[PATCH v5 01/11] acpi: thermal: Fix error handling in the register function

[Amit Kucheria]

On Fri, Jun 26, 2020 at 11:08 PM Andrzej Pietrasiewicz
<andrzej.p at collabora.com> wrote:
>
> The acpi_thermal_register_thermal_zone() is missing any error handling.
> This needs to be fixed.
>
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p at collabora.com>
> Reviewed-by: Guenter Roeck <linux at roeck-us.net>
> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie at samsung.com>

Reviewed-by: Amit Kucheria <amit.kucheria at linaro.org>


> ---
>  drivers/acpi/thermal.c | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index 19067a5e5293..6de8066ca1e7 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -901,23 +901,35 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
>         result = sysfs_create_link(&tz->device->dev.kobj,
>                                    &tz->thermal_zone->device.kobj, "thermal_zone");
>         if (result)
> -               return result;
> +               goto unregister_tzd;
>
>         result = sysfs_create_link(&tz->thermal_zone->device.kobj,
>                                    &tz->device->dev.kobj, "device");
>         if (result)
> -               return result;
> +               goto remove_tz_link;
>
>         status =  acpi_bus_attach_private_data(tz->device->handle,
>                                                tz->thermal_zone);
> -       if (ACPI_FAILURE(status))
> -               return -ENODEV;
> +       if (ACPI_FAILURE(status)) {
> +               result = -ENODEV;
> +               goto remove_dev_link;
> +       }
>
>         tz->tz_enabled = 1;
>
>         dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
>                  tz->thermal_zone->id);
> +
>         return 0;
> +
> +remove_dev_link:
> +       sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
> +remove_tz_link:
> +       sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
> +unregister_tzd:
> +       thermal_zone_device_unregister(tz->thermal_zone);
> +
> +       return result;
>  }
>
>  static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
> --
> 2.17.1
>