On Sat, Jan 17, 2026 at 10:03:51PM +0800, Xingjing Deng wrote:
> In the SDSP probe path, qcom_scm_assign_mem() is used to assign the
> reserved memory to the configured VMIDs, but its return value was not
> checked.
>
> Fail the probe if the SCM call fails to avoid continuing with an
> unexpected/incorrect memory permission configuration.
>
> The file has passed the check of checkpatch.
>
> Fixes: c3c0363bc72d4 ("misc: fastrpc: support complete DMA pool access to the
> DSP")
> Cc: [email protected] # 6.11-rc1
> Signed-off-by: Xingjing Deng <[email protected]>
> ---
> v5:
> - Squash the functional change and indentation fix into a single patch.
> - Link to v4:
> https://lore.kernel.org/linux-arm-msm/2026011637-statute-showy-2c3f@gregkh/T/#t
>
> v4:
> - Format the indentation
> - Link to v3:
> https://lore.kernel.org/linux-arm-msm/[email protected]/T/#t
>
> v3:
> - Add missing [email protected] to cc list.
> - Standarlize changelog placement/format.
> - Link to v2:
> https://lore.kernel.org/linux-arm-msm/[email protected]/T/#t
>
> v2:
> - Add Fixes: and Cc: stable tags.
> - Link to v1:
> https://lore.kernel.org/linux-arm-msm/[email protected]/T/#u
> ---
> drivers/misc/fastrpc.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
> index fb3b54e05928..d9650efa443f 100644
> --- a/drivers/misc/fastrpc.c
> +++ b/drivers/misc/fastrpc.c
> @@ -2338,8 +2338,13 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device
> *rpdev)
> if (!err) {
> src_perms = BIT(QCOM_SCM_VMID_HLOS);
>
> - qcom_scm_assign_mem(res.start, resource_size(&res),
> &src_perms,
> - data->vmperms, data->vmcount);
> + err = qcom_scm_assign_mem(res.start,
> resource_size(&res), &src_perms,
> + data->vmperms, data->vmcount);
> + if (err) {
> + dev_err(rdev, "Failed to assign memory phys
> 0x%llx size 0x%llx err %d",
> + res.start, resource_size(&res), err);
Shouldn't the caller function report the error?
How as this found and tested?
thanks,
greg k-h
