Re: [PATCH v3 05/13] soc: mediatek: cmdq: return send msg error code

[CK Hu]

Hi, Dennis:

On Fri, 2020-02-28 at 21:44 +0800, Dennis YC Hsieh wrote:
> Return error code to client if send message fail,
> so that client has chance to error handling.
> 
> Fixes: 576f1b4bc802 ("soc: mediatek: Add Mediatek CMDQ helper")
> Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@xxxxxxxxxxxx>
> ---
>  drivers/soc/mediatek/mtk-cmdq-helper.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 2e1bc513569b..0698612de5ad 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -351,11 +351,11 @@ int cmdq_pkt_flush_async(struct cmdq_pkt *pkt, cmdq_async_flush_cb cb,
>  		spin_unlock_irqrestore(&client->lock, flags);
>  	}
>  
> -	mbox_send_message(client->chan, pkt);
> +	err = mbox_send_message(client->chan, pkt);
>  	/* We can send next packet immediately, so just call txdone. */
>  	mbox_client_txdone(client->chan, 0);

If error happen, why tx is done? I think you should return immediately
when error happen.

Regards,
CK

>  
> -	return 0;
> +	return err;
>  }
>  EXPORT_SYMBOL(cmdq_pkt_flush_async);
>