On Mon, Nov 14, 2022 at 06:08:41PM +0530, Anshuman Gupta wrote:
> Created igt_pm_open_pci_firmware_node() to refactor
> the retrieving the firmware_node fd code.
>
> igt_pm_open_pci_firmware_node() will be used by other
> firmware_node consumers.
>
> While doing that fixed the leaked fd as well.
>
> v2:
> - return false instead of igt_require on no firmware_node_fd. [Kamil]
> - use igt_assert() when failed to open 'real_power_state' on error
> other then ENONET.
>
> Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
> ---
> lib/igt_pm.c | 36 +++++++++++++++++++++++++-----------
I believe we need a massive refactor in this lib... we have 2 different ways
of using stuff, plus that ugly global restore...
but anyway, this one here looks a good change regardless of the current mess
in the lib.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> 1 file changed, 25 insertions(+), 11 deletions(-)
>
> diff --git a/lib/igt_pm.c b/lib/igt_pm.c
> index 1e6e9ed3f..4f0cfbdd1 100644
> --- a/lib/igt_pm.c
> +++ b/lib/igt_pm.c
> @@ -863,6 +863,20 @@ bool i915_output_is_lpsp_capable(int drm_fd, igt_output_t *output)
> return strstr(buf, "LPSP: capable");
> }
>
> +static int igt_pm_open_pci_firmware_node(struct pci_device *pci_dev)
> +{
> + char name[PATH_MAX];
> + int dir;
> +
> + snprintf(name, PATH_MAX,
> + "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/firmware_node",
> + pci_dev->domain, pci_dev->bus, pci_dev->dev, pci_dev->func);
> +
> + dir = open(name, O_RDONLY);
> +
> + return dir;
> +}
> +
> /**
> * igt_pm_acpi_d3cold_supported:
> * @pci_dev: root port pci_dev.
> @@ -873,23 +887,23 @@ bool i915_output_is_lpsp_capable(int drm_fd, igt_output_t *output)
> */
> bool igt_pm_acpi_d3cold_supported(struct pci_device *pci_dev)
> {
> - char name[PATH_MAX];
> - int dir, fd;
> -
> - snprintf(name, PATH_MAX,
> - "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/firmware_node",
> - pci_dev->domain, pci_dev->bus, pci_dev->dev, pci_dev->func);
> + int firmware_node_fd, fd;
>
> - dir = open(name, O_RDONLY);
> - igt_require(dir > 0);
> + firmware_node_fd = igt_pm_open_pci_firmware_node(pci_dev);
> + if (firmware_node_fd < 0)
> + return false;
>
> /* BIOS need to enable ACPI D3Cold Support.*/
> - fd = openat(dir, "real_power_state", O_RDONLY);
> - if (fd < 0 && errno == ENOENT)
> + fd = openat(firmware_node_fd, "real_power_state", O_RDONLY);
> + if (fd < 0 && errno == ENOENT) {
> + close(firmware_node_fd);
> return false;
> + }
>
> - igt_require(fd > 0);
> + igt_assert(errno > 0);
>
> + close(firmware_node_fd);
> + close(fd);
> return true;
> }
>
> --
> 2.25.1
>
