[PATCH v4 05/13] soc: mediatek: cmdq: return send msg error code

[CK Hu]

Hi, Dennis:

On Tue, 2020-03-03 at 18:58 +0800, Dennis YC Hsieh wrote:
> Return error code to client if send message fail,
> so that client has chance to error handling.
> 

Reviewed-by: CK Hu <ck.hu at mediatek.com>

> Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh at mediatek.com>
> Fixes: 576f1b4bc802 ("soc: mediatek: Add Mediatek CMDQ helper")
> ---
>  drivers/soc/mediatek/mtk-cmdq-helper.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 2e1bc513569b..98f23ba3ba47 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -351,7 +351,9 @@ 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);
> +	if (err < 0)
> +		return err;
>  	/* We can send next packet immediately, so just call txdone. */
>  	mbox_client_txdone(client->chan, 0);
>