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dkim=pass header.d=valla.it header.s=default header.a=rsa-sha256; arc=none Hi Laurentiu, On Mon, Oct 19, 2026 at 02:55:49PM -0400, Frank.Li@oss.nxp.com wrote: > From: Laurentiu Mihalcea > > The driver currently derives the memory region type from the referenced > memory node name, creating a hidden DT ABI. Since memory node names are > not constrained by the binding, incorrect names can silently pass DT > validation, as seen in examples using "vdevbuffer" instead of > "vdev0buffer" ([1] and [2]). > > Parse memory-region-names to identify the expected memory regions and avoid > relying on memory node names as ABI. > > Link: https://lore.kernel.org/imx/a3602ef8-2b77-4cc3-adef-2c4cba08a5d9@nabladev.com/ [1] > Link: https://lore.kernel.org/imx/alexXTYQHUs76J7v@SMW015318/T/#mb9dc709ff3adc24d9db6d30c973f37b580f6f1f9 [2] > > Signed-off-by: Laurentiu Mihalcea > Reviewed-by: Peng Fan > Signed-off-by: Frank Li > --- > drivers/remoteproc/imx_rproc.c | 32 ++++++++++++++++++++++++++++++-- > 1 file changed, 30 insertions(+), 2 deletions(-) > > diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c > index 581bb07f5893f..714c3615d1884 100644 > --- a/drivers/remoteproc/imx_rproc.c > +++ b/drivers/remoteproc/imx_rproc.c > @@ -28,6 +28,25 @@ > #include "imx_rproc.h" > #include "remoteproc_internal.h" > > +static int imx_rproc_rmem_to_resource(struct device_node *np, > + int index, > + struct resource *res) > +{ > + int ret; > + > + ret = of_reserved_mem_region_to_resource(np, index, res); > + if (ret) > + return ret; > + > + /* "memory-region-names" is optional */ > + ret = of_property_read_string_index(np, "memory-region-names", > + index, &res->name); > + if (ret == -EINVAL) > + return 0; > + > + return ret; > +} > + The position of this code here seems wrong - please move it down in this same file, near the other functions. With that fixed: Reviewed-by: Francesco Valla > #define IMX7D_SRC_SCR 0x0C > #define IMX7D_ENABLE_M4 BIT(3) > #define IMX7D_SW_M4P_RST BIT(2) > @@ -648,7 +667,7 @@ static int imx_rproc_prepare(struct rproc *rproc) > int err; > struct resource res; > > - err = of_reserved_mem_region_to_resource(np, i++, &res); > + err = imx_rproc_rmem_to_resource(np, i++, &res); > if (err) > break; > > @@ -823,11 +842,20 @@ static int imx_rproc_addr_init(struct imx_rproc *priv, > if (nph <= 0) > return 0; > > + if (!of_property_present(np, "memory-region-names")) { > + dev_warn(dev, "using node names for carveouts should be avoided\n"); > + } else { > + if (nph != of_property_count_strings(np, "memory-region-names")) { > + dev_err(dev, "invalid reserved memory name count\n"); > + return -EINVAL; > + } > + } > + > /* remap optional addresses */ > for (a = 0; a < nph; a++) { > struct resource res; > > - err = of_reserved_mem_region_to_resource(np, a, &res); > + err = imx_rproc_rmem_to_resource(np, a, &res); > if (err) { > dev_err(dev, "unable to resolve memory region\n"); > return err; > > -- > 2.43.0 > > Thank you! Regards, Francesco