linux-kernel - Re: [PATCH v3] remoteproc: imx: Fix invalid loaded resource table detection

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Message-ID: <aYIiOtUpTebzMZcd@p14s>
Date: Tue, 3 Feb 2026 09:28:42 -0700
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: Bjorn Andersson <andersson@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Iuliana Prodan <iuliana.prodan@....com>,
	Daniel Baluta <daniel.baluta@....com>, Frank Li <frank.li@....com>,
	linux-remoteproc@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Peng Fan <peng.fan@....com>, stable@...r.kernel.org
Subject: Re: [PATCH v3] remoteproc: imx: Fix invalid loaded resource table
 detection

On Thu, Jan 29, 2026 at 09:44:48AM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> imx_rproc_elf_find_loaded_rsc_table() may incorrectly report a loaded
> resource table even when the current firmware does not provide one.
> 
> When the device tree contains a "rsc-table" entry, priv->rsc_table is
> non-NULL and denotes where a resource table would be located if one is
> present in memory. However, when the current firmware has no resource
> table, rproc->table_ptr is NULL. The function still returns
> priv->rsc_table, and the remoteproc core interprets this as a valid loaded
> resource table.
> 
> Fix this by returning NULL from imx_rproc_elf_find_loaded_rsc_table() when
> there is no resource table for the current firmware (i.e. when
> rproc->table_ptr is NULL). This aligns the function's semantics with the
> remoteproc core: a loaded resource table is only reported when a valid
> table_ptr exists.
> 
> With this change, starting firmware without a resource table no longer
> triggers a crash.
> 
> Fixes: e954a1bd1610 ("remoteproc: imx_rproc: Use imx specific hook for find_loaded_rsc_table")
> Cc: stable@...r.kernel.org
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
> Changes in v3:
> - Update patch subject and commit message using this one [1]
>   [1] https://lore.kernel.org/all/CANLsYkyrz+A1iEabGZ6rFybFo4=mM+TPVDRSckFB2YUS_7aKow@mail.gmail.com/
> - Link to v2: https://lore.kernel.org/r/20260127-imx-rproc-fix-v2-1-7288fcf74385@nxp.com
> 
> Changes in v2:
> - Per Mathieu, Check rproc->table_ptr, update commit log
> - Include R-b from Frank
> - Link to v1: https://lore.kernel.org/r/20260122-imx-rproc-fix-v1-1-36cc64369a40@nxp.com
> ---
>  drivers/remoteproc/imx_rproc.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index 375de79168a1c8d11b87ac1bd63774a3feac106d..f5f916d6790519360f446f063e09d018c5654953 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -729,6 +729,10 @@ imx_rproc_elf_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *
>  {
>  	struct imx_rproc *priv = rproc->priv;
>  
> +	/* No resource table in the firmware */
> +	if (!rproc->table_ptr)
> +		return NULL;
> +
>  	if (priv->rsc_table)
>  		return (struct resource_table *)priv->rsc_table;
>

Applied.

Thanks,
Mathieu
  
> 
> ---
> base-commit: e3b32dcb9f23e3c3927ef3eec6a5842a988fb574
> change-id: 20260122-imx-rproc-fix-e206f8e6e477
> 
> Best regards,
> -- 
> Peng Fan <peng.fan@....com>
>