[LTP] rfim: add new test for verifying RFIM sysfs interface

[linuxtestproject.agent@gmail.com]

Hi Piotr,

On Thu, 18 Jun 2026, Piotr Kubaj wrote:
> rfim: add new test for verifying RFIM sysfs interface

> +#define RFIM_ROOT "/sys/bus/pci/devices/0000:00:04.0"

The PCI BDF is hardcoded here. The proc_thermal driver matches by
PCI device ID (PCI_DEVICE_ID_INTEL_*_THERMAL), not by slot. While
00:04.0 is the typical BDF on current Intel client SoCs, could this
be discovered dynamically instead -- e.g. by scanning
/sys/bus/pci/devices/*/driver for a proc_thermal link, or by looking
up the device via its class or vendor:device pair?

This would prevent a silent TCONF on any future platform where the
thermal device appears at a different BDF.

> +static void check_read_only(const char *path)
> +{
> +	int fd = TST_EXP_FD(open(path, O_RDONLY));
> +
> +	if (fd >= 0)
> +		SAFE_CLOSE(fd);

LTP convention is to use "fd != -1" rather than "fd >= 0" for fd
validity checks. Same applies in check_read_write().

Verdict - Needs revision

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