linux-kernel - Re: [PATCH] mailbox: Remove WARN_ON for async_cb.cb in cmdq_exec

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Date:   Wed, 29 Sep 2021 22:57:05 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     "jason-jh.lin" <jason-jh.lin@...iatek.com>
Cc:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Jassi Brar <jassisinghbrar@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Yongqiang Niu <yongqiang.niu@...iatek.com>,
        Hsin-Yi Wang <hsinyi@...gle.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Nancy Lin <nancy.lin@...iatek.com>, singo.chang@...iatek.com
Subject: Re: [PATCH] mailbox: Remove WARN_ON for async_cb.cb in cmdq_exec_done

Hi, Jason:

jason-jh.lin <jason-jh.lin@...iatek.com> 於 2021年9月29日 週三 下午3:08寫道：
>
> 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.

Reviewed-by: Chun-Kuang Hu <chunkuang.hu@...nel.org>

>
> Fixes: 1b6b0ce2240e ("mailbox: mtk-cmdq: Use mailbox rx_callback")
> Signed-off-by: jason-jh.lin <jason-jh.lin@...iatek.com>
> ---
>  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 64175a893312..c591dab9d5a4 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;
> --
> 2.18.0
>