdone = true;
 	client->chan = mbox_request_channel(&client->client, index);
 
 	if (IS_ERR(client->chan)) {
-- 
2.7.4