linux-kernel - Re: [PATCH] remoteproc: stm32: Improve crash recovery time

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Date:   Mon, 3 Jan 2022 11:52:25 -0700
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH] remoteproc: stm32: Improve crash recovery time

On Tue, Dec 21, 2021 at 03:31:29PM +0100, Arnaud Pouliquen wrote:
> When a stop is requested on a crash, it is useless to try to shutdown it
> gracefully, it is crashed.
>

Right

> In this case don't send the STM32_MBX_SHUTDOWN mailbox message that
> will block the recovery during 500 ms, waiting an answer from the
> coprocessor.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
> ---
>  drivers/remoteproc/stm32_rproc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
> index b643efcf995a..7d782ed9e589 100644
> --- a/drivers/remoteproc/stm32_rproc.c
> +++ b/drivers/remoteproc/stm32_rproc.c
> @@ -494,7 +494,7 @@ static int stm32_rproc_stop(struct rproc *rproc)
>  	int err, idx;
>  
>  	/* request shutdown of the remote processor */
> -	if (rproc->state != RPROC_OFFLINE) {
> +	if (rproc->state != RPROC_OFFLINE && rproc->state != RPROC_CRASHED) {
>  		idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN);
>  		if (idx >= 0 && ddata->mb[idx].chan) {
>  			err = mbox_send_message(ddata->mb[idx].chan, "detach");

I have applied this patch.

Thanks,
Mathieu

> -- 
> 2.17.1
>