linux-kernel - Re: [PATCH] remoteproc: imx_dsp_rproc: only reset carveout memory at RPROC

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Message-ID: <ad45e803-1235-4320-a87b-a60b18df2cf0@nxp.com>
Date: Thu, 18 Dec 2025 01:06:27 +0200
From: Iuliana Prodan <iuliana.prodan@....com>
To: Shengjiu Wang <shengjiu.wang@....com>, andersson@...nel.org,
 mathieu.poirier@...aro.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
 kernel@...gutronix.de, festevam@...il.com, daniel.baluta@....com,
 linux-remoteproc@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] remoteproc: imx_dsp_rproc: only reset carveout memory at
 RPROC_OFFLINE state

On 12/16/2025 9:42 AM, Shengjiu Wang wrote:
> Don't need to reset memory at suspend and resume stage, because some
> memory is used to save the software state for resume, if it is cleared,
> the resume operation can fail.
> 
> Fixes: c4c432dfb00f ("remoteproc: imx_dsp_rproc: Add support of recovery and coredump process")
> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>

Reviewed-by: Iuliana Prodan <iuliana.prodan@....com>

Thanks,
Iulia

> ---
>   drivers/remoteproc/imx_dsp_rproc.c | 8 +++++---
>   1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
> index d03017d6b214..ac8aa71aa56c 100644
> --- a/drivers/remoteproc/imx_dsp_rproc.c
> +++ b/drivers/remoteproc/imx_dsp_rproc.c
> @@ -984,9 +984,11 @@ static int imx_dsp_rproc_load(struct rproc *rproc, const struct firmware *fw)
>   	 * Clear buffers after pm rumtime for internal ocram is not
>   	 * accessible if power and clock are not enabled.
>   	 */
> -	list_for_each_entry(carveout, &rproc->carveouts, node) {
> -		if (carveout->va)
> -			memset(carveout->va, 0, carveout->len);
> +	if (rproc->state == RPROC_OFFLINE) {
> +		list_for_each_entry(carveout, &rproc->carveouts, node) {
> +			if (carveout->va)
> +				memset(carveout->va, 0, carveout->len);
> +		}
>   	}
>   
>   	ret = imx_dsp_rproc_elf_load_segments(rproc, fw);