[PATCH] mailbox: imx: return TXDB_V2 timeout errors

[Peng Fan]

> Subject: [PATCH] mailbox: imx: return TXDB_V2 timeout errors


Same issue:
https://lore.kernel.org/all/20260617-imx_mbox_rproc-v3-1-77948112defc@linutronix.de/

Regards
Peng.

> 
> imx_mu_generic_tx() retries TXDB_V2 doorbell sends until the GIR bit
> clears, but falls through to the common success return even when
> every
> readl_poll_timeout() attempt failed.
> 
> Return the final timeout error after the retry loop so mailbox clients
> can observe a failed doorbell send instead of treating it as successful.
> 
> Signed-off-by: Pengpeng Hou <pengpeng at iscas.ac.cn>
> ---
>  drivers/mailbox/imx-mailbox.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-
> mailbox.c index 246a9a9e3..86a8a590b 100644
> --- a/drivers/mailbox/imx-mailbox.c
> +++ b/drivers/mailbox/imx-mailbox.c
> @@ -253,6 +253,8 @@ static int imx_mu_generic_tx(struct
> imx_mu_priv *priv,
>  						     cp->type,
> ++count);
>  			}
>  		}
> +		if (ret)
> +			return ret;
>  		break;
>  	default:
>  		dev_warn_ratelimited(priv->dev, "Send data on wrong
> channel type: %d\n", cp->type);
> --
> 2.50.1 (Apple Git-155)
>