[PATCH] remoteproc: imx_dsp_rproc: only reset carveout memory at RPROC_OFFLINE state

[PATCH] remoteproc: imx_dsp_rproc: only reset carveout memory at RPROC_OFFLINE state

[Shengjiu Wang]

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@nxp.com>
---
 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);
-- 
2.34.1

Re: [PATCH] remoteproc: imx_dsp_rproc: only reset carveout memory at RPROC_OFFLINE state

[Daniel Baluta]

On Tue, Dec 16, 2025 at 9:59 AM Shengjiu Wang <shengjiu.wang@nxp.com> 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.

I would rephrase this as "Do not reset memory ...".

"Don't need .." suggests that this operation is unnecessary, but not wrong.

With that,

Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>

Re: [PATCH] remoteproc: imx_dsp_rproc: only reset carveout memory at RPROC_OFFLINE state

[Iuliana Prodan]

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@nxp.com>

Reviewed-by: Iuliana Prodan <iuliana.prodan@nxp.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);