linux-kernel - [PATCH 5.15 444/917] mailbox: Remove WARN_ON for async_cb.cb in cmdq_exec

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Date:   Mon, 15 Nov 2021 17:58:59 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, "jason-jh.lin" <jason-jh.lin@...iatek.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 444/917] mailbox: Remove WARN_ON for async_cb.cb in cmdq_exec_done

From: jason-jh.lin <jason-jh.lin@...iatek.com>

[ Upstream commit ce1537fe288469bf68ee0aabdb860a790b4755ef ]

Because mtk_drm_crtc_update_config is not using cmdq_pkt_flush_async,
it won't have pkt->async_cb.cb anymore.

So remove the WARN_ON check of pkt->async_cb.cb at cmdq_exec_done.

Fixes: 1b6b0ce2240e ("mailbox: mtk-cmdq: Use mailbox rx_callback")
Signed-off-by: jason-jh.lin <jason-jh.lin@...iatek.com>
Reviewed-by: Chun-Kuang Hu <chunkuang.hu@...nel.org>
Tested-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
Signed-off-by: Jassi Brar <jaswinder.singh@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mailbox/mtk-cmdq-mailbox.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index 64175a893312e..c591dab9d5a48 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -195,7 +195,6 @@ static void cmdq_task_exec_done(struct cmdq_task *task, int sta)
 	struct cmdq_task_cb *cb = &task->pkt->async_cb;
 	struct cmdq_cb_data data;
 
-	WARN_ON(cb->cb == (cmdq_async_flush_cb)NULL);
 	data.sta = sta;
 	data.data = cb->data;
 	data.pkt = task->pkt;
-- 
2.33.0